Oracle查询dba_extents视图很慢
Oracle查询dba_extents视图很慢
问题描述
下边这条SQL查询每次大概要花1分钟左右，实在是比较异常。
- select owner,tablespace_name from dba_extents where segment_name='AUD$' group by owner,tablespace_name;
测试分析
先实际跑完一遍，去详细的执行信息。
模板复制：
- set pagesize 9999 long 9999 line 500
- alter session set statistics_level=all;
- select owner,tablespace_name from dba_extents where segment_name='AUD$' group by owner,tablespace_name;
- select * from table(dbms_xplan.display_cursor(null,null,'allstats last'));
执行时间如下：
- 20:25:06 SYS@anonymous> set pagesize 9999 long 9999 line 500
- 20:25:15 SYS@anonymous> alter session set statistics_level=all;
- Session altered.
- Elapsed: 00:00:00.00
- 20:26:33 SYS@anonymous> select owner,tablespace_name from dba_extents where segment_name='AUD$' group by owner,tablespace_name;
- OWNER TABLESPACE_NAME
- ------------------------------ ------------------------------
- SYS SYSTEM
- Elapsed: 00:01:01.87
获取执行计划：
- 20:27:48 SYS@anonymous> select * from table(dbms_xplan.display_cursor(null,null,'allstats last'));
- PLAN_TABLE_OUTPUT
- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- SQL_ID dggb0d96bj8dy, child number 4
- -------------------------------------
- select owner,tablespace_name from dba_extents where segment_name='AUD$'
- group by owner,tablespace_name
- Plan hash value: 1482657742
- ------------------------------------------------------------------------------------------------------------------------------------------------------------
- | Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | Reads | OMem | 1Mem | Used-Mem |
- ------------------------------------------------------------------------------------------------------------------------------------------------------------
- | 0 | SELECT STATEMENT | | 1 | | 1 |00:01:01.87 | 190K| 7157 | | | |
- | 1 | HASH GROUP BY | | 1 | 543K| 1 |00:01:01.87 | 190K| 7157 | 2331K| 2194K| 435K (0)|
- | 2 | VIEW | DBA_EXTENTS | 1 | 543K| 259 |00:01:01.87 | 190K| 7157 | | | |
- | 3 | UNION-ALL | | 1 | | 259 |00:01:01.87 | 190K| 7157 | | | |
- | 4 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | 0 | | | |
- | 5 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | 0 | | | |
- | 6 | TABLE ACCESS FULL | UET$ | 1 | 1 | 0 |00:00:00.01 | 310 | 0 | | | |
- |* 7 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 8 | VIEW | SYS_DBA_SEGS | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 9 | UNION ALL PUSHED PREDICATE | | 0 | | 0 |00:00:00.01 | 0 | 0 | | | |
- | 10 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 11 | NESTED LOOPS OUTER | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 12 | MERGE JOIN CARTESIAN | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 13 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 14 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 15 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 16 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 17 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 18 | TABLE ACCESS CLUSTER | SEG$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 19 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 20 | BUFFER SORT | | 0 | 2 | 0 |00:00:00.01 | 0 | 0 | 73728 | 73728 | |
- |* 21 | INDEX SKIP SCAN | I_OBJ2 | 0 | 2 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 22 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 23 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 24 | VIEW | SYS_OBJECTS | 0 | 5 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 25 | UNION ALL PUSHED PREDICATE | | 0 | | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 26 | TABLE ACCESS CLUSTER | TAB$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 27 | INDEX UNIQUE SCAN | I_OBJ# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 28 | TABLE ACCESS BY INDEX ROWID | TABPART$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 29 | INDEX UNIQUE SCAN | I_TABPART_OBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 30 | TABLE ACCESS CLUSTER | CLU$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 31 | INDEX UNIQUE SCAN | I_OBJ# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 32 | TABLE ACCESS BY INDEX ROWID | IND$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 33 | INDEX UNIQUE SCAN | I_IND1 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 34 | TABLE ACCESS BY INDEX ROWID | INDPART$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 35 | INDEX UNIQUE SCAN | I_INDPART_OBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 36 | TABLE ACCESS BY INDEX ROWID | LOB$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 37 | INDEX UNIQUE SCAN | I_LOB2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 38 | TABLE ACCESS BY INDEX ROWID | TABSUBPART$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 39 | INDEX UNIQUE SCAN | I_TABSUBPART$_OBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 40 | TABLE ACCESS BY INDEX ROWID | INDSUBPART$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 41 | INDEX UNIQUE SCAN | I_INDSUBPART_OBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 42 | TABLE ACCESS BY INDEX ROWID | LOBFRAG$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 43 | INDEX UNIQUE SCAN | I_LOBFRAG$_FRAGOBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 44 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 45 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 46 | NESTED LOOPS OUTER | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 47 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 48 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 49 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 50 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 51 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 52 | TABLE ACCESS CLUSTER | SEG$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 53 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 54 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 55 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 56 | INDEX RANGE SCAN | I_UNDO2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 57 | TABLE ACCESS BY INDEX ROWID | UNDO$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 58 | NESTED LOOPS OUTER | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 59 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 60 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 61 | TABLE ACCESS BY INDEX ROWID | FILE$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 62 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 63 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 64 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 65 | TABLE ACCESS CLUSTER | SEG$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 66 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 67 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 68 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 69 | HASH JOIN | | 1 | 543K| 259 |00:01:01.87 | 190K| 7157 | 1214K| 1214K| 709K (0)|
- |* 70 | HASH JOIN | | 1 | 20549 | 1 |00:00:00.33 | 138K| 0 | 1969K| 1969K| 1531K (0)|
- | 71 | INDEX FULL SCAN | I_FILE2 | 1 | 106 | 108 |00:00:00.01 | 1 | 0 | | | |
- | 72 | VIEW | SYS_DBA_SEGS | 1 | 6785 | 1 |00:00:00.33 | 138K| 0 | | | |
- | 73 | UNION-ALL | | 1 | | 1 |00:00:00.33 | 138K| 0 | | | |
- | 74 | NESTED LOOPS | | 1 | 6783 | 1 |00:00:00.32 | 137K| 0 | | | |
- | 75 | NESTED LOOPS OUTER | | 1 | 2 | 10578 |00:00:00.10 | 21543 | 0 | | | |
- | 76 | MERGE JOIN CARTESIAN | | 1 | 2 | 10578 |00:00:00.07 | 10961 | 0 | | | |
- | 77 | NESTED LOOPS | | 1 | 1 | 10578 |00:00:00.06 | 10896 | 0 | | | |
- | 78 | NESTED LOOPS | | 1 | 1 | 10578 |00:00:00.03 | 314 | 0 | | | |
- |* 79 | TABLE ACCESS FULL | SEG$ | 1 | 1 | 10578 |00:00:00.02 | 310 | 0 | | | |
- |* 80 | INDEX UNIQUE SCAN | I_FILE2 | 10578 | 1 | 10578 |00:00:00.01 | 4 | 0 | | | |
- | 81 | TABLE ACCESS CLUSTER | TS$ | 10578 | 1 | 10578 |00:00:00.02 | 10582 | 0 | | | |
- |* 82 | INDEX UNIQUE SCAN | I_TS# | 10578 | 1 | 10578 |00:00:00.01 | 4 | 0 | | | |
- | 83 | BUFFER SORT | | 10578 | 2 | 10578 |00:00:00.01 | 65 | 0 | 2048 | 2048 | 2048 (0)|
- |* 84 | INDEX SKIP SCAN | I_OBJ2 | 1 | 2 | 1 |00:00:00.01 | 65 | 0 | | | |
- | 85 | TABLE ACCESS CLUSTER | USER$ | 10578 | 1 | 10578 |00:00:00.02 | 10582 | 0 | | | |
- |* 86 | INDEX UNIQUE SCAN | I_USER# | 10578 | 1 | 10578 |00:00:00.01 | 4 | 0 | | | |
- |* 87 | VIEW | SYS_OBJECTS | 10578 | 2 | 1 |00:00:00.22 | 116K| 0 | | | |
- | 88 | UNION ALL PUSHED PREDICATE | | 10578 | | 10578 |00:00:00.21 | 116K| 0 | | | |
- |* 89 | TABLE ACCESS CLUSTER | TAB$ | 10578 | 1 | 10578 |00:00:00.03 | 21161 | 0 | | | |
- |* 90 | INDEX UNIQUE SCAN | I_OBJ# | 10578 | 1 | 10578 |00:00:00.01 | 10583 | 0 | | | |
- | 91 | TABLE ACCESS BY INDEX ROWID | TABPART$ | 10578 | 1 | 0 |00:00:00.01 | 10583 | 0 | | | |
- |* 92 | INDEX UNIQUE SCAN | I_TABPART_OBJ$ | 10578 | 1 | 0 |00:00:00.01 | 10583 | 0 | | | |
- | 93 | TABLE ACCESS CLUSTER | CLU$ | 10578 | 1 | 0 |00:00:00.02 | 21161 | 0 | | | |
- |* 94 | INDEX UNIQUE SCAN | I_OBJ# | 10578 | 1 | 10578 |00:00:00.01 | 10583 | 0 | | | |
- |* 95 | TABLE ACCESS BY INDEX ROWID | IND$ | 10578 | 1 | 0 |00:00:00.01 | 10583 | 0 | | | |
- |* 96 | INDEX UNIQUE SCAN | I_IND1 | 10578 | 1 | 0 |00:00:00.01 | 10583 | 0 | | | |
- | 97 | TABLE ACCESS BY INDEX ROWID | INDPART$ | 10578 | 1 | 0 |00:00:00.01 | 10578 | 0 | | | |
- |* 98 | INDEX UNIQUE SCAN | I_INDPART_OBJ$ | 10578 | 1 | 0 |00:00:00.01 | 10578 | 0 | | | |
- |* 99 | TABLE ACCESS BY INDEX ROWID | LOB$ | 10578 | 1 | 0 |00:00:00.01 | 10583 | 0 | | | |
- |*100 | INDEX UNIQUE SCAN | I_LOB2 | 10578 | 1 | 0 |00:00:00.01 | 10583 | 0 | | | |
- | 101 | TABLE ACCESS BY INDEX ROWID | TABSUBPART$ | 10578 | 1 | 0 |00:00:00.01 | 10578 | 0 | | | |
- |*102 | INDEX UNIQUE SCAN | I_TABSUBPART$_OBJ$ | 10578 | 1 | 0 |00:00:00.01 | 10578 | 0 | | | |
- | 103 | TABLE ACCESS BY INDEX ROWID | INDSUBPART$ | 10578 | 1 | 0 |00:00:00.01 | 10578 | 0 | | | |
- |*104 | INDEX UNIQUE SCAN | I_INDSUBPART_OBJ$ | 10578 | 1 | 0 |00:00:00.01 | 10578 | 0 | | | |
- | 105 | TABLE ACCESS BY INDEX ROWID | LOBFRAG$ | 10578 | 1 | 0 |00:00:00.01 | 10578 | 0 | | | |
- |*106 | INDEX UNIQUE SCAN | I_LOBFRAG$_FRAGOBJ$ | 10578 | 1 | 0 |00:00:00.01 | 10578 | 0 | | | |
- | 107 | NESTED LOOPS OUTER | | 1 | 1 | 0 |00:00:00.01 | 2 | 0 | | | |
- | 108 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 2 | 0 | | | |
- | 109 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 2 | 0 | | | |
- | 110 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 2 | 0 | | | |
- |*111 | TABLE ACCESS BY INDEX ROWID| UNDO$ | 1 | 1 | 0 |00:00:00.01 | 2 | 0 | | | |
- |*112 | INDEX RANGE SCAN | I_UNDO2 | 1 | 1 | 0 |00:00:00.01 | 2 | 0 | | | |
- |*113 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |*114 | TABLE ACCESS CLUSTER | SEG$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |*115 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 116 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |*117 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 118 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |*119 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 120 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | 0 | | | |
- | 121 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | 0 | | | |
- | 122 | NESTED LOOPS OUTER | | 1 | 1 | 0 |00:00:00.01 | 310 | 0 | | | |
- | 123 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | 0 | | | |
- |*124 | TABLE ACCESS FULL | SEG$ | 1 | 1 | 0 |00:00:00.01 | 310 | 0 | | | |
- | 125 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |*126 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 127 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |*128 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |*129 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |*130 | TABLE ACCESS BY INDEX ROWID | FILE$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 131 | FIXED TABLE FULL | X$KTFBUE | 1 | 100K| 723K|00:01:01.20 | 52350 | 7157 | | | |
- ------------------------------------------------------------------------------------------------------------------------------------------------------------
- Predicate Information (identified by operation id):
- ---------------------------------------------------
- 7 - access("E"."TS#"="F"."TS#" AND "E"."FILE#"="F"."RELFILE#")
- 15 - access("F"."TS#"="E"."TS#" AND "F"."RELFILE#"="E"."SEGFILE#")
- 17 - access("TS"."TS#"="E"."TS#")
- 18 - filter((BITAND(NVL("S"."SPARE1",0),1)=0 AND BITAND(NVL("S"."SPARE1",0),65536)=0))
- 19 - access("S"."TS#"="E"."TS#" AND "S"."FILE#"="E"."SEGFILE#" AND "S"."BLOCK#"="E"."SEGBLOCK#")
- filter(("S"."TS#"="TS"."TS#" AND "S"."TS#"="F"."TS#" AND "S"."FILE#"="F"."RELFILE#"))
- 21 - access("O"."NAME"='AUD$')
- filter("O"."NAME"='AUD$')
- 23 - access("O"."OWNER#"="U"."USER#")
- 24 - filter(("S"."FILE#"="SO"."HEADER_FILE" AND "S"."BLOCK#"="SO"."HEADER_BLOCK" AND "S"."TS#"="SO"."TS_NUMBER" AND
- "S"."TYPE#"="SO"."SEGMENT_TYPE_ID" AND "O"."TYPE#"="SO"."OBJECT_TYPE_ID"))
- 26 - filter(("T"."BLOCK#"="E"."SEGBLOCK#" AND "T"."FILE#"="E"."SEGFILE#" AND "T"."TS#"="E"."TS#" AND BITAND("T"."PROPERTY",1024)=0))
- 27 - access("T"."OBJ#"="O"."OBJ#")
- 28 - filter(("TP"."BLOCK#"="E"."SEGBLOCK#" AND "TP"."FILE#"="E"."SEGFILE#" AND "TP"."TS#"="E"."TS#"))
- 29 - access("TP"."OBJ#"="O"."OBJ#")
- 30 - filter(("C"."BLOCK#"="E"."SEGBLOCK#" AND "C"."FILE#"="E"."SEGFILE#" AND "C"."TS#"="E"."TS#"))
- 31 - access("C"."OBJ#"="O"."OBJ#")
- 32 - filter(("I"."BLOCK#"="E"."SEGBLOCK#" AND "I"."FILE#"="E"."SEGFILE#" AND "I"."TS#"="E"."TS#" AND INTERNAL_FUNCTION("I"."TYPE#")))
- 33 - access("I"."OBJ#"="O"."OBJ#")
- 34 - filter(("IP"."BLOCK#"="E"."SEGBLOCK#" AND "IP"."FILE#"="E"."SEGFILE#" AND "IP"."TS#"="E"."TS#"))
- 35 - access("IP"."OBJ#"="O"."OBJ#")
- 36 - filter(("L"."BLOCK#"="E"."SEGBLOCK#" AND "L"."FILE#"="E"."SEGFILE#" AND "L"."TS#"="E"."TS#" AND (BITAND("L"."PROPERTY",64)=0 OR
- BITAND("L"."PROPERTY",128)=128)))
- 37 - access("L"."LOBJ#"="O"."OBJ#")
- 38 - filter(("TSP"."BLOCK#"="E"."SEGBLOCK#" AND "TSP"."FILE#"="E"."SEGFILE#" AND "TSP"."TS#"="E"."TS#"))
- 39 - access("TSP"."OBJ#"="O"."OBJ#")
- 40 - filter(("ISP"."FILE#"="E"."SEGFILE#" AND "ISP"."BLOCK#"="E"."SEGBLOCK#" AND "ISP"."TS#"="E"."TS#"))
- 41 - access("ISP"."OBJ#"="O"."OBJ#")
- 42 - filter(("LF"."BLOCK#"="E"."SEGBLOCK#" AND "LF"."FILE#"="E"."SEGFILE#" AND "LF"."TS#"="E"."TS#"))
- 43 - access("LF"."FRAGOBJ#"="O"."OBJ#")
- 49 - access("F"."TS#"="E"."TS#" AND "F"."RELFILE#"="E"."SEGFILE#")
- 51 - access("TS"."TS#"="E"."TS#")
- 52 - filter((INTERNAL_FUNCTION("S"."TYPE#") AND BITAND(NVL("S"."SPARE1",0),1)=0 AND BITAND(NVL("S"."SPARE1",0),65536)=0))
- 53 - access("S"."TS#"="E"."TS#" AND "S"."FILE#"="E"."SEGFILE#" AND "S"."BLOCK#"="E"."SEGBLOCK#")
- filter("S"."TS#"="TS"."TS#")
- 55 - access("S"."USER#"="U"."USER#")
- 56 - access("UN"."NAME"='AUD$')
- 57 - filter(("UN"."BLOCK#"="E"."SEGBLOCK#" AND "UN"."FILE#"="E"."SEGFILE#" AND "UN"."TS#"="E"."TS#" AND "UN"."STATUS$"<>1 AND
- "S"."FILE#"="UN"."FILE#" AND "S"."BLOCK#"="UN"."BLOCK#" AND "S"."TS#"="UN"."TS#" AND "UN"."TS#"="F"."TS#" AND "UN"."FILE#"="F"."RELFILE#"))
- 62 - access("F"."TS#"="E"."TS#" AND "F"."RELFILE#"="E"."SEGFILE#")
- 64 - access("TS"."TS#"="E"."TS#")
- 65 - filter(("S"."TYPE#"<>6 AND "S"."TYPE#"<>5 AND "S"."TYPE#"<>8 AND BITAND(NVL("S"."SPARE1",0),1)=0 AND BITAND(NVL("S"."SPARE1",0),65536)=0 AND
- "S"."TYPE#"<>10 AND "S"."TYPE#"<>1))
- 66 - access("S"."TS#"="E"."TS#" AND "S"."FILE#"="E"."SEGFILE#" AND "S"."BLOCK#"="E"."SEGBLOCK#")
- filter(("S"."TS#"="TS"."TS#" AND "S"."TS#"="F"."TS#" AND "S"."FILE#"="F"."RELFILE#" AND
- TO_CHAR("F"."FILE#")||'.'||TO_CHAR("S"."BLOCK#")='AUD$'))
- 68 - access("S"."USER#"="U"."USER#")
- 69 - access("E"."KTFBUESEGFNO"="DS"."RELATIVE_FNO" AND "E"."KTFBUESEGBNO"="DS"."HEADER_BLOCK" AND "E"."KTFBUESEGTSN"="DS"."TABLESPACE_ID" AND
- "E"."KTFBUEFNO"="F"."RELFILE#")
- 70 - access("DS"."TABLESPACE_ID"="F"."TS#")
- 79 - filter((BITAND(NVL("S"."SPARE1",0),1)=1 AND BITAND(NVL("S"."SPARE1",0),65536)=0))
- 80 - access("S"."TS#"="F"."TS#" AND "S"."FILE#"="F"."RELFILE#")
- 82 - access("S"."TS#"="TS"."TS#")
- 84 - access("O"."NAME"='AUD$')
- filter("O"."NAME"='AUD$')
- 86 - access("O"."OWNER#"="U"."USER#")
- 87 - filter(("S"."FILE#"="SO"."HEADER_FILE" AND "S"."BLOCK#"="SO"."HEADER_BLOCK" AND "S"."TS#"="SO"."TS_NUMBER" AND
- "S"."TYPE#"="SO"."SEGMENT_TYPE_ID" AND "O"."TYPE#"="SO"."OBJECT_TYPE_ID"))
- 89 - filter(BITAND("T"."PROPERTY",1024)=0)
- 90 - access("T"."OBJ#"="O"."OBJ#")
- 92 - access("TP"."OBJ#"="O"."OBJ#")
- 94 - access("C"."OBJ#"="O"."OBJ#")
- 95 - filter(("I"."TYPE#"=1 OR "I"."TYPE#"=2 OR "I"."TYPE#"=3 OR "I"."TYPE#"=4 OR "I"."TYPE#"=6 OR "I"."TYPE#"=7 OR "I"."TYPE#"=8 OR
- "I"."TYPE#"=9))
- 96 - access("I"."OBJ#"="O"."OBJ#")
- 98 - access("IP"."OBJ#"="O"."OBJ#")
- 99 - filter((BITAND("L"."PROPERTY",64)=0 OR BITAND("L"."PROPERTY",128)=128))
- 100 - access("L"."LOBJ#"="O"."OBJ#")
- 102 - access("TSP"."OBJ#"="O"."OBJ#")
- 104 - access("ISP"."OBJ#"="O"."OBJ#")
- 106 - access("LF"."FRAGOBJ#"="O"."OBJ#")
- 111 - filter("UN"."STATUS$"<>1)
- 112 - access("UN"."NAME"='AUD$')
- 113 - access("UN"."TS#"="F"."TS#" AND "UN"."FILE#"="F"."RELFILE#")
- 114 - filter((INTERNAL_FUNCTION("S"."TYPE#") AND BITAND(NVL("S"."SPARE1",0),1)=1 AND BITAND(NVL("S"."SPARE1",0),65536)=0))
- 115 - access("S"."TS#"="UN"."TS#" AND "S"."FILE#"="UN"."FILE#" AND "S"."BLOCK#"="UN"."BLOCK#")
- 117 - access("S"."TS#"="TS"."TS#")
- 119 - access("S"."USER#"="U"."USER#")
- 124 - filter(("S"."TYPE#"<>6 AND "S"."TYPE#"<>5 AND "S"."TYPE#"<>8 AND BITAND(NVL("S"."SPARE1",0),1)=1 AND BITAND(NVL("S"."SPARE1",0),65536)=0 AND
- "S"."TYPE#"<>10 AND "S"."TYPE#"<>1))
- 126 - access("S"."TS#"="TS"."TS#")
- 128 - access("S"."USER#"="U"."USER#")
- 129 - access("S"."TS#"="F"."TS#" AND "S"."FILE#"="F"."RELFILE#")
- 130 - filter(TO_CHAR("F"."FILE#")||'.'||TO_CHAR("S"."BLOCK#")='AUD$')
- 232 rows selected.
- Elapsed: 00:00:00.10
直接看id=131的那一行，时间都花在对固定表X$KTFBUE的全表扫描上，这个算是Oracle的一个BUG，当该固定表没有统计信息的时候，Oracle不会对他做动态采样，而是直接使用基数为100000的行。
查看索引的信息，固定表的索引有点奇怪：
- SYS@zkm1> select * from V$INDEXED_FIXED_COLUMN where table_name='X$KTFBUE';
- TABLE_NAME INDEX_NUMBER COLUMN_NAME COLUMN_POSITION
- ------------------------------ ------------ ------------------------------ ---------------
- X$KTFBUE 1 KTFBUESEGBNO 2
- X$KTFBUE 1 KTFBUESEGFNO 1
- X$KTFBUE 1 KTFBUESEGTSN 0
看不出啥。
百度或者mos上都可以查找到相关的原因和办法。
mos参考文档：Query Against DBA_EXTENTS Performs Slowly After Upgrade to 11.2.0.3 (Doc ID 1453425.1)
这篇文章有提供几种方法。
Gathering stats on the X$KTFBUE table using the following command:
EXEC DBMS_STATS.GATHER_TABLE_STATS('SYS', 'X$KTFBUE');For more information on gathering fixed table statistics see:
Document 798257.1 GATHER_FIXED_OBJECTS_STATS ConsiderationsOR
alter session set "_optimizer_cartesian_enabled" = false;OR
alter session set "_smm_auto_cost_enabled" = false;OR
Disable fix for unpublished Bug Bug 11814428: POOR CARDINALITY ESTIMATE FROM JOIN WITH A UNION-ALL VIEW:
alter session set "_FIX_CONTROL" = "11814428:0";
不过只有收集统计信息和最下边的BUG修复关掉才有效。
收集统计信息这个方法略过，因为还有一个表空间查询缓慢的问题和这个是一样的问题。
我们采用另外一种方法，关闭11814428的修复，执行：
- 20:30:19 SYS@anonymous> alter session set "_FIX_CONTROL" = "11814428:0";
- Session altered.
- Elapsed: 00:00:00.00
之后再次运行变快了：
- 20:30:21 SYS@anonymous> select owner,tablespace_name from dba_extents where segment_name='AUD$' group by owner,tablespace_name;
- OWNER TABLESPACE_NAME
- ------------------------------ ------------------------------
- SYS SYSTEM
- Elapsed: 00:00:00.33
可以发现执行计划对X$KTFBUE已经采用了索引：
- 20:30:28 SYS@anonymous> select * from table(dbms_xplan.display_cursor(null,null,'allstats last'));
- PLAN_TABLE_OUTPUT
- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- SQL_ID dggb0d96bj8dy, child number 5
- -------------------------------------
- select owner,tablespace_name from dba_extents where segment_name='AUD$'
- group by owner,tablespace_name
- Plan hash value: 381184789
- ------------------------------------------------------------------------------------------------------------------------------------------------------
- | Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | OMem | 1Mem | Used-Mem |
- ------------------------------------------------------------------------------------------------------------------------------------------------------
- | 0 | SELECT STATEMENT | | 1 | | 1 |00:00:00.01 | 719 | | | |
- | 1 | HASH GROUP BY | | 1 | 729 | 1 |00:00:00.01 | 719 | 1646K| 1646K| 497K (0)|
- | 2 | VIEW | DBA_EXTENTS | 1 | 729 | 259 |00:00:00.01 | 719 | | | |
- | 3 | UNION-ALL | | 1 | | 259 |00:00:00.01 | 719 | | | |
- | 4 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | | | |
- | 5 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | | | |
- | 6 | TABLE ACCESS FULL | UET$ | 1 | 1 | 0 |00:00:00.01 | 310 | | | |
- |* 7 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 8 | VIEW | SYS_DBA_SEGS | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 9 | UNION ALL PUSHED PREDICATE | | 0 | | 0 |00:00:00.01 | 0 | | | |
- | 10 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 11 | NESTED LOOPS OUTER | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 12 | MERGE JOIN CARTESIAN | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 13 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 14 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 15 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 16 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 17 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 18 | TABLE ACCESS CLUSTER | SEG$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 19 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 20 | BUFFER SORT | | 0 | 2 | 0 |00:00:00.01 | 0 | 73728 | 73728 | |
- |* 21 | INDEX SKIP SCAN | I_OBJ2 | 0 | 2 | 0 |00:00:00.01 | 0 | | | |
- | 22 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 23 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 24 | VIEW | SYS_OBJECTS | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 25 | UNION ALL PUSHED PREDICATE | | 0 | | 0 |00:00:00.01 | 0 | | | |
- |* 26 | TABLE ACCESS CLUSTER | TAB$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 27 | INDEX UNIQUE SCAN | I_OBJ# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 28 | TABLE ACCESS BY INDEX ROWID | TABPART$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 29 | INDEX UNIQUE SCAN | I_TABPART_OBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 30 | TABLE ACCESS CLUSTER | CLU$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 31 | INDEX UNIQUE SCAN | I_OBJ# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 32 | TABLE ACCESS BY INDEX ROWID | IND$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 33 | INDEX UNIQUE SCAN | I_IND1 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 34 | TABLE ACCESS BY INDEX ROWID | INDPART$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 35 | INDEX UNIQUE SCAN | I_INDPART_OBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 36 | TABLE ACCESS BY INDEX ROWID | LOB$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 37 | INDEX UNIQUE SCAN | I_LOB2 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 38 | TABLE ACCESS BY INDEX ROWID | TABSUBPART$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 39 | INDEX UNIQUE SCAN | I_TABSUBPART$_OBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 40 | TABLE ACCESS BY INDEX ROWID | INDSUBPART$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 41 | INDEX UNIQUE SCAN | I_INDSUBPART_OBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 42 | TABLE ACCESS BY INDEX ROWID | LOBFRAG$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 43 | INDEX UNIQUE SCAN | I_LOBFRAG$_FRAGOBJ$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 44 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 45 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 46 | NESTED LOOPS OUTER | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 47 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 48 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 49 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 50 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 51 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 52 | TABLE ACCESS CLUSTER | SEG$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 53 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 54 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 55 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 56 | INDEX RANGE SCAN | I_UNDO2 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 57 | TABLE ACCESS BY INDEX ROWID | UNDO$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 58 | NESTED LOOPS OUTER | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 59 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 60 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 61 | TABLE ACCESS BY INDEX ROWID | FILE$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 62 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 63 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 64 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 65 | TABLE ACCESS CLUSTER | SEG$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 66 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 67 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 68 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |* 69 | HASH JOIN | | 1 | 728 | 259 |00:00:00.01 | 409 | 1969K| 1969K| 1497K (0)|
- | 70 | INDEX FULL SCAN | I_FILE2 | 1 | 106 | 108 |00:00:00.01 | 1 | | | |
- | 71 | NESTED LOOPS | | 1 | 24769 | 259 |00:00:00.01 | 408 | | | |
- | 72 | VIEW | SYS_DBA_SEGS | 1 | 3 | 1 |00:00:00.01 | 401 | | | |
- | 73 | UNION-ALL | | 1 | | 1 |00:00:00.01 | 401 | | | |
- | 74 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 89 | | | |
- | 75 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 87 | | | |
- | 76 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 86 | | | |
- | 77 | NESTED LOOPS OUTER | | 1 | 1 | 1 |00:00:00.01 | 83 | | | |
- | 78 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 81 | | | |
- |* 79 | INDEX SKIP SCAN | I_OBJ2 | 1 | 2 | 1 |00:00:00.01 | 65 | | | |
- |* 80 | VIEW | SYS_OBJECTS | 1 | 1 | 1 |00:00:00.01 | 16 | | | |
- | 81 | UNION ALL PUSHED PREDICATE | | 1 | | 1 |00:00:00.01 | 16 | | | |
- |* 82 | TABLE ACCESS CLUSTER | TAB$ | 1 | 1 | 1 |00:00:00.01 | 3 | | | |
- |* 83 | INDEX UNIQUE SCAN | I_OBJ# | 1 | 1 | 1 |00:00:00.01 | 2 | | | |
- | 84 | TABLE ACCESS BY INDEX ROWID| TABPART$ | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- |* 85 | INDEX UNIQUE SCAN | I_TABPART_OBJ$ | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- | 86 | TABLE ACCESS CLUSTER | CLU$ | 1 | 1 | 0 |00:00:00.01 | 3 | | | |
- |* 87 | INDEX UNIQUE SCAN | I_OBJ# | 1 | 1 | 1 |00:00:00.01 | 2 | | | |
- |* 88 | TABLE ACCESS BY INDEX ROWID| IND$ | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- |* 89 | INDEX UNIQUE SCAN | I_IND1 | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- | 90 | TABLE ACCESS BY INDEX ROWID| INDPART$ | 1 | 1 | 0 |00:00:00.01 | 1 | | | |
- |* 91 | INDEX UNIQUE SCAN | I_INDPART_OBJ$ | 1 | 1 | 0 |00:00:00.01 | 1 | | | |
- |* 92 | TABLE ACCESS BY INDEX ROWID| LOB$ | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- |* 93 | INDEX UNIQUE SCAN | I_LOB2 | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- | 94 | TABLE ACCESS BY INDEX ROWID| TABSUBPART$ | 1 | 1 | 0 |00:00:00.01 | 1 | | | |
- |* 95 | INDEX UNIQUE SCAN | I_TABSUBPART$_OBJ$ | 1 | 1 | 0 |00:00:00.01 | 1 | | | |
- | 96 | TABLE ACCESS BY INDEX ROWID| INDSUBPART$ | 1 | 1 | 0 |00:00:00.01 | 1 | | | |
- |* 97 | INDEX UNIQUE SCAN | I_INDSUBPART_OBJ$ | 1 | 1 | 0 |00:00:00.01 | 1 | | | |
- | 98 | TABLE ACCESS BY INDEX ROWID| LOBFRAG$ | 1 | 1 | 0 |00:00:00.01 | 1 | | | |
- |* 99 | INDEX UNIQUE SCAN | I_LOBFRAG$_FRAGOBJ$ | 1 | 1 | 0 |00:00:00.01 | 1 | | | |
- | 100 | TABLE ACCESS CLUSTER | USER$ | 1 | 1 | 1 |00:00:00.01 | 2 | | | |
- |*101 | INDEX UNIQUE SCAN | I_USER# | 1 | 1 | 1 |00:00:00.01 | 1 | | | |
- |*102 | TABLE ACCESS CLUSTER | SEG$ | 1 | 1 | 1 |00:00:00.01 | 3 | | | |
- |*103 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 1 | 1 | 1 |00:00:00.01 | 2 | | | |
- |*104 | INDEX UNIQUE SCAN | I_FILE2 | 1 | 1 | 1 |00:00:00.01 | 1 | | | |
- | 105 | TABLE ACCESS CLUSTER | TS$ | 1 | 1 | 1 |00:00:00.01 | 2 | | | |
- |*106 | INDEX UNIQUE SCAN | I_TS# | 1 | 1 | 1 |00:00:00.01 | 1 | | | |
- | 107 | NESTED LOOPS OUTER | | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- | 108 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- | 109 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- | 110 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- |*111 | TABLE ACCESS BY INDEX ROWID | UNDO$ | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- |*112 | INDEX RANGE SCAN | I_UNDO2 | 1 | 1 | 0 |00:00:00.01 | 2 | | | |
- |*113 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*114 | TABLE ACCESS CLUSTER | SEG$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*115 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 116 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*117 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 118 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*119 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 120 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | | | |
- | 121 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | | | |
- | 122 | NESTED LOOPS OUTER | | 1 | 1 | 0 |00:00:00.01 | 310 | | | |
- | 123 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 310 | | | |
- |*124 | TABLE ACCESS FULL | SEG$ | 1 | 1 | 0 |00:00:00.01 | 310 | | | |
- | 125 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*126 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- | 127 | TABLE ACCESS CLUSTER | USER$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*128 | INDEX UNIQUE SCAN | I_USER# | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*129 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*130 | TABLE ACCESS BY INDEX ROWID | FILE$ | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
- |*131 | FIXED TABLE FIXED INDEX | X$KTFBUE (ind:1) | 1 | 8256 | 259 |00:00:00.01 | 7 | | | |
- ------------------------------------------------------------------------------------------------------------------------------------------------------
- Predicate Information (identified by operation id):
- ---------------------------------------------------
- 7 - access("E"."TS#"="F"."TS#" AND "E"."FILE#"="F"."RELFILE#")
- 15 - access("F"."TS#"="E"."TS#" AND "F"."RELFILE#"="E"."SEGFILE#")
- 17 - access("TS"."TS#"="E"."TS#")
- 18 - filter((BITAND(NVL("S"."SPARE1",0),1)=0 AND BITAND(NVL("S"."SPARE1",0),65536)=0))
- 19 - access("S"."TS#"="E"."TS#" AND "S"."FILE#"="E"."SEGFILE#" AND "S"."BLOCK#"="E"."SEGBLOCK#")
- filter(("S"."TS#"="TS"."TS#" AND "S"."TS#"="F"."TS#" AND "S"."FILE#"="F"."RELFILE#"))
- 21 - access("O"."NAME"='AUD$')
- filter("O"."NAME"='AUD$')
- 23 - access("O"."OWNER#"="U"."USER#")
- 24 - filter(("S"."FILE#"="SO"."HEADER_FILE" AND "S"."BLOCK#"="SO"."HEADER_BLOCK" AND "S"."TS#"="SO"."TS_NUMBER" AND
- "S"."TYPE#"="SO"."SEGMENT_TYPE_ID" AND "O"."TYPE#"="SO"."OBJECT_TYPE_ID"))
- 26 - filter(("T"."BLOCK#"="E"."SEGBLOCK#" AND "T"."FILE#"="E"."SEGFILE#" AND "T"."TS#"="E"."TS#" AND BITAND("T"."PROPERTY",1024)=0))
- 27 - access("T"."OBJ#"="O"."OBJ#")
- 28 - filter(("TP"."BLOCK#"="E"."SEGBLOCK#" AND "TP"."FILE#"="E"."SEGFILE#" AND "TP"."TS#"="E"."TS#"))
- 29 - access("TP"."OBJ#"="O"."OBJ#")
- 30 - filter(("C"."BLOCK#"="E"."SEGBLOCK#" AND "C"."FILE#"="E"."SEGFILE#" AND "C"."TS#"="E"."TS#"))
- 31 - access("C"."OBJ#"="O"."OBJ#")
- 32 - filter(("I"."BLOCK#"="E"."SEGBLOCK#" AND "I"."FILE#"="E"."SEGFILE#" AND "I"."TS#"="E"."TS#" AND INTERNAL_FUNCTION("I"."TYPE#")))
- 33 - access("I"."OBJ#"="O"."OBJ#")
- 34 - filter(("IP"."BLOCK#"="E"."SEGBLOCK#" AND "IP"."FILE#"="E"."SEGFILE#" AND "IP"."TS#"="E"."TS#"))
- 35 - access("IP"."OBJ#"="O"."OBJ#")
- 36 - filter(("L"."BLOCK#"="E"."SEGBLOCK#" AND "L"."FILE#"="E"."SEGFILE#" AND "L"."TS#"="E"."TS#" AND (BITAND("L"."PROPERTY",64)=0 OR
- BITAND("L"."PROPERTY",128)=128)))
- 37 - access("L"."LOBJ#"="O"."OBJ#")
- 38 - filter(("TSP"."BLOCK#"="E"."SEGBLOCK#" AND "TSP"."FILE#"="E"."SEGFILE#" AND "TSP"."TS#"="E"."TS#"))
- 39 - access("TSP"."OBJ#"="O"."OBJ#")
- 40 - filter(("ISP"."FILE#"="E"."SEGFILE#" AND "ISP"."BLOCK#"="E"."SEGBLOCK#" AND "ISP"."TS#"="E"."TS#"))
- 41 - access("ISP"."OBJ#"="O"."OBJ#")
- 42 - filter(("LF"."BLOCK#"="E"."SEGBLOCK#" AND "LF"."FILE#"="E"."SEGFILE#" AND "LF"."TS#"="E"."TS#"))
- 43 - access("LF"."FRAGOBJ#"="O"."OBJ#")
- 49 - access("F"."TS#"="E"."TS#" AND "F"."RELFILE#"="E"."SEGFILE#")
- 51 - access("TS"."TS#"="E"."TS#")
- 52 - filter((INTERNAL_FUNCTION("S"."TYPE#") AND BITAND(NVL("S"."SPARE1",0),1)=0 AND BITAND(NVL("S"."SPARE1",0),65536)=0))
- 53 - access("S"."TS#"="E"."TS#" AND "S"."FILE#"="E"."SEGFILE#" AND "S"."BLOCK#"="E"."SEGBLOCK#")
- filter("S"."TS#"="TS"."TS#")
- 55 - access("S"."USER#"="U"."USER#")
- 56 - access("UN"."NAME"='AUD$')
- 57 - filter(("UN"."BLOCK#"="E"."SEGBLOCK#" AND "UN"."FILE#"="E"."SEGFILE#" AND "UN"."TS#"="E"."TS#" AND "UN"."STATUS$"<>1 AND
- "S"."FILE#"="UN"."FILE#" AND "S"."BLOCK#"="UN"."BLOCK#" AND "S"."TS#"="UN"."TS#" AND "UN"."TS#"="F"."TS#" AND "UN"."FILE#"="F"."RELFILE#"))
- 62 - access("F"."TS#"="E"."TS#" AND "F"."RELFILE#"="E"."SEGFILE#")
- 64 - access("TS"."TS#"="E"."TS#")
- 65 - filter(("S"."TYPE#"<>6 AND "S"."TYPE#"<>5 AND "S"."TYPE#"<>8 AND BITAND(NVL("S"."SPARE1",0),1)=0 AND
- BITAND(NVL("S"."SPARE1",0),65536)=0 AND "S"."TYPE#"<>10 AND "S"."TYPE#"<>1))
- 66 - access("S"."TS#"="E"."TS#" AND "S"."FILE#"="E"."SEGFILE#" AND "S"."BLOCK#"="E"."SEGBLOCK#")
- filter(("S"."TS#"="TS"."TS#" AND "S"."TS#"="F"."TS#" AND "S"."FILE#"="F"."RELFILE#" AND
- TO_CHAR("F"."FILE#")||'.'||TO_CHAR("S"."BLOCK#")='AUD$'))
- 68 - access("S"."USER#"="U"."USER#")
- 69 - access("DS"."TABLESPACE_ID"="F"."TS#" AND "E"."KTFBUEFNO"="F"."RELFILE#")
- 79 - access("O"."NAME"='AUD$')
- filter("O"."NAME"='AUD$')
- 80 - filter("O"."TYPE#"="SO"."OBJECT_TYPE_ID")
- 82 - filter(BITAND("T"."PROPERTY",1024)=0)
- 83 - access("T"."OBJ#"="O"."OBJ#")
- 85 - access("TP"."OBJ#"="O"."OBJ#")
- 87 - access("C"."OBJ#"="O"."OBJ#")
- 88 - filter(("I"."TYPE#"=1 OR "I"."TYPE#"=2 OR "I"."TYPE#"=3 OR "I"."TYPE#"=4 OR "I"."TYPE#"=6 OR "I"."TYPE#"=7 OR "I"."TYPE#"=8 OR
- "I"."TYPE#"=9))
- 89 - access("I"."OBJ#"="O"."OBJ#")
- 91 - access("IP"."OBJ#"="O"."OBJ#")
- 92 - filter((BITAND("L"."PROPERTY",64)=0 OR BITAND("L"."PROPERTY",128)=128))
- 93 - access("L"."LOBJ#"="O"."OBJ#")
- 95 - access("TSP"."OBJ#"="O"."OBJ#")
- 97 - access("ISP"."OBJ#"="O"."OBJ#")
- 99 - access("LF"."FRAGOBJ#"="O"."OBJ#")
- 101 - access("O"."OWNER#"="U"."USER#")
- 102 - filter((BITAND(NVL("S"."SPARE1",0),1)=1 AND BITAND(NVL("S"."SPARE1",0),65536)=0 AND "S"."TYPE#"="SO"."SEGMENT_TYPE_ID"))
- 103 - access("S"."TS#"="SO"."TS_NUMBER" AND "S"."FILE#"="SO"."HEADER_FILE" AND "S"."BLOCK#"="SO"."HEADER_BLOCK")
- 104 - access("S"."TS#"="F"."TS#" AND "S"."FILE#"="F"."RELFILE#")
- 106 - access("S"."TS#"="TS"."TS#")
- 111 - filter("UN"."STATUS$"<>1)
- 112 - access("UN"."NAME"='AUD$')
- 113 - access("UN"."TS#"="F"."TS#" AND "UN"."FILE#"="F"."RELFILE#")
- 114 - filter((INTERNAL_FUNCTION("S"."TYPE#") AND BITAND(NVL("S"."SPARE1",0),1)=1 AND BITAND(NVL("S"."SPARE1",0),65536)=0))
- 115 - access("S"."TS#"="UN"."TS#" AND "S"."FILE#"="UN"."FILE#" AND "S"."BLOCK#"="UN"."BLOCK#")
- 117 - access("S"."TS#"="TS"."TS#")
- 119 - access("S"."USER#"="U"."USER#")
- 124 - filter(("S"."TYPE#"<>6 AND "S"."TYPE#"<>5 AND "S"."TYPE#"<>8 AND BITAND(NVL("S"."SPARE1",0),1)=1 AND
- BITAND(NVL("S"."SPARE1",0),65536)=0 AND "S"."TYPE#"<>10 AND "S"."TYPE#"<>1))
- 126 - access("S"."TS#"="TS"."TS#")
- 128 - access("S"."USER#"="U"."USER#")
- 129 - access("S"."TS#"="F"."TS#" AND "S"."FILE#"="F"."RELFILE#")
- 130 - filter(TO_CHAR("F"."FILE#")||'.'||TO_CHAR("S"."BLOCK#")='AUD$')
- 131 - filter(("E"."KTFBUESEGFNO"="DS"."RELATIVE_FNO" AND "E"."KTFBUESEGBNO"="DS"."HEADER_BLOCK" AND "E"."KTFBUESEGTSN"="DS"."TABLESPACE_ID"))
- 231 rows selected.
- Elapsed: 00:00:00.15
在查询表空间的时候，执行alter session set "_FIX_CONTROL" = "11814428:0";后，X$KTFBUE还是走全表扫描：
（表空间名字做处理）
- 20:32:05 SYS@eportdbi1> SELECT a.tablespace_name,
- 20:32:05 2 ROUND (a.bytes_alloc / 1024 / 1024, 2) megs_alloc,
- 20:32:05 3 ROUND (NVL (b.bytes_free, 0) / 1024 / 1024, 2) megs_free,
- 20:32:05 4 ROUND ((a.bytes_alloc - NVL (b.bytes_free, 0)) / 1024 / 1024, 2 ) megs_used,
- 20:32:05 5 ROUND ((NVL (b.bytes_free, 0) / a.bytes_alloc) * 100, 2) pct_free,
- 20:32:05 6 100 - ROUND ((NVL (b.bytes_free, 0) / a.bytes_alloc) * 100, 2) pct_used,
- 20:32:05 7 ROUND (maxbytes / 1048576, 2) MAX
- 20:32:05 8 FROM
- 20:32:05 9 (SELECT f.tablespace_name,
- 20:32:05 10 SUM (f.BYTES) bytes_alloc,
- 20:32:05 11 SUM (DECODE (f.autoextensible, 'YES', f.maxbytes, 'NO', f.BYTES ) ) maxbytes
- 20:32:05 12 FROM dba_data_files f
- 20:32:05 13 GROUP BY tablespace_name
- 20:32:05 14 ) a,
- 20:32:05 15 (SELECT f.tablespace_name,
- 20:32:05 16 SUM (f.BYTES) bytes_free
- 20:32:05 17 FROM dba_free_space f
- 20:32:05 18 GROUP BY tablespace_name
- 20:32:05 19 ) b
- 20:32:05 20 WHERE a.tablespace_name = b.tablespace_name(+)
- 20:32:05 21 UNION ALL
- 20:32:05 22 SELECT h.tablespace_name,
- 20:32:05 23 ROUND (SUM (h.bytes_free + h.bytes_used) / 1048576, 2) megs_alloc,
- 20:32:05 24 ROUND ( SUM ((h.bytes_free + h.bytes_used) - NVL (p.bytes_used, 0)) / 1048576, 2 ) megs_free,
- 20:32:05 25 ROUND (SUM (NVL (p.bytes_used, 0)) / 1048576, 2) megs_used,
- 20:32:05 26 ROUND ( ( SUM ( (h.bytes_free + h.bytes_used) - NVL (p.bytes_used, 0) ) / SUM (h.bytes_used + h.bytes_free) ) * 100, 2 ) pct_free,
- 20:32:05 27 100 - ROUND ( ( SUM ( (h.bytes_free + h.bytes_used) - NVL (p.bytes_used, 0) ) / SUM (h.bytes_used + h.bytes_free) ) * 100, 2 ) pct_used,
- 20:32:05 28 ROUND (SUM (f.maxbytes) / 1048576, 2) MAX
- 20:32:05 29 FROM SYS.v_$temp_space_header h,
- 20:32:05 30 SYS.v_$temp_extent_pool p,
- 20:32:05 31 dba_temp_files f
- 20:32:05 32 WHERE p.file_id(+) = h.file_id
- 20:32:06 33 AND p.tablespace_name(+) = h.tablespace_name
- 20:32:06 34 AND f.file_id = h.file_id
- 20:32:06 35 AND f.tablespace_name = h.tablespace_name
- 20:32:06 36 GROUP BY h.tablespace_name
- 20:32:06 37 ORDER BY 1 ;
- TABLESPACE_NAME MEGS_ALLOC MEGS_FREE MEGS_USED PCT_FREE PCT_USED MAX
- ------------------------------ ---------- ---------- ---------- ---------- ---------- ----------
- xxxxxxxxxxxxxxxx 4096 4019 77 98.12 1.88 4096
- xxxxxxxxxxxxxxxx 8192 2283 5909 27.87 72.13 8192
- xxxxxxxxxxxxxxxx 2048 1113 935 54.35 45.65 2048
- xxxxxxxxxxxxxxxx 24576 16092 8484 65.48 34.52 24576
- xxxxxxxxxxxxxxxx 4096 4095 1 99.98 .02 4096
- xxxxxxxxxxxxxxxx 8192 8187 5 99.94 .06 8192
- xxxxxxxxxxxxxxxx 4000 3373 627 84.33 15.67 4000
- xxxxxxxxxxxxxxxx 546304 346561 199743 63.44 36.56 546304
- xxxxxxxxxxxxxxxx 4096 2969 1127 72.49 27.51 4096
- xxxxxxxxxxxxxxxx 4096 4086 10 99.76 .24 4096
- xxxxxxxxxxxxxxxx 8192 3047 5145 37.19 62.81 8192
- xxxxxxxxxxxxxxxx 276608 77078 199530 27.87 72.13 276608
- xxxxxxxxxxxxxxxx 16384 8605 7779 52.52 47.48 16384
- xxxxxxxxxxxxxxxx 4096 2944 1152 71.88 28.12 4096
- xxxxxxxxxxxxxxxx 16384 3575 12809 21.82 78.18 16384
- xxxxxxxxxxxxxxxx 4096 1074 3022 26.22 73.78 4096
- xxxxxxxxxxxxxxxx 4096 4071 25 99.39 .61 4096
- xxxxxxxxxxxxxxxx 4096 3915 181 95.58 4.42 4096
- xxxxxxxxxxxxxxxx 16384 15984 400 97.56 2.44 16384
- xxxxxxxxxxxxxxxx 32760 8390.88 24369.13 25.61 74.39 32767.98
- xxxxxxxxxxxxxxxx 5360 34.13 5325.88 .64 99.36 32767.98
- xxxxxxxxxxxxxxxx 4096 2946 1150 71.92 28.08 4096
- xxxxxxxxxxxxxxxx 4096 4052 44 98.93 1.07 4096
- xxxxxxxxxxxxxxxx 20096 13860 6236 68.97 31.03 20096
- xxxxxxxxxxxxxxxx 16384 13068 3316 79.76 20.24 16384
- xxxxxxxxxxxxxxxx 208192 40933 167259 19.66 80.34 208192
- xxxxxxxxxxxxxxxx 20096 16143 3953 80.33 19.67 20096
- xxxxxxxxxxxxxxxx 2048 1898 150 92.68 7.32 2048
- xxxxxxxxxxxxxxxx 20096 16138 3958 80.3 19.7 20096
- xxxxxxxxxxxxxxxx 68096 13300 54796 19.53 80.47 68096
- xxxxxxxxxxxxxxxx 8192 8179 13 99.84 .16 8192
- xxxxxxxxxxxxxxxx 32767 31971 796 97.57 2.43 32767.98
- xxxxxxxxxxxxxxxx 10240 2371.75 7868.25 23.16 76.84 10240
- xxxxxxxxxxxxxxxx 10390 9292.25 1097.75 89.43 10.57 32767.98
- xxxxxxxxxxxxxxxx 4356.25 209.38 4146.88 4.81 95.19 32767.98
- 35 rows selected.
- Elapsed: 00:01:54.62
执行计划：
- 20:34:00 SYS@anonymous> select * from table(dbms_xplan.display_cursor(null,null,'allstats last'));
- PLAN_TABLE_OUTPUT
- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- SQL_ID 8ks58zbpgra00, child number 1
- -------------------------------------
- SELECT a.tablespace_name, ROUND (a.bytes_alloc / 1024 /
- 1024, 2) megs_alloc, ROUND (NVL (b.bytes_free, 0) / 1024 / 1024, 2)
- megs_free, ROUND ((a.bytes_alloc - NVL (b.bytes_free, 0)) /
- 1024 / 1024, 2 ) megs_used, ROUND ((NVL (b.bytes_free, 0) /
- a.bytes_alloc) * 100, 2) pct_free, 100 -
- ROUND ((NVL (b.bytes_free, 0) / a.bytes_alloc) * 100, 2) pct_used,
- ROUND (maxbytes / 1048576, 2) MAX FROM (SELECT
- f.tablespace_name, SUM (f.BYTES) bytes_alloc, SUM (DECODE
- (f.autoextensible, 'YES', f.maxbytes, 'NO', f.BYTES ) ) maxbytes FROM
- dba_data_files f GROUP BY tablespace_name ) a, (SELECT
- f.tablespace_name, SUM (f.BYTES) bytes_free FROM dba_free_space f
- GROUP BY tablespace_name ) b WHERE a.tablespace_name =
- b.tablespace_name(+) UNION ALL SELECT h.tablespace_name, ROUND (SUM
- (h.bytes_free + h.bytes_used) / 1048576, 2) megs_alloc,
- ROUND ( SUM ((h.bytes_free + h.bytes_used) - NVL (p.b
- Plan hash value: 2506036241
- ------------------------------------------------------------------------------------------------------------------------------------------------------------
- | Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | Reads | OMem | 1Mem | Used-Mem |
- ------------------------------------------------------------------------------------------------------------------------------------------------------------
- | 0 | SELECT STATEMENT | | 1 | | 35 |00:01:54.53 | 53354 | 4865 | | | |
- | 1 | SORT ORDER BY | | 1 | 3 | 35 |00:01:54.53 | 53354 | 4865 | 4096 | 4096 | 4096 (0)|
- | 2 | UNION-ALL | | 1 | | 35 |00:01:54.53 | 53354 | 4865 | | | |
- |* 3 | HASH JOIN OUTER | | 1 | 2 | 34 |00:01:54.18 | 53310 | 4865 | 1229K| 1229K| 1243K (0)|
- | 4 | VIEW | | 1 | 2 | 34 |00:00:00.66 | 444 | 0 | | | |
- | 5 | HASH GROUP BY | | 1 | 2 | 34 |00:00:00.66 | 444 | 0 | 941K| 941K| 1349K (0)|
- | 6 | VIEW | DBA_DATA_FILES | 1 | 2 | 108 |00:00:00.65 | 444 | 0 | | | |
- | 7 | UNION-ALL | | 1 | | 108 |00:00:00.65 | 444 | 0 | | | |
- | 8 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.57 | 112 | 0 | | | |
- | 9 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.57 | 112 | 0 | | | |
- | 10 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.57 | 112 | 0 | | | |
- |* 11 | FIXED TABLE FULL | X$KCCFN | 1 | 1 | 108 |00:00:00.57 | 0 | 0 | | | |
- |* 12 | TABLE ACCESS BY INDEX ROWID| FILE$ | 108 | 1 | 0 |00:00:00.01 | 112 | 0 | | | |
- |* 13 | INDEX UNIQUE SCAN | I_FILE1 | 108 | 1 | 108 |00:00:00.01 | 4 | 0 | | | |
- |* 14 | FIXED TABLE FIXED INDEX | X$KCCFE (ind:1) | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 15 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 16 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 17 | NESTED LOOPS | | 1 | 1 | 108 |00:00:00.08 | 332 | 0 | | | |
- | 18 | NESTED LOOPS | | 1 | 1 | 108 |00:00:00.08 | 220 | 0 | | | |
- | 19 | NESTED LOOPS | | 1 | 1 | 108 |00:00:00.01 | 220 | 0 | | | |
- | 20 | NESTED LOOPS | | 1 | 1 | 108 |00:00:00.01 | 108 | 0 | | | |
- |* 21 | FIXED TABLE FULL | X$KCCFN | 1 | 1 | 108 |00:00:00.01 | 0 | 0 | | | |
- |* 22 | FIXED TABLE FIXED INDEX | X$KTFBHC (ind:1) | 108 | 1 | 108 |00:00:00.01 | 108 | 0 | | | |
- |* 23 | TABLE ACCESS BY INDEX ROWID| FILE$ | 108 | 1 | 108 |00:00:00.01 | 112 | 0 | | | |
- |* 24 | INDEX UNIQUE SCAN | I_FILE1 | 108 | 1 | 108 |00:00:00.01 | 4 | 0 | | | |
- |* 25 | FIXED TABLE FIXED INDEX | X$KCCFE (ind:1) | 108 | 1 | 108 |00:00:00.08 | 0 | 0 | | | |
- | 26 | TABLE ACCESS CLUSTER | TS$ | 108 | 1 | 108 |00:00:00.01 | 112 | 0 | | | |
- |* 27 | INDEX UNIQUE SCAN | I_TS# | 108 | 1 | 108 |00:00:00.01 | 4 | 0 | | | |
- | 28 | VIEW | | 1 | 31 | 34 |00:01:53.52 | 52866 | 4865 | | | |
- | 29 | HASH GROUP BY | | 1 | 31 | 34 |00:01:53.52 | 52866 | 4865 | 9291K| 2834K| 1346K (0)|
- | 30 | VIEW | DBA_FREE_SPACE | 1 | 140 | 100K|00:01:53.50 | 52866 | 4865 | | | |
- | 31 | UNION-ALL | | 1 | | 100K|00:01:53.48 | 52866 | 4865 | | | |
- | 32 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 38 | 0 | | | |
- | 33 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 38 | 0 | | | |
- | 34 | TABLE ACCESS FULL | FET$ | 1 | 1 | 0 |00:00:00.01 | 38 | 0 | | | |
- |* 35 | TABLE ACCESS CLUSTER | TS$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 36 | INDEX UNIQUE SCAN | I_TS# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 37 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 38 | NESTED LOOPS | | 1 | 88 | 84440 |00:00:00.15 | 394 | 0 | | | |
- | 39 | NESTED LOOPS | | 1 | 88 | 84440 |00:00:00.06 | 390 | 0 | | | |
- |* 40 | TABLE ACCESS FULL | TS$ | 1 | 31 | 34 |00:00:00.01 | 38 | 0 | | | |
- |* 41 | FIXED TABLE FIXED INDEX | X$KTFBFE (ind:1) | 34 | 3 | 84440 |00:00:00.05 | 352 | 0 | | | |
- |* 42 | INDEX UNIQUE SCAN | I_FILE2 | 84440 | 1 | 84440 |00:00:00.06 | 4 | 0 | | | |
- |* 43 | HASH JOIN | | 1 | 50 | 16133 |00:01:53.30 | 52396 | 4865 | 2297K| 2297K| 2426K (0)|
- | 44 | NESTED LOOPS | | 1 | 50 | 16133 |00:01:53.29 | 52358 | 4865 | | | |
- |* 45 | HASH JOIN | | 1 | 808 | 16133 |00:01:53.26 | 52354 | 4865 | 1753K| 1753K| 1511K (0)|
- |* 46 | TABLE ACCESS FULL | RECYCLEBIN$ | 1 | 152 | 191 |00:00:00.01 | 4 | 0 | | | |
- | 47 | FIXED TABLE FULL | X$KTFBUE | 1 | 100K| 723K|00:01:52.95 | 52350 | 4865 | | | |
- |* 48 | INDEX UNIQUE SCAN | I_FILE2 | 16133 | 1 | 16133 |00:00:00.01 | 4 | 0 | | | |
- |* 49 | TABLE ACCESS FULL | TS$ | 1 | 31 | 34 |00:00:00.01 | 38 | 0 | | | |
- | 50 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 38 | 0 | | | |
- | 51 | NESTED LOOPS | | 1 | 1 | 0 |00:00:00.01 | 38 | 0 | | | |
- | 52 | MERGE JOIN CARTESIAN | | 1 | 425 | 0 |00:00:00.01 | 38 | 0 | | | |
- |* 53 | TABLE ACCESS FULL | TS$ | 1 | 3 | 0 |00:00:00.01 | 38 | 0 | | | |
- | 54 | BUFFER SORT | | 0 | 152 | 0 |00:00:00.01 | 0 | 0 | 73728 | 73728 | |
- |* 55 | TABLE ACCESS FULL | RECYCLEBIN$ | 0 | 152 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 56 | TABLE ACCESS CLUSTER | UET$ | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 57 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- |* 58 | INDEX UNIQUE SCAN | I_FILE2 | 0 | 1 | 0 |00:00:00.01 | 0 | 0 | | | |
- | 59 | HASH GROUP BY | | 1 | 1 | 1 |00:00:00.35 | 44 | 0 | 856K| 856K| 463K (0)|
- | 60 | NESTED LOOPS OUTER | | 1 | 1 | 1 |00:00:00.35 | 44 | 0 | | | |
- |* 61 | HASH JOIN | | 1 | 1 | 1 |00:00:00.35 | 42 | 0 | 1281K| 1281K| 402K (0)|
- | 62 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.35 | 3 | 0 | | | |
- | 63 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.35 | 1 | 0 | | | |
- | 64 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.35 | 0 | 0 | | | |
- |* 65 | FIXED TABLE FULL | X$KCCFN | 1 | 1 | 1 |00:00:00.34 | 0 | 0 | | | |
- |* 66 | FIXED TABLE FIXED INDEX | X$KCCTF (ind:1) | 1 | 1 | 1 |00:00:00.01 | 0 | 0 | | | |
- |* 67 | FIXED TABLE FIXED INDEX | X$KTFTHC (ind:1) | 1 | 1 | 1 |00:00:00.01 | 1 | 0 | | | |
- | 68 | TABLE ACCESS CLUSTER | TS$ | 1 | 1 | 1 |00:00:00.01 | 2 | 0 | | | |
- |* 69 | INDEX UNIQUE SCAN | I_TS# | 1 | 1 | 1 |00:00:00.01 | 1 | 0 | | | |
- | 70 | VIEW | V_$TEMP_SPACE_HEADER | 1 | 1 | 1 |00:00:00.01 | 39 | 0 | | | |
- | 71 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 39 | 0 | | | |
- |* 72 | TABLE ACCESS FULL | TS$ | 1 | 1 | 1 |00:00:00.01 | 38 | 0 | | | |
- |* 73 | FIXED TABLE FIXED INDEX | X$KTFTHC (ind:2) | 1 | 1 | 1 |00:00:00.01 | 1 | 0 | | | |
- |* 74 | VIEW PUSHED PREDICATE | V_$TEMP_EXTENT_POOL | 1 | 1 | 1 |00:00:00.01 | 2 | 0 | | | |
- | 75 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 2 | 0 | | | |
- |* 76 | TABLE ACCESS BY INDEX ROWID | TS$ | 1 | 1 | 1 |00:00:00.01 | 2 | 0 | | | |
- |* 77 | INDEX UNIQUE SCAN | I_TS1 | 1 | 1 | 1 |00:00:00.01 | 1 | 0 | | | |
- |* 78 | FIXED TABLE FIXED INDEX | X$KTSTFC (ind:1) | 1 | 1 | 1 |00:00:00.01 | 0 | 0 | | | |
- ------------------------------------------------------------------------------------------------------------------------------------------------------------
- Predicate Information (identified by operation id):
- ---------------------------------------------------
- 3 - access("A"."TABLESPACE_NAME"="B"."TABLESPACE_NAME")
- 11 - filter(("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND BITAND("FNFLG",4)<>4))
- 12 - filter("F"."SPARE1" IS NULL)
- 13 - access("FNFNO"="F"."FILE#")
- 14 - filter("FE"."FENUM"="F"."FILE#")
- 16 - access("F"."TS#"="TS"."TS#")
- 21 - filter(("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND BITAND("FNFLG",4)<>4))
- 22 - filter("FNFNO"="HC"."KTFBHCAFNO")
- 23 - filter("F"."SPARE1" IS NOT NULL)
- 24 - access("FNFNO"="F"."FILE#")
- 25 - filter("FE"."FENUM"="F"."FILE#")
- 27 - access("HC"."KTFBHCTSN"="TS"."TS#")
- 35 - filter("TS"."BITMAPPED"=0)
- 36 - access("TS"."TS#"="F"."TS#")
- 37 - access("F"."TS#"="FI"."TS#" AND "F"."FILE#"="FI"."RELFILE#")
- 40 - filter(("TS"."BITMAPPED"<>0 AND "TS"."CONTENTS$"=0 AND INTERNAL_FUNCTION("TS"."ONLINE$")))
- 41 - filter("TS"."TS#"="F"."KTFBFETSN")
- 42 - access("F"."KTFBFETSN"="FI"."TS#" AND "F"."KTFBFEFNO"="FI"."RELFILE#")
- 43 - access("TS"."TS#"="RB"."TS#")
- 45 - access("U"."KTFBUESEGTSN"="RB"."TS#" AND "U"."KTFBUESEGFNO"="RB"."FILE#" AND "U"."KTFBUESEGBNO"="RB"."BLOCK#")
- 46 - filter(("RB"."TS#" IS NOT NULL AND "RB"."FILE#" IS NOT NULL AND "RB"."BLOCK#" IS NOT NULL))
- 48 - access("RB"."TS#"="FI"."TS#" AND "U"."KTFBUEFNO"="FI"."RELFILE#")
- 49 - filter(("TS"."BITMAPPED"<>0 AND "TS"."CONTENTS$"=0 AND INTERNAL_FUNCTION("TS"."ONLINE$")))
- 53 - filter("TS"."BITMAPPED"=0)
- 55 - filter(("RB"."TS#" IS NOT NULL AND "RB"."FILE#" IS NOT NULL AND "RB"."BLOCK#" IS NOT NULL))
- 57 - access("U"."TS#"="RB"."TS#" AND "U"."SEGFILE#"="RB"."FILE#" AND "U"."SEGBLOCK#"="RB"."BLOCK#")
- filter("TS"."TS#"="U"."TS#")
- 58 - access("U"."TS#"="FI"."TS#" AND "U"."SEGFILE#"="FI"."RELFILE#")
- 61 - access("HC"."KTFTHCTFNO"="H"."FILE_ID" AND "TS"."NAME"="H"."TABLESPACE_NAME")
- 65 - filter(("V"."FNNAM" IS NOT NULL AND "V"."FNTYP"=7))
- 66 - filter(("TF"."TFDUP"<>0 AND BITAND("TF"."TFSTA",32)<>32 AND "V"."FNFNO"="TF"."TFNUM" AND "TF"."TFFNH"="V"."FNNUM"))
- 67 - filter("V"."FNFNO"="HC"."KTFTHCTFNO")
- 69 - access("HC"."KTFTHCTSN"="TS"."TS#")
- 72 - filter(("TS"."CONTENTS$"=1 AND "TS"."BITMAPPED"<>0 AND "TS"."ONLINE$"=1))
- 73 - filter(("HC"."KTFTHCCVAL"=0 AND "HC"."INST_ID"=USERENV('INSTANCE') AND "TS"."TS#"="HC"."KTFTHCTSN"))
- 74 - filter("P"."FILE_ID"="H"."FILE_ID")
- 76 - filter(("TS"."CONTENTS$"=1 AND "TS"."BITMAPPED"<>0 AND "TS"."ONLINE$"=1))
- 77 - access("TS"."NAME"="H"."TABLESPACE_NAME")
- 78 - filter(("FC"."INST_ID"=USERENV('INSTANCE') AND "TS"."TS#"="FC"."KTSTFCTSN"))
- 147 rows selected.
- Elapsed: 00:00:00.08
解决可以看我另外一篇博文：Oracle查询表空间使用率很慢
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