一个表空间使用率查询sql的优化
话不多说，直接上运行计划：
SQL> set lines 500;
SQL> set pagesize 9999;
SQL> set long 9999;
SQL> select * from table(dbms_xplan.display_cursor('41348610',null,'advanced')); PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
HASH_VALUE 41348610, child number 0
------------------------------------
SELECT D.TABLESPACE_NAME, SPACE "Total(M)", SPACE -
NVL(FREE_SPACE, 0) "USED(M)", ROUND((1 - NVL(FREE_SPACE, 0) /
SPACE) * 100, 2) "USED(%)", FREE_SPACE "FREE(M)" FROM
(SELECT TABLESPACE_NAME, ROUND(SUM(BYTES) / (1024 *
1024), 2) SPACE, SUM(BLOCKS) BLOCKS FROM
DBA_DATA_FILES GROUP BY TABLESPACE_NAME) D, (SELECT
TABLESPACE_NAME, ROUND(SUM(BYTES) / (1024 * 1024), 2)
FREE_SPACE FROM DBA_FREE_SPACE GROUP BY
TABLESPACE_NAME) F WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
UNION ALL --if have tempfile SELECT D.TABLESPACE_NAME, SPACE
"Total(M)", USED_SPACE "USED(M)", ROUND(NVL(USED_SPACE,
0) / SPACE * 100, 2) "USED(%)", NVL(FREE_SPACE, 0) "FREE(M)"
FROM (SELECT TABLESPACE_NAME, ROUND(SUM(BYTES) / (1024
* 1024), 2) SPACE, SUM(BLOCKS) BLOCKS FROM
DBA_TEMP_FILES GROUP BY T Plan hash value: 3967328987 ----------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
----------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 20 (100)| |
| 1 | SORT ORDER BY | | 3 | 178 | 19 (22)| 00:00:01 |
| 2 | UNION-ALL | | | | | |
|* 3 | HASH JOIN OUTER | | 2 | 120 | 16 (19)| 00:00:01 |
| 4 | VIEW | | 2 | 60 | 5 (20)| 00:00:01 |
| 5 | HASH GROUP BY | | 2 | 68 | 5 (20)| 00:00:01 |
| 6 | VIEW | DBA_DATA_FILES | 2 | 68 | 4 (0)| 00:00:01 |
| 7 | UNION-ALL | | | | | |
| 8 | NESTED LOOPS | | 1 | 356 | 2 (0)| 00:00:01 |
| 9 | NESTED LOOPS | | 1 | 341 | 1 (0)| 00:00:01 |
| 10 | NESTED LOOPS | | 1 | 328 | 1 (0)| 00:00:01 |
|* 11 | FIXED TABLE FULL | X$KCCFN | 1 | 310 | 0 (0)| |
|* 12 | TABLE ACCESS BY INDEX ROWID| FILE$ | 1 | 18 | 1 (0)| 00:00:01 |
|* 13 | INDEX UNIQUE SCAN | I_FILE1 | 1 | | 0 (0)| |
|* 14 | FIXED TABLE FIXED INDEX | X$KCCFE (ind:1) | 20 | 260 | 0 (0)| |
| 15 | TABLE ACCESS CLUSTER | TS$ | 1 | 15 | 1 (0)| 00:00:01 |
|* 16 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| |
| 17 | NESTED LOOPS | | 1 | 399 | 2 (0)| 00:00:01 |
| 18 | NESTED LOOPS | | 1 | 386 | 2 (0)| 00:00:01 |
| 19 | NESTED LOOPS | | 1 | 377 | 1 (0)| 00:00:01 |
| 20 | NESTED LOOPS | | 1 | 362 | 0 (0)| |
|* 21 | FIXED TABLE FULL | X$KCCFN | 1 | 310 | 0 (0)| |
|* 22 | FIXED TABLE FIXED INDEX | X$KTFBHC (ind:1) | 1 | 52 | 0 (0)| |
| 23 | TABLE ACCESS CLUSTER | TS$ | 1 | 15 | 1 (0)| 00:00:01 |
|* 24 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| |
|* 25 | TABLE ACCESS BY INDEX ROWID | FILE$ | 1 | 9 | 1 (0)| 00:00:01 |
|* 26 | INDEX UNIQUE SCAN | I_FILE1 | 1 | | 0 (0)| |
|* 27 | FIXED TABLE FIXED INDEX | X$KCCFE (ind:1) | 20 | 260 | 0 (0)| |
| 28 | VIEW | | 5 | 150 | 11 (19)| 00:00:01 |
| 29 | HASH GROUP BY | | 5 | 105 | 11 (19)| 00:00:01 |
| 30 | VIEW | DBA_FREE_SPACE | 79 | 1659 | 10 (10)| 00:00:01 |
| 31 | UNION-ALL | | | | | |
| 32 | NESTED LOOPS | | 1 | 64 | 1 (0)| 00:00:01 |
| 33 | NESTED LOOPS | | 1 | 45 | 1 (0)| 00:00:01 |
| 34 | INDEX FULL SCAN | I_FILE2 | 5 | 30 | 1 (0)| 00:00:01 |
|* 35 | TABLE ACCESS CLUSTER | FET$ | 1 | 39 | 0 (0)| |
|* 36 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| |
|* 37 | TABLE ACCESS CLUSTER | TS$ | 1 | 19 | 0 (0)| |
|* 38 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| |
| 39 | NESTED LOOPS | | 76 | 5320 | 4 (0)| 00:00:01 |
| 40 | NESTED LOOPS | | 76 | 4864 | 4 (0)| 00:00:01 |
|* 41 | TABLE ACCESS FULL | TS$ | 5 | 125 | 4 (0)| 00:00:01 |
|* 42 | FIXED TABLE FIXED INDEX | X$KTFBFE (ind:1) | 17 | 663 | 0 (0)| |
|* 43 | INDEX UNIQUE SCAN | I_FILE2 | 1 | 6 | 0 (0)| |
| 44 | NESTED LOOPS | | 1 | 135 | 2 (50)| 00:00:01 |
| 45 | NESTED LOOPS | | 1 | 70 | 1 (0)| 00:00:01 |
| 46 | NESTED LOOPS | | 1 | 45 | 1 (0)| 00:00:01 |
| 47 | INDEX FULL SCAN | I_FILE2 | 5 | 30 | 1 (0)| 00:00:01 |
| 48 | TABLE ACCESS BY INDEX ROWID| RECYCLEBIN$ | 1 | 39 | 0 (0)| |
|* 49 | INDEX RANGE SCAN | RECYCLEBIN$_TS | 1 | | 0 (0)| |
|* 50 | TABLE ACCESS CLUSTER | TS$ | 1 | 25 | 0 (0)| |
|* 51 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| |
|* 52 | FIXED TABLE FIXED INDEX | X$KTFBUE (ind:1) | 1 | 65 | 1 (100)| 00:00:01 |
| 53 | NESTED LOOPS | | 1 | 116 | 3 (0)| 00:00:01 |
| 54 | NESTED LOOPS | | 1 | 97 | 3 (0)| 00:00:01 |
| 55 | MERGE JOIN CARTESIAN | | 1 | 45 | 3 (0)| 00:00:01 |
| 56 | TABLE ACCESS FULL | RECYCLEBIN$ | 1 | 39 | 2 (0)| 00:00:01 |
| 57 | BUFFER SORT | | 5 | 30 | 1 (0)| 00:00:01 |
| 58 | INDEX FULL SCAN | I_FILE2 | 5 | 30 | 1 (0)| 00:00:01 |
| 59 | TABLE ACCESS CLUSTER | UET$ | 1 | 52 | 0 (0)| |
|* 60 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 1 | | 0 (0)| |
|* 61 | TABLE ACCESS CLUSTER | TS$ | 1 | 19 | 0 (0)| |
|* 62 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| |
| 63 | NESTED LOOPS OUTER | | 1 | 58 | 3 (34)| 00:00:01 |
| 64 | VIEW | | 1 | 30 | 2 (50)| 00:00:01 |
| 65 | HASH GROUP BY | | 1 | 416 | 2 (50)| 00:00:01 |
| 66 | NESTED LOOPS | | 1 | 416 | 1 (0)| 00:00:01 |
| 67 | NESTED LOOPS | | 1 | 364 | 1 (0)| 00:00:01 |
| 68 | NESTED LOOPS | | 1 | 349 | 0 (0)| |
|* 69 | FIXED TABLE FULL | X$KCCFN | 1 | 297 | 0 (0)| |
|* 70 | FIXED TABLE FIXED INDEX | X$KTFTHC (ind:1) | 1 | 52 | 0 (0)| |
| 71 | TABLE ACCESS CLUSTER | TS$ | 1 | 15 | 1 (0)| 00:00:01 |
|* 72 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| |
|* 73 | FIXED TABLE FIXED INDEX | X$KCCTF (ind:1) | 1 | 52 | 0 (0)| |
| 74 | VIEW PUSHED PREDICATE | | 1 | 28 | 1 (0)| 00:00:01 |
| 75 | SORT GROUP BY | | 1 | 90 | 1 (0)| 00:00:01 |
| 76 | NESTED LOOPS | | 1 | 90 | 1 (0)| 00:00:01 |
|* 77 | TABLE ACCESS BY INDEX ROWID | TS$ | 1 | 25 | 1 (0)| 00:00:01 |
|* 78 | INDEX UNIQUE SCAN | I_TS1 | 1 | | 0 (0)| |
|* 79 | FIXED TABLE FIXED INDEX | X$KTFTHC (ind:2) | 1 | 65 | 0 (0)| |
---------------------------------------------------------------------------------------------------------- Query Block Name / Object Alias (identified by operation id):
------------------------------------------------------------- 1 - SET$1
3 - SEL$1
4 - SEL$2 / D@SEL$1
5 - SEL$2
6 - SET$2 / DBA_DATA_FILES@SEL$2
7 - SET$2
8 - SEL$C8360722
11 - SEL$C8360722 / X$KCCFN@SEL$5
12 - SEL$C8360722 / F@SEL$3
13 - SEL$C8360722 / F@SEL$3
14 - SEL$C8360722 / FE@SEL$3
15 - SEL$C8360722 / TS@SEL$3
16 - SEL$C8360722 / TS@SEL$3
17 - SEL$A731BD80
21 - SEL$A731BD80 / X$KCCFN@SEL$8
22 - SEL$A731BD80 / HC@SEL$6
23 - SEL$A731BD80 / TS@SEL$6
24 - SEL$A731BD80 / TS@SEL$6
25 - SEL$A731BD80 / F@SEL$6
26 - SEL$A731BD80 / F@SEL$6
27 - SEL$A731BD80 / FE@SEL$6
28 - SEL$9 / F@SEL$1
29 - SEL$9
30 - SET$3 / DBA_FREE_SPACE@SEL$9
31 - SET$3
32 - SEL$10
34 - SEL$10 / FI@SEL$10
35 - SEL$10 / F@SEL$10
36 - SEL$10 / F@SEL$10
37 - SEL$10 / TS@SEL$10
38 - SEL$10 / TS@SEL$10
39 - SEL$11
41 - SEL$11 / TS@SEL$11
42 - SEL$11 / F@SEL$11
43 - SEL$11 / FI@SEL$11
44 - SEL$12
47 - SEL$12 / FI@SEL$12
48 - SEL$12 / RB@SEL$12
49 - SEL$12 / RB@SEL$12
50 - SEL$12 / TS@SEL$12
51 - SEL$12 / TS@SEL$12
52 - SEL$12 / U@SEL$12
53 - SEL$13
56 - SEL$13 / RB@SEL$13
58 - SEL$13 / FI@SEL$13
59 - SEL$13 / U@SEL$13
60 - SEL$13 / U@SEL$13
61 - SEL$13 / TS@SEL$13
62 - SEL$13 / TS@SEL$13
63 - SEL$14
64 - SEL$29F99543 / D@SEL$14
65 - SEL$29F99543
69 - SEL$29F99543 / V@SEL$16
70 - SEL$29F99543 / HC@SEL$16
71 - SEL$29F99543 / TS@SEL$16
72 - SEL$29F99543 / TS@SEL$16
73 - SEL$29F99543 / TF@SEL$16
74 - SEL$ADB656C7 / F@SEL$14
75 - SEL$ADB656C7
77 - SEL$ADB656C7 / TS@SEL$19
78 - SEL$ADB656C7 / TS@SEL$19
79 - SEL$ADB656C7 / HC@SEL$19 Outline Data
------------- /*+
BEGIN_OUTLINE_DATA
IGNORE_OPTIM_EMBEDDED_HINTS
OPTIMIZER_FEATURES_ENABLE('11.2.0.4')
DB_VERSION('11.2.0.4')
ALL_ROWS
OUTLINE_LEAF(@"SEL$C8360722")
MERGE(@"SEL$7286615E")
OUTLINE_LEAF(@"SEL$A731BD80")
MERGE(@"SEL$8A3193DA")
OUTLINE_LEAF(@"SET$2")
OUTLINE_LEAF(@"SEL$2")
OUTLINE_LEAF(@"SEL$10")
OUTLINE_LEAF(@"SEL$11")
OUTLINE_LEAF(@"SEL$12")
OUTLINE_LEAF(@"SEL$13")
OUTLINE_LEAF(@"SET$3")
OUTLINE_LEAF(@"SEL$9")
OUTLINE_LEAF(@"SEL$1")
OUTLINE_LEAF(@"SEL$29F99543")
MERGE(@"SEL$16")
OUTLINE_LEAF(@"SEL$ADB656C7")
PUSH_PRED(@"SEL$14" "F"@"SEL$14" 1)
OUTLINE_LEAF(@"SEL$14")
OUTLINE_LEAF(@"SET$1")
OUTLINE(@"SEL$3")
OUTLINE(@"SEL$7286615E")
MERGE(@"SEL$5")
OUTLINE(@"SEL$6")
OUTLINE(@"SEL$8A3193DA")
MERGE(@"SEL$8")
OUTLINE(@"SEL$15")
OUTLINE(@"SEL$16")
OUTLINE(@"SEL$E9CE8D49")
MERGE(@"SEL$07C48A2D")
OUTLINE(@"SEL$14")
OUTLINE(@"SEL$4")
OUTLINE(@"SEL$5")
OUTLINE(@"SEL$7")
OUTLINE(@"SEL$8")
OUTLINE(@"SEL$17")
OUTLINE(@"SEL$07C48A2D")
MERGE(@"SEL$19")
OUTLINE(@"SEL$18")
OUTLINE(@"SEL$19")
NO_ACCESS(@"SEL$14" "D"@"SEL$14")
NO_ACCESS(@"SEL$14" "F"@"SEL$14")
LEADING(@"SEL$14" "D"@"SEL$14" "F"@"SEL$14")
USE_NL(@"SEL$14" "F"@"SEL$14")
NO_ACCESS(@"SEL$1" "D"@"SEL$1")
NO_ACCESS(@"SEL$1" "F"@"SEL$1")
LEADING(@"SEL$1" "D"@"SEL$1" "F"@"SEL$1")
USE_HASH(@"SEL$1" "F"@"SEL$1")
NO_ACCESS(@"SEL$2" "DBA_DATA_FILES"@"SEL$2")
USE_HASH_AGGREGATION(@"SEL$2")
NO_ACCESS(@"SEL$9" "DBA_FREE_SPACE"@"SEL$9")
USE_HASH_AGGREGATION(@"SEL$9")
FULL(@"SEL$13" "RB"@"SEL$13")
INDEX(@"SEL$13" "FI"@"SEL$13" ("FILE$"."TS#" "FILE$"."RELFILE#"))
INDEX(@"SEL$13" "U"@"SEL$13" "I_FILE#_BLOCK#")
INDEX(@"SEL$13" "TS"@"SEL$13" "I_TS#")
LEADING(@"SEL$13" "RB"@"SEL$13" "FI"@"SEL$13" "U"@"SEL$13" "TS"@"SEL$13")
USE_MERGE_CARTESIAN(@"SEL$13" "FI"@"SEL$13")
USE_NL(@"SEL$13" "U"@"SEL$13")
USE_NL(@"SEL$13" "TS"@"SEL$13")
INDEX(@"SEL$12" "FI"@"SEL$12" ("FILE$"."TS#" "FILE$"."RELFILE#"))
INDEX_RS_ASC(@"SEL$12" "RB"@"SEL$12" ("RECYCLEBIN$"."TS#"))
INDEX(@"SEL$12" "TS"@"SEL$12" "I_TS#")
FULL(@"SEL$12" "U"@"SEL$12")
LEADING(@"SEL$12" "FI"@"SEL$12" "RB"@"SEL$12" "TS"@"SEL$12" "U"@"SEL$12")
USE_NL(@"SEL$12" "RB"@"SEL$12")
USE_NL(@"SEL$12" "TS"@"SEL$12")
USE_NL(@"SEL$12" "U"@"SEL$12")
FULL(@"SEL$11" "TS"@"SEL$11")
FULL(@"SEL$11" "F"@"SEL$11")
INDEX(@"SEL$11" "FI"@"SEL$11" ("FILE$"."TS#" "FILE$"."RELFILE#"))
LEADING(@"SEL$11" "TS"@"SEL$11" "F"@"SEL$11" "FI"@"SEL$11")
USE_NL(@"SEL$11" "F"@"SEL$11")
USE_NL(@"SEL$11" "FI"@"SEL$11")
INDEX(@"SEL$10" "FI"@"SEL$10" ("FILE$"."TS#" "FILE$"."RELFILE#"))
INDEX(@"SEL$10" "F"@"SEL$10" "I_TS#")
INDEX(@"SEL$10" "TS"@"SEL$10" "I_TS#")
LEADING(@"SEL$10" "FI"@"SEL$10" "F"@"SEL$10" "TS"@"SEL$10")
USE_NL(@"SEL$10" "F"@"SEL$10")
USE_NL(@"SEL$10" "TS"@"SEL$10")
FULL(@"SEL$A731BD80" "X$KCCFN"@"SEL$8")
FULL(@"SEL$A731BD80" "HC"@"SEL$6")
INDEX(@"SEL$A731BD80" "TS"@"SEL$6" "I_TS#")
INDEX_RS_ASC(@"SEL$A731BD80" "F"@"SEL$6" ("FILE$"."FILE#"))
FULL(@"SEL$A731BD80" "FE"@"SEL$6")
LEADING(@"SEL$A731BD80" "X$KCCFN"@"SEL$8" "HC"@"SEL$6" "TS"@"SEL$6" "F"@"SEL$6" "FE"@"SEL$6")
USE_NL(@"SEL$A731BD80" "HC"@"SEL$6")
USE_NL(@"SEL$A731BD80" "TS"@"SEL$6")
USE_NL(@"SEL$A731BD80" "F"@"SEL$6")
USE_NL(@"SEL$A731BD80" "FE"@"SEL$6")
FULL(@"SEL$C8360722" "X$KCCFN"@"SEL$5")
INDEX_RS_ASC(@"SEL$C8360722" "F"@"SEL$3" ("FILE$"."FILE#"))
FULL(@"SEL$C8360722" "FE"@"SEL$3")
INDEX(@"SEL$C8360722" "TS"@"SEL$3" "I_TS#")
LEADING(@"SEL$C8360722" "X$KCCFN"@"SEL$5" "F"@"SEL$3" "FE"@"SEL$3" "TS"@"SEL$3")
USE_NL(@"SEL$C8360722" "F"@"SEL$3")
USE_NL(@"SEL$C8360722" "FE"@"SEL$3")
USE_NL(@"SEL$C8360722" "TS"@"SEL$3")
FULL(@"SEL$29F99543" "V"@"SEL$16")
FULL(@"SEL$29F99543" "HC"@"SEL$16")
INDEX(@"SEL$29F99543" "TS"@"SEL$16" "I_TS#")
FULL(@"SEL$29F99543" "TF"@"SEL$16")
LEADING(@"SEL$29F99543" "V"@"SEL$16" "HC"@"SEL$16" "TS"@"SEL$16" "TF"@"SEL$16")
USE_NL(@"SEL$29F99543" "HC"@"SEL$16")
USE_NL(@"SEL$29F99543" "TS"@"SEL$16")
USE_NL(@"SEL$29F99543" "TF"@"SEL$16")
USE_HASH_AGGREGATION(@"SEL$29F99543")
INDEX_RS_ASC(@"SEL$ADB656C7" "TS"@"SEL$19" ("TS$"."NAME"))
FULL(@"SEL$ADB656C7" "HC"@"SEL$19")
LEADING(@"SEL$ADB656C7" "TS"@"SEL$19" "HC"@"SEL$19")
USE_NL(@"SEL$ADB656C7" "HC"@"SEL$19")
END_OUTLINE_DATA
*/ Predicate Information (identified by operation id):
--------------------------------------------------- 3 - access("D"."TABLESPACE_NAME"="F"."TABLESPACE_NAME")
11 - filter(("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND
BITAND("FNFLG",4)<>4))
12 - filter("F"."SPARE1" IS NULL)
13 - access("FNFNO"="F"."FILE#")
14 - filter("FE"."FENUM"="F"."FILE#")
16 - access("F"."TS#"="TS"."TS#")
21 - filter(("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND
BITAND("FNFLG",4)<>4))
22 - filter("FNFNO"="HC"."KTFBHCAFNO")
24 - access("HC"."KTFBHCTSN"="TS"."TS#")
25 - filter("F"."SPARE1" IS NOT NULL)
26 - access("FNFNO"="F"."FILE#")
27 - filter("FE"."FENUM"="F"."FILE#")
35 - filter("F"."FILE#"="FI"."RELFILE#")
36 - access("F"."TS#"="FI"."TS#")
37 - filter("TS"."BITMAPPED"=0)
38 - access("TS"."TS#"="F"."TS#")
41 - filter(("TS"."CONTENTS$"=0 AND "TS"."BITMAPPED"<>0 AND INTERNAL_FUNCTION("TS"."ONLINE$")))
42 - filter("TS"."TS#"="F"."KTFBFETSN")
43 - access("F"."KTFBFETSN"="FI"."TS#" AND "F"."KTFBFEFNO"="FI"."RELFILE#")
49 - access("RB"."TS#"="FI"."TS#")
50 - filter(("TS"."CONTENTS$"=0 AND "TS"."BITMAPPED"<>0 AND INTERNAL_FUNCTION("TS"."ONLINE$")))
51 - access("TS"."TS#"="RB"."TS#")
52 - filter(("U"."KTFBUEFNO"="FI"."RELFILE#" AND "U"."KTFBUESEGTSN"="RB"."TS#" AND
"U"."KTFBUESEGFNO"="RB"."FILE#" AND "U"."KTFBUESEGBNO"="RB"."BLOCK#"))
60 - access("U"."TS#"="RB"."TS#" AND "U"."SEGFILE#"="RB"."FILE#" AND
"U"."SEGBLOCK#"="RB"."BLOCK#")
filter(("U"."TS#"="FI"."TS#" AND "U"."SEGFILE#"="FI"."RELFILE#"))
61 - filter("TS"."BITMAPPED"=0)
62 - access("TS"."TS#"="U"."TS#")
69 - filter(("V"."FNNAM" IS NOT NULL AND "V"."FNTYP"=7))
70 - filter("V"."FNFNO"="HC"."KTFTHCTFNO")
72 - access("HC"."KTFTHCTSN"="TS"."TS#")
73 - filter(("TF"."TFDUP"<>0 AND BITAND("TF"."TFSTA",32)<>32 AND "V"."FNFNO"="TF"."TFNUM" AND
"TF"."TFFNH"="V"."FNNUM"))
77 - filter(("TS"."CONTENTS$"=1 AND "TS"."BITMAPPED"<>0 AND "TS"."ONLINE$"=1))
78 - access("TS"."NAME"="D"."TABLESPACE_NAME")
79 - filter(("HC"."KTFTHCCVAL"=0 AND "HC"."INST_ID"=USERENV('INSTANCE') AND
"TS"."TS#"="HC"."KTFTHCTSN")) Column Projection Information (identified by operation id):
----------------------------------------------------------- 1 - (#keys=1) STRDEF[22], STRDEF[30], STRDEF[22], STRDEF[22], STRDEF[22]
2 - STRDEF[30], STRDEF[22], STRDEF[22], STRDEF[22], STRDEF[22]
3 - (#keys=1) "D"."TABLESPACE_NAME"[VARCHAR2,30], "SPACE"[NUMBER,22], "FREE_SPACE"[NUMBER,22]
4 - "D"."TABLESPACE_NAME"[VARCHAR2,30], "SPACE"[NUMBER,22]
5 - "TABLESPACE_NAME"[VARCHAR2,30], SUM("BLOCKS")[22], SUM("BYTES")[22]
6 - "TABLESPACE_NAME"[VARCHAR2,30], "BYTES"[NUMBER,22], "BLOCKS"[NUMBER,22]
7 - STRDEF[30], STRDEF[22], STRDEF[22]
8 - "F"."BLOCKS"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
9 - "F"."BLOCKS"[NUMBER,22], "F"."TS#"[NUMBER,22]
10 - "F"."FILE#"[NUMBER,22], "F"."BLOCKS"[NUMBER,22], "F"."TS#"[NUMBER,22]
11 - "INST_ID"[NUMBER,22], "FNTYP"[NUMBER,22], "FNFNO"[NUMBER,22], "FNFLG"[NUMBER,22],
"FNNAM"[VARCHAR2,513]
12 - "F"."FILE#"[NUMBER,22], "F"."BLOCKS"[NUMBER,22], "F"."TS#"[NUMBER,22]
13 - "F".ROWID[ROWID,10], "F"."FILE#"[NUMBER,22]
14 - "FE"."FENUM"[NUMBER,22]
15 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."BLOCKSIZE"[NUMBER,22]
16 - "TS".ROWID[ROWID,10]
17 - "HC"."KTFBHCSZ"[NUMBER,22], "HC"."KTFBHCCVAL"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."BLOCKSIZE"[NUMBER,22]
18 - "HC"."KTFBHCSZ"[NUMBER,22], "HC"."KTFBHCCVAL"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."BLOCKSIZE"[NUMBER,22], "F"."FILE#"[NUMBER,22]
19 - "FNFNO"[NUMBER,22], "HC"."KTFBHCSZ"[NUMBER,22], "HC"."KTFBHCCVAL"[NUMBER,22],
"TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
20 - "FNFNO"[NUMBER,22], "HC"."KTFBHCTSN"[NUMBER,22], "HC"."KTFBHCSZ"[NUMBER,22],
"HC"."KTFBHCCVAL"[NUMBER,22]
21 - "INST_ID"[NUMBER,22], "FNTYP"[NUMBER,22], "FNFNO"[NUMBER,22], "FNFLG"[NUMBER,22],
"FNNAM"[VARCHAR2,513]
22 - "HC"."KTFBHCAFNO"[NUMBER,22], "HC"."KTFBHCTSN"[NUMBER,22], "HC"."KTFBHCSZ"[NUMBER,22],
"HC"."KTFBHCCVAL"[NUMBER,22]
23 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."BLOCKSIZE"[NUMBER,22]
24 - "TS".ROWID[ROWID,10]
25 - "F"."FILE#"[NUMBER,22]
26 - "F".ROWID[ROWID,10], "F"."FILE#"[NUMBER,22]
27 - "FE"."FENUM"[NUMBER,22]
28 - "F"."TABLESPACE_NAME"[VARCHAR2,30], "FREE_SPACE"[NUMBER,22]
29 - "TABLESPACE_NAME"[VARCHAR2,30], SUM("BYTES")[22]
30 - "TABLESPACE_NAME"[VARCHAR2,30], "BYTES"[NUMBER,22]
31 - STRDEF[30], STRDEF[22]
32 - "F"."LENGTH"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
33 - "F"."TS#"[NUMBER,22], "F"."LENGTH"[NUMBER,22]
34 - "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
35 - "F".ROWID[ROWID,10], "F"."TS#"[NUMBER,22], "F"."FILE#"[NUMBER,22], "F"."LENGTH"[NUMBER,22]
36 - "F".ROWID[ROWID,10]
37 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."BLOCKSIZE"[NUMBER,22], "TS"."BITMAPPED"[NUMBER,22]
38 - "TS".ROWID[ROWID,10]
39 - "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22], "F"."KTFBFEBLKS"[NUMBER,22]
40 - "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22], "F"."KTFBFETSN"[NUMBER,22],
"F"."KTFBFEFNO"[NUMBER,22], "F"."KTFBFEBLKS"[NUMBER,22]
41 - "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
42 - "F"."KTFBFETSN"[NUMBER,22], "F"."KTFBFEFNO"[NUMBER,22], "F"."KTFBFEBLKS"[NUMBER,22]
44 - "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22], "U"."KTFBUEBLKS"[NUMBER,22]
45 - "FI"."RELFILE#"[NUMBER,22], "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22],
"RB"."BLOCK#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
46 - "FI"."RELFILE#"[NUMBER,22], "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22],
"RB"."BLOCK#"[NUMBER,22]
47 - "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
48 - "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22], "RB"."BLOCK#"[NUMBER,22]
49 - "RB".ROWID[ROWID,10], "RB"."TS#"[NUMBER,22]
50 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."ONLINE$"[NUMBER,22], "TS"."CONTENTS$"[NUMBER,22], "TS"."BLOCKSIZE"[NUMBER,22],
"TS"."BITMAPPED"[NUMBER,22]
51 - "TS".ROWID[ROWID,10]
52 - "U"."KTFBUESEGTSN"[NUMBER,22], "U"."KTFBUESEGFNO"[NUMBER,22],
"U"."KTFBUESEGBNO"[NUMBER,22], "U"."KTFBUEFNO"[NUMBER,22], "U"."KTFBUEBLKS"[NUMBER,22]
53 - "U"."LENGTH"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
54 - "U"."TS#"[NUMBER,22], "U"."LENGTH"[NUMBER,22]
55 - "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22], "RB"."BLOCK#"[NUMBER,22],
"FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
56 - "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22], "RB"."BLOCK#"[NUMBER,22]
57 - (#keys=0) "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
58 - "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
59 - "U".ROWID[ROWID,10], "U"."TS#"[NUMBER,22], "U"."SEGFILE#"[NUMBER,22],
"U"."SEGBLOCK#"[NUMBER,22], "U"."LENGTH"[NUMBER,22]
60 - "U".ROWID[ROWID,10]
61 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."BLOCKSIZE"[NUMBER,22], "TS"."BITMAPPED"[NUMBER,22]
62 - "TS".ROWID[ROWID,10]
63 - "D"."TABLESPACE_NAME"[VARCHAR2,30], "SPACE"[NUMBER,22], "USED_SPACE"[NUMBER,22],
"FREE_SPACE"[NUMBER,22]
64 - "D"."TABLESPACE_NAME"[VARCHAR2,30], "SPACE"[NUMBER,22]
65 - "TS"."NAME"[VARCHAR2,30], SUM(DECODE("HC"."KTFTHCCVAL",0,"HC"."KTFTHCSZ",NULL))[22],
SUM(DECODE("HC"."KTFTHCCVAL",0,"TS"."BLOCKSIZE"*"HC"."KTFTHCSZ",NULL))[22]
66 - "HC"."KTFTHCSZ"[NUMBER,22], "HC"."KTFTHCCVAL"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."BLOCKSIZE"[NUMBER,22]
67 - "V"."FNNUM"[NUMBER,22], "V"."FNFNO"[NUMBER,22], "HC"."KTFTHCSZ"[NUMBER,22],
"HC"."KTFTHCCVAL"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
68 - "V"."FNNUM"[NUMBER,22], "V"."FNFNO"[NUMBER,22], "HC"."KTFTHCTSN"[NUMBER,22],
"HC"."KTFTHCSZ"[NUMBER,22], "HC"."KTFTHCCVAL"[NUMBER,22]
69 - "V"."FNNUM"[NUMBER,22], "V"."FNTYP"[NUMBER,22], "V"."FNFNO"[NUMBER,22],
"V"."FNNAM"[VARCHAR2,513]
70 - "HC"."KTFTHCTFNO"[NUMBER,22], "HC"."KTFTHCTSN"[NUMBER,22], "HC"."KTFTHCSZ"[NUMBER,22],
"HC"."KTFTHCCVAL"[NUMBER,22]
71 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
"TS"."BLOCKSIZE"[NUMBER,22]
72 - "TS".ROWID[ROWID,10]
73 - "TF"."TFNUM"[NUMBER,22], "TF"."TFSTA"[NUMBER,22], "TF"."TFFNH"[NUMBER,22],
"TF"."TFDUP"[NUMBER,22]
74 - "USED_SPACE"[NUMBER,22], "FREE_SPACE"[NUMBER,22]
75 - (#keys=1) "TS"."NAME"[VARCHAR2,30], SUM("HC"."KTFTHCFREE"*"TS"."BLOCKSIZE")[22],
SUM(("HC"."KTFTHCSZ"-"HC"."KTFTHCFREE")*"TS"."BLOCKSIZE")[22]
76 - "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22], "HC"."KTFTHCSZ"[NUMBER,22],
"HC"."KTFTHCFREE"[NUMBER,22]
77 - "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
78 - "TS".ROWID[ROWID,10], "TS"."NAME"[VARCHAR2,30]
79 - "HC"."INST_ID"[NUMBER,22], "HC"."KTFTHCTSN"[NUMBER,22], "HC"."KTFTHCSZ"[NUMBER,22],
"HC"."KTFTHCFREE"[NUMBER,22], "HC"."KTFTHCCVAL"[NUMBER,22] 450 rows selected.
针对运行计划比較长的sql语句，第一眼看有没有明显的问题。如TABLE ACCESS FULL、MERGE JOIN CARTESIAN等，这些会给sql带来较差的性能问题。
一眼看去，全是系统基表，不敢乱动。
那么在运行计划56行那块，有个全表扫描，最要命的是上面另一个笛卡尔积。以下来看看recyclebin$表中有多少行记录：
SQL> select count(1) from RECYCLEBIN$; COUNT(1)
----------
697111
接近70万行记录，难怪1小时也跑不出来。
清除recyclebin：
SQL> purge dba_recyclebin; DBA Recyclebin purged. SQL> select count(1) from recyclebin$; COUNT(1)
----------
3334
再次执行sql：
SQL> set timing on;
SQL> set linesize 200;
SQL> set pagesize 1000;
SQL> col tablespace_name for a20;
SQL> col Total(M) for 999,999,999;
SQL> col USED(M) for 999,999,999;
SQL> col FREE(M) for 999,999,999;
SQL> SELECT D.TABLESPACE_NAME,
2 SPACE "Total(M)",
3 SPACE - NVL(FREE_SPACE, 0) "USED(M)",
4 ROUND((1 - NVL(FREE_SPACE, 0) / SPACE) * 100, 2) "USED(%)",
5 FREE_SPACE "FREE(M)"
6 FROM (SELECT TABLESPACE_NAME,
7 ROUND(SUM(BYTES) / (1024 * 1024), 2) SPACE,
8 SUM(BLOCKS) BLOCKS
9 FROM DBA_DATA_FILES
10 GROUP BY TABLESPACE_NAME) D,
11 (SELECT TABLESPACE_NAME,
12 ROUND(SUM(BYTES) / (1024 * 1024), 2) FREE_SPACE
13 FROM DBA_FREE_SPACE
14 GROUP BY TABLESPACE_NAME) F
15 WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
16 UNION ALL --if have tempfile
17 SELECT D.TABLESPACE_NAME,
18 SPACE "Total(M)",
19 USED_SPACE "USED(M)",
20 ROUND(NVL(USED_SPACE, 0) / SPACE * 100, 2) "USED(%)",
21 NVL(FREE_SPACE, 0) "FREE(M)"
22 FROM (SELECT TABLESPACE_NAME,
23 ROUND(SUM(BYTES) / (1024 * 1024), 2) SPACE,
24 SUM(BLOCKS) BLOCKS
25 FROM DBA_TEMP_FILES
26 GROUP BY TABLESPACE_NAME) D,
27 (SELECT TABLESPACE_NAME,
28 ROUND(SUM(BYTES_USED) / (1024 * 1024), 2) USED_SPACE,
29 ROUND(SUM(BYTES_FREE) / (1024 * 1024), 2) FREE_SPACE
30 FROM V$TEMP_SPACE_HEADER
31 GROUP BY TABLESPACE_NAME) F
32 WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
33 ORDER BY 4; 20 rows selected. Elapsed: 00:00:04.17 Execution Plan
----------------------------------------------------------
Plan hash value: 3967328987 ----------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
----------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 3 | 178 | 20 (25)| 00:00:01 |
| 1 | SORT ORDER BY | | 3 | 178 | 19 (22)| 00:00:01 |
| 2 | UNION-ALL | | | | | |
|* 3 | HASH JOIN OUTER | | 2 | 120 | 16 (19)| 00:00:01 |
| 4 | VIEW | | 2 | 60 | 5 (20)| 00:00:01 |
| 5 | HASH GROUP BY | | 2 | 68 | 5 (20)| 00:00:01 |
| 6 | VIEW | DBA_DATA_FILES | 2 | 68 | 4 (0)| 00:00:01 |
| 7 | UNION-ALL | | | | | |
| 8 | NESTED LOOPS | | 1 | 356 | 2 (0)| 00:00:01 |
| 9 | NESTED LOOPS | | 1 | 341 | 1 (0)| 00:00:01 |
| 10 | NESTED LOOPS | | 1 | 328 | 1 (0)| 00:00:01 |
|* 11 | FIXED TABLE FULL | X$KCCFN | 1 | 310 | 0 (0)| 00:00:01 |
|* 12 | TABLE ACCESS BY INDEX ROWID| FILE$ | 1 | 18 | 1 (0)| 00:00:01 |
|* 13 | INDEX UNIQUE SCAN | I_FILE1 | 1 | | 0 (0)| 00:00:01 |
|* 14 | FIXED TABLE FIXED INDEX | X$KCCFE (ind:1) | 20 | 260 | 0 (0)| 00:00:01 |
| 15 | TABLE ACCESS CLUSTER | TS$ | 1 | 15 | 1 (0)| 00:00:01 |
|* 16 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| 00:00:01 |
| 17 | NESTED LOOPS | | 1 | 399 | 2 (0)| 00:00:01 |
| 18 | NESTED LOOPS | | 1 | 386 | 2 (0)| 00:00:01 |
| 19 | NESTED LOOPS | | 1 | 377 | 1 (0)| 00:00:01 |
| 20 | NESTED LOOPS | | 1 | 362 | 0 (0)| 00:00:01 |
|* 21 | FIXED TABLE FULL | X$KCCFN | 1 | 310 | 0 (0)| 00:00:01 |
|* 22 | FIXED TABLE FIXED INDEX | X$KTFBHC (ind:1) | 1 | 52 | 0 (0)| 00:00:01 |
| 23 | TABLE ACCESS CLUSTER | TS$ | 1 | 15 | 1 (0)| 00:00:01 |
|* 24 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| 00:00:01 |
|* 25 | TABLE ACCESS BY INDEX ROWID | FILE$ | 1 | 9 | 1 (0)| 00:00:01 |
|* 26 | INDEX UNIQUE SCAN | I_FILE1 | 1 | | 0 (0)| 00:00:01 |
|* 27 | FIXED TABLE FIXED INDEX | X$KCCFE (ind:1) | 20 | 260 | 0 (0)| 00:00:01 |
| 28 | VIEW | | 5 | 150 | 11 (19)| 00:00:01 |
| 29 | HASH GROUP BY | | 5 | 105 | 11 (19)| 00:00:01 |
| 30 | VIEW | DBA_FREE_SPACE | 79 | 1659 | 10 (10)| 00:00:01 |
| 31 | UNION-ALL | | | | | |
| 32 | NESTED LOOPS | | 1 | 64 | 1 (0)| 00:00:01 |
| 33 | NESTED LOOPS | | 1 | 45 | 1 (0)| 00:00:01 |
| 34 | INDEX FULL SCAN | I_FILE2 | 5 | 30 | 1 (0)| 00:00:01 |
|* 35 | TABLE ACCESS CLUSTER | FET$ | 1 | 39 | 0 (0)| 00:00:01 |
|* 36 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| 00:00:01 |
|* 37 | TABLE ACCESS CLUSTER | TS$ | 1 | 19 | 0 (0)| 00:00:01 |
|* 38 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| 00:00:01 |
| 39 | NESTED LOOPS | | 76 | 5320 | 4 (0)| 00:00:01 |
| 40 | NESTED LOOPS | | 76 | 4864 | 4 (0)| 00:00:01 |
|* 41 | TABLE ACCESS FULL | TS$ | 5 | 125 | 4 (0)| 00:00:01 |
|* 42 | FIXED TABLE FIXED INDEX | X$KTFBFE (ind:1) | 17 | 663 | 0 (0)| 00:00:01 |
|* 43 | INDEX UNIQUE SCAN | I_FILE2 | 1 | 6 | 0 (0)| 00:00:01 |
| 44 | NESTED LOOPS | | 1 | 135 | 2 (50)| 00:00:01 |
| 45 | NESTED LOOPS | | 1 | 70 | 1 (0)| 00:00:01 |
| 46 | NESTED LOOPS | | 1 | 45 | 1 (0)| 00:00:01 |
| 47 | INDEX FULL SCAN | I_FILE2 | 5 | 30 | 1 (0)| 00:00:01 |
| 48 | TABLE ACCESS BY INDEX ROWID| RECYCLEBIN$ | 1 | 39 | 0 (0)| 00:00:01 |
|* 49 | INDEX RANGE SCAN | RECYCLEBIN$_TS | 1 | | 0 (0)| 00:00:01 |
|* 50 | TABLE ACCESS CLUSTER | TS$ | 1 | 25 | 0 (0)| 00:00:01 |
|* 51 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| 00:00:01 |
|* 52 | FIXED TABLE FIXED INDEX | X$KTFBUE (ind:1) | 1 | 65 | 1 (100)| 00:00:01 |
| 53 | NESTED LOOPS | | 1 | 116 | 3 (0)| 00:00:01 |
| 54 | NESTED LOOPS | | 1 | 97 | 3 (0)| 00:00:01 |
| 55 | MERGE JOIN CARTESIAN | | 1 | 45 | 3 (0)| 00:00:01 |
| 56 | TABLE ACCESS FULL | RECYCLEBIN$ | 1 | 39 | 2 (0)| 00:00:01 |
| 57 | BUFFER SORT | | 5 | 30 | 1 (0)| 00:00:01 |
| 58 | INDEX FULL SCAN | I_FILE2 | 5 | 30 | 1 (0)| 00:00:01 |
| 59 | TABLE ACCESS CLUSTER | UET$ | 1 | 52 | 0 (0)| 00:00:01 |
|* 60 | INDEX UNIQUE SCAN | I_FILE#_BLOCK# | 1 | | 0 (0)| 00:00:01 |
|* 61 | TABLE ACCESS CLUSTER | TS$ | 1 | 19 | 0 (0)| 00:00:01 |
|* 62 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| 00:00:01 |
| 63 | NESTED LOOPS OUTER | | 1 | 58 | 3 (34)| 00:00:01 |
| 64 | VIEW | | 1 | 30 | 2 (50)| 00:00:01 |
| 65 | HASH GROUP BY | | 1 | 416 | 2 (50)| 00:00:01 |
| 66 | NESTED LOOPS | | 1 | 416 | 1 (0)| 00:00:01 |
| 67 | NESTED LOOPS | | 1 | 364 | 1 (0)| 00:00:01 |
| 68 | NESTED LOOPS | | 1 | 349 | 0 (0)| 00:00:01 |
|* 69 | FIXED TABLE FULL | X$KCCFN | 1 | 297 | 0 (0)| 00:00:01 |
|* 70 | FIXED TABLE FIXED INDEX | X$KTFTHC (ind:1) | 1 | 52 | 0 (0)| 00:00:01 |
| 71 | TABLE ACCESS CLUSTER | TS$ | 1 | 15 | 1 (0)| 00:00:01 |
|* 72 | INDEX UNIQUE SCAN | I_TS# | 1 | | 0 (0)| 00:00:01 |
|* 73 | FIXED TABLE FIXED INDEX | X$KCCTF (ind:1) | 1 | 52 | 0 (0)| 00:00:01 |
| 74 | VIEW PUSHED PREDICATE | | 1 | 28 | 1 (0)| 00:00:01 |
| 75 | SORT GROUP BY | | 1 | 90 | 1 (0)| 00:00:01 |
| 76 | NESTED LOOPS | | 1 | 90 | 1 (0)| 00:00:01 |
|* 77 | TABLE ACCESS BY INDEX ROWID | TS$ | 1 | 25 | 1 (0)| 00:00:01 |
|* 78 | INDEX UNIQUE SCAN | I_TS1 | 1 | | 0 (0)| 00:00:01 |
|* 79 | FIXED TABLE FIXED INDEX | X$KTFTHC (ind:2) | 1 | 65 | 0 (0)| 00:00:01 |
---------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id):
--------------------------------------------------- 3 - access("D"."TABLESPACE_NAME"="F"."TABLESPACE_NAME"(+))
11 - filter("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND
BITAND("FNFLG",4)<>4)
12 - filter("F"."SPARE1" IS NULL)
13 - access("FNFNO"="F"."FILE#")
14 - filter("FE"."FENUM"="F"."FILE#")
16 - access("F"."TS#"="TS"."TS#")
21 - filter("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND
BITAND("FNFLG",4)<>4)
22 - filter("FNFNO"="HC"."KTFBHCAFNO")
24 - access("HC"."KTFBHCTSN"="TS"."TS#")
25 - filter("F"."SPARE1" IS NOT NULL)
26 - access("FNFNO"="F"."FILE#")
27 - filter("FE"."FENUM"="F"."FILE#")
35 - filter("F"."FILE#"="FI"."RELFILE#")
36 - access("F"."TS#"="FI"."TS#")
37 - filter("TS"."BITMAPPED"=0)
38 - access("TS"."TS#"="F"."TS#")
41 - filter("TS"."CONTENTS$"=0 AND "TS"."BITMAPPED"<>0 AND ("TS"."ONLINE$"=1 OR
"TS"."ONLINE$"=4))
42 - filter("TS"."TS#"="F"."KTFBFETSN")
43 - access("F"."KTFBFETSN"="FI"."TS#" AND "F"."KTFBFEFNO"="FI"."RELFILE#")
49 - access("RB"."TS#"="FI"."TS#")
50 - filter("TS"."CONTENTS$"=0 AND "TS"."BITMAPPED"<>0 AND ("TS"."ONLINE$"=1 OR
"TS"."ONLINE$"=4))
51 - access("TS"."TS#"="RB"."TS#")
52 - filter("U"."KTFBUEFNO"="FI"."RELFILE#" AND "U"."KTFBUESEGTSN"="RB"."TS#" AND
"U"."KTFBUESEGFNO"="RB"."FILE#" AND "U"."KTFBUESEGBNO"="RB"."BLOCK#")
60 - access("U"."TS#"="RB"."TS#" AND "U"."SEGFILE#"="RB"."FILE#" AND
"U"."SEGBLOCK#"="RB"."BLOCK#")
filter("U"."TS#"="FI"."TS#" AND "U"."SEGFILE#"="FI"."RELFILE#")
61 - filter("TS"."BITMAPPED"=0)
62 - access("TS"."TS#"="U"."TS#")
69 - filter("V"."FNNAM" IS NOT NULL AND "V"."FNTYP"=7)
70 - filter("V"."FNFNO"="HC"."KTFTHCTFNO")
72 - access("HC"."KTFTHCTSN"="TS"."TS#")
73 - filter("TF"."TFDUP"<>0 AND BITAND("TF"."TFSTA",32)<>32 AND "V"."FNFNO"="TF"."TFNUM" AND
"TF"."TFFNH"="V"."FNNUM")
77 - filter("TS"."CONTENTS$"=1 AND "TS"."BITMAPPED"<>0 AND "TS"."ONLINE$"=1)
78 - access("TS"."NAME"="D"."TABLESPACE_NAME")
79 - filter("HC"."KTFTHCCVAL"=0 AND "HC"."INST_ID"=USERENV('INSTANCE') AND
"TS"."TS#"="HC"."KTFTHCTSN") Statistics
----------------------------------------------------------
3472 recursive calls
2445 db block gets
25284 consistent gets
3282 physical reads
0 redo size
1675 bytes sent via SQL*Net to client
535 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
5 sorts (memory)
0 sorts (disk)
20 rows processed SQL>
这个时候sql仅仅须要4秒就能出结果了。从业务那块了解到，他们每天会批量导入和删除表。那么问题就明了了。
定时清理recyclebin还是很重要的。
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