管理TEMP数据

SQL> select * from v$mystat where rownum<2;

       SID STATISTIC#	   VALUE
---------- ---------- ----------
	32	    0	       0

SQL> select * from test_1 order by 1,2,3,4;

---查看TEMP使用的块比例

SQL> select tablespace_name,current_users,total_blocks,used_blocks,free_blocks,free_blocks/total_blocks from v$sort_segment;

TABLESPACE_NAME 		CURRENT_USERS TOTAL_BLOCKS USED_BLOCKS FREE_BLOCKS FREE_BLOCKS/TOTAL_BLOCKS
------------------------------- ------------- ------------ ----------- ----------- ------------------------
TEMP1					    2	    121728	 34432	     87296		 .717139853

CURRENT_USERS	NUMBER	Number of active users of the segment  ---活动的用户数

TOTAL_BLOCKS	NUMBER	Total number of blocks in the segment

USED_BLOCKS	NUMBER	Blocks allocated to active sorts

---查看排序的SESSION ID:
SQL> select sid,username,program from v$session where saddr in (select session_addr from V$TEMPSEG_USAGE);

       SID USERNAME			  PROGRAM
---------- ------------------------------ ------------------------------------------------
	32 SCOTT			  sqlplus@june (TNS V1-V3)
	34 SCOTT			  plsqldev.exe

v$session saddr :Session address

V$TEMPSEG_USAGE session_addr:Address of shared SQL cursor

----查看排序会话的SID SQL_ID 和排序段类型
SQL> select username,SESSION_ADDR,sql_id,segtype from V$TEMPSEG_USAGE ;

USERNAME		       SESSION_ SQL_ID	      SEGTYPE
------------------------------ -------- ------------- ---------
SCOTT			       2E7D6A24 bydf32qgqdwdu DATA
SCOTT			       2E7DBEFC 0trztnfnjqgk5 SORT