Oracle八大性能视图之v$sort_usage_temp

 

1、表结构

SQL> desc v$sort_usage

 名称                                      是否为空? 类型

 ----------------------------------------- -------- ----------------------------

 USERNAME                                           VARCHAR2(30)

 USER                                               VARCHAR2(30)

 SESSION_ADDR                                       RAW(8)

 SESSION_NUM                                        NUMBER

 SQLADDR                                            RAW(8)

 SQLHASH                                            NUMBER

 SQL_ID                                             VARCHAR2(13)

 TABLESPACE                                         VARCHAR2(31)

 CONTENTS                                           VARCHAR2(9)

 SEGTYPE                                            VARCHAR2(9)

 SEGFILE#                                           NUMBER

 SEGBLK#                                            NUMBER

 EXTENTS                                            NUMBER

 BLOCKS                                             NUMBER

 SEGRFNO#                                           NUMBER

 

 2、SQL语句

 

 temp表空间的使用情况，当temp表空间变得巨大的时候，根据session_addr可以得到session id，根据sqladdr和sqlhash可以得到正在执行的sql：

select se.username,

       se.sid,

       su.extents,

       su.blocks * to_number(rtrim(p.value)) as Space,

       tablespace,

       segtype,

       sql_text

  from v$sort_usage su, v$parameter p, v$session se, v$sql s

 where p.name = 'db_block_size'

   and su.session_addr = se.saddr

   and s.hash_value = su.sqlhash

   and s.address = su.sqladdr

 order by se.username, se.sid;

 

 查询结果如下：

 

    USERNAME SID EXTENTS SPACE TABLESPACE SEGTYPE SQL_TEXT

1 SYS 145 1 1048576 TEMP DATA select value from v$sesstat where sid = :sid order by statistic#

2 SYS 145 1 1048576 TEMP INDEX select value from v$sesstat where sid = :sid order by statistic#

3 SYS 145 1 1048576 TEMP LOB_DATA select value from v$sesstat where sid = :sid order by statistic#

3、查临时文件情况

SELECT tf.inst_id, tf.tfnum, TO_NUMBER (tf.tfcrc_scn),       TO_DATE (tf.tfcrc_tim, 'MM/DD/RR HH24:MI:SS', 'NLS_CALENDAR=Gregorian'),       tf.tftsn, tf.tfrfn,       DECODE (BITAND (tf.tfsta, 2), 0, 'OFFLINE', 2, 'ONLINE', 'UNKNOWN'),       DECODE (BITAND (tf.tfsta, 12),               0, 'DISABLED',               4, 'READ ONLY',               12, 'READ WRITE',               'UNKNOWN'              ),       fh.fhtmpfsz * tf.tfbsz, fh.fhtmpfsz, tf.tfcsz * tf.tfbsz, tf.tfbsz,       fn.fnnam  FROM x$kcctf tf, x$kccfn fn, x$kcvfhtmp fh WHERE fn.fnfno = tf.tfnum   AND fn.fnfno = fh.htmpxfil   AND tf.tffnh = fn.fnnum   AND tf.tfdup != 0   AND fn.fntyp = 7   AND fn.fnnam IS NOT NULL

结果如下：

    INST_ID TFNUM TO_NUMBER(TF.TFCRC_SCN) TO_DATE(TF.TFCRC_TIM,'MM/DD/RR TFTSN TFRFN DECODE(BITAND(TF.TFSTA,2),0,'O DECODE(BITAND(TF.TFSTA,12),0,' FH.FHTMPFSZ*TF.TFBSZ FHTMPFSZ TF.TFCSZ*TF.TFBSZ TFBSZ FNNAM

1 1 1 519177 2010-4-9 12:51:42 3 1 ONLINE READ WRITE 33554432 4096 20971520 8192 D:\ORACLE64\PRODUCT\10.2.0\ORADATA\CSDB\TEMP01.DBF

4、查看谁在用临时表空间

SELECT se.username,se.sid,

se.serial#,

se.sql_address,

se.machine,

se.program,

su.tablespace,

su.segtype,

su.contents

FROM v$session se,

v$sort_usage su

WHERE se.saddr=su.session_addr;

结果如下：

    USERNAME SID SERIAL# SQL_ADDRESS MACHINE PROGRAM TABLESPACE SEGTYPE CONTENTS

1 SYS 145 15 00 WORKGROUP\ZHOULINLING plsqldev.exe TEMP DATA TEMPORARY

2 SYS 145 15 00 WORKGROUP\ZHOULINLING plsqldev.exe TEMP LOB_DATA TEMPORARY

3 SYS 145 15 00 WORKGROUP\ZHOULINLING plsqldev.exe TEMP INDEX TEMPORARY

5、查看临时表空间temp空闲情况

select TABLESPACE_NAME,file_id,bytes_used/1024/1024,bytes_free/1024/1024 from v$TEMP_SPACE_HEADER;