top 20 效率最差的sql
SELECT *
from (
SELECT EXECUTIONS ,ROUND((BUFFER_GETS-DISK_READS)/BUFFER_GETS,2) Hit_radio,
ROUND(DISK_READS/EXECUTIONS,2) Reads_per_run,
SQL_TEXT
FROM V$SQLAREA
WHERE EXECUTIONS>0
AND BUFFER_GETS > 0
AND (BUFFER_GETS-DISK_READS)/BUFFER_GETS < 0.8 ) a
where rownum<21 ;
运行时间最长的top 20 sql
SELECT *
from (
SELECT sql_text sql, executions runtimes, buffer_gets/decode(executions, 0, 1, executions) / 4000 responsetime
FROM v$sql
WHERE buffer_gets / decode(executions, 0,1, executions) / 4000 > 10
AND executions > 0
order by 2 desc) a
where rownum <21
SELECT *
from (
SELECT EXECUTIONS ,ROUND((BUFFER_GETS-DISK_READS)/BUFFER_GETS,2) Hit_radio,
ROUND(DISK_READS/EXECUTIONS,2) Reads_per_run,
SQL_TEXT
FROM V$SQLAREA
WHERE EXECUTIONS>0
AND BUFFER_GETS > 0
AND (BUFFER_GETS-DISK_READS)/BUFFER_GETS < 0.8 ) a
where rownum<21 ;
运行时间最长的top 20 sql
SELECT *
from (
SELECT sql_text sql, executions runtimes, buffer_gets/decode(executions, 0, 1, executions) / 4000 responsetime
FROM v$sql
WHERE buffer_gets / decode(executions, 0,1, executions) / 4000 > 10
AND executions > 0
order by 2 desc) a
where rownum <21
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/11411056/viewspace-733388/ ，如需转载，请注明出处，否则将追究法律责任。
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