select * from (select buffer_gets, sql_text from v$sqlarea where buffer_gets > 500000 order by buffer_gets desc) where rownum<=30; -- 執行次數多的SQL select sql_text,executions from (select sql_text,executions from v$sqlarea order by executions desc) where rownum<81; -- 讀硬盤多的SQL select sql_text,disk_reads from (select sql_text,disk_reads from v$sqlarea order by disk_reads desc) where rownum<21; -- 排序多的SQL select sql_text,sorts from (select sql_text,sorts from v$sqlarea order by sorts desc) where rownum<21; set pagesize 600; set linesize 120; select substr(sql_text,1,80) "sql", count(*), sum(executions) "totexecs" from v$sqlarea where executions < 5 group by substr(sql_text,1,80) having count(*) > 30 order by 2; -- 游標的觀察 set pages 300; select sum(a.value), b.name from v$sesstat a, v$statname b where a.statistic# = b.statistic# and b.name = 'opened cursors current' group by b.name; select count(0) from v$open_cursor; select user_name,sql_text,count(0) from v$open_cursor group by user_name,sql_text having count(0)>30; select sql_text from v$sqltext_with_newlines where (hash_value,address) in (select sql_hash_value,sql_address from v$session where username='&username') order by address,piece; 新聞熱點
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