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本篇内容介绍了“AWR TOP SQL 实现方法是什么”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让丸趣 TV 小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
1 按解析次数排序
select a.*,
to_char(substr(b.sql_text,1,4000))
(select dhs.sql_id,
sum(parse_calls_delta) parse,
sum(executions_delta) exec_nums,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id 22438
and snap_id = 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a.parse desc;
2 按执行时间排序
select a.*,
to_char(substr(b.sql_text,1,4000))
(select dhs.sql_id,
round(sum(elapsed_time_delta)/1000/1000,2) elapsed_time(s) ,
sum(executions_delta) execs,
round(sum(elapsed_time_delta)/1000/1000/sum(executions_delta),2) elapsed_time_per,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id 22438
and snap_id = 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a. elapsed_time(s) desc;
3 按 CPU 时间排序
select a.*,
to_char(substr(b.sql_text,1,4000))
(select dhs.sql_id,
round(sum(cpu_time_delta)/1000/1000,2) cpu_time ,
sum(executions_delta) execs,
round(sum(cpu_time_delta)/1000/1000/sum(executions_delta),2) cpu_time_per,
round(sum(elapsed_time_delta)/1000/1000,2) elapsed_time(s) ,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id 22438
and snap_id = 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a. cpu_time desc;
4 按 User I/O wait 排序
select a.*,
to_char(substr(b.sql_text,1,4000))
(select dhs.sql_id,
round(sum(iowait_delta)/1000/1000,2) iowait_time(s) ,
sum(executions_delta) execs,
round(sum(iowait_delta)/1000/1000/sum(executions_delta),2) iowait_time_per,
round(sum(elapsed_time_delta)/1000/1000,2) elapsed_time(s) ,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id 22438
and snap_id = 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a. iowait_time(s) desc;
5 按逻辑读 (gets) 排序
select a.*,
to_char(substr(b.sql_text,1,4000))
(select dhs.sql_id,
round(sum(buffer_gets_delta),2) buffer_ges ,
sum(executions_delta) execs,
round(sum(buffer_gets_delta)/sum(executions_delta),2) iowait_time_per,
round(sum(elapsed_time_delta)/1000/1000,2) elapsed_time(s) ,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id 22438
and snap_id = 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a. buffer_ges desc;
7 按物理读 (physical read) 排序
select a.*,
to_char(substr(b.sql_text,1,4000))
(select dhs.sql_id,
round(sum(DISK_READS_DELTA),2) physical_read ,
sum(executions_delta) execs,
round(sum(DISK_READS_DELTA)/sum(executions_delta),2) iowait_time_per,
round(sum(elapsed_time_delta)/1000/1000,2) elapsed_time(s) ,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id 22438
and snap_id = 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a. physical_read desc;
8 按执行次数排序
select a.*,
to_char(substr(b.sql_text,1,4000))
(select dhs.sql_id,
round(sum(executions_delta),2) exec_num ,
sum(ROWS_PROCESSED_DELTA) row_process,
round(sum(ROWS_PROCESSED_DELTA)/sum(executions_delta),2) rows_per_exec,
round(sum(elapsed_time_delta)/1000/1000,2) elapsed_time(s) ,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id 22438
and snap_id = 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a. exec_num desc;
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