查询软解析，硬解析百分比

Posted 2020-10-13

--查询Oracle数据库的软解析硬解析视图

SQL> select * from v$sysstat where name like ‘%parse%‘;

STATISTIC# NAME                                CLASS      VALUE    STAT_ID

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

       264 ADG parselock X get attempts            1          0  564381705

       265 ADG parselock X get successes           1          0 3808229129

       622 parse time cpu                         64        229  206905303

       623 parse time elapsed                     64       1376 1431595225

       624 parse count (total)                    64       8758   63887964

       625 parse count (hard)                     64       1457  143509059

       626 parse count (failures)                 64          7 1118776443

       627 parse count (describe)                 64         12  469016317

 

parse count hard 解析统计硬解析

parse count total 解析总数，包括硬解析、软解析

parse time cou  总CPU解析时间，单位10Ms，包括硬解析软解析

parse time elapsed完成解析调用总时间；

 

--查询，硬解析百分比：

select substr(a.value/b.value,1,4)*100||‘%‘ as "hard%" from (select value,class from v$sysstat where name like ‘%parse count (hard)%‘) a,(select value,class from v$sysstat where name like ‘%parse count (total)%‘) b where a.class=b.class;

 

--查询软解析百分比：

select substr((b.value-a.value)/b.value,1,4)*100||‘%‘ as "soft%" from (select value,class from v$sysstat where name like ‘%parse count (hard)%‘) a,(select value,class from v$sysstat where name like ‘%parse count (total)%‘) b where a.class=b.class;

 

--软解析:

with t as (select * from v$sysstat where name=‘parse count (total)‘),h as (select * from v$sysstat where name=‘parse count (hard)‘) select substr((t.value-h.value)/t.value,1,4)*100||‘%‘ as "soft%" from t,h;