从 ASH 找到消耗 PGA 和 临时表空间 较多的 Top SQL_ID

Posted 2020-11-23 阿西吧li

最消耗 PGA 的 sql_id：

select *
from (select instance_number, sql_id, max(pga_sum_mb) pga_max
        from (select instance_number, sample_time, sql_id, round(sum(nvl(pga_allocated, 0))/1024/1024) pga_sum_mb
                from dba_hist_active_sess_history
               where sample_time between to_timestamp(‘&begin_timestamp‘, ‘yyyy/mm/dd hh24:mi‘) and to_timestamp(‘&end_timestamp‘, ‘yyyy/mm/dd hh24:mi‘)
            group by instance_number, sample_time, sql_id)
       group by instance_number, sql_id 
       order by pga_max desc)
where rownum <= 10;

最消耗临时段的 sql_id：

select *
from (select instance_number, sql_id, max(temp_sum_mb) temp_max
        from (select instance_number, sample_time, sql_id, round(sum(nvl(temp_space_allocated, 0))/1024/1024) temp_sum_mb
                from dba_hist_active_sess_history
               where sample_time between to_timestamp(‘&begin_timestamp‘, ‘yyyy/mm/dd hh24:mi‘) and to_timestamp(‘&end_timestamp‘, ‘yyyy/mm/dd hh24:mi‘)
            group by instance_number, sample_time, sql_id)
       group by instance_number, sql_id 
       order by temp_max desc)
where rownum <= 10;