Июнь 2017 — bushmelev-aa.ru

Oracle, find query witch runs more than &1 sec

20.06.2017 Bushmelev Anton Комментариев нет

with stats as (
select /*+ materialize */
 * from (
select  parsing_schema_name,t.start#,t.end#,t.sql_id,t.plan_hash_value,t.execs,t.avg_sec,s.sql_text from (
 select  s.parsing_schema_name,min(begin_interval_time) start#,max(begin_interval_time) end#, sql_id, plan_hash_value,
sum(nvl(executions_delta,0)) execs,
 round ((sum(elapsed_time_delta)/(sum(executions_delta)))/1000000) avg_sec
from DBA_HIST_SQLSTAT S, DBA_HIST_SNAPSHOT SS
where 1=1
and ss.begin_interval_time > trunc(sysdate-4,'iw')
and ss.snap_id = S.snap_id
and ss.instance_number = S.instance_number
and executions_delta > 0
and (elapsed_time_delta/decode(nvl(executions_delta,0),0,1,executions_delta))/1000000 > &1
group by  sql_id, plan_hash_value,parsing_schema_name
 )t
join dba_hist_sqltext s on s.sql_id=t.sql_id
order by execs*avg_sec desc ) tt where
 rownum <= 50 )
 select * from stats s 
 where parsing_schema_name not like 'SYS%'
  and s.sql_text not like '%/* DS_SVC */%'
  and s.sql_text not like '%_job_proc%'
  and s.sql_text not like '%SQL Analyze%'
  and lower(s.sql_text) not like '%dbms_feature%'
  and s.sql_text not like '%SYS_DBA_SEGS%'
  and lower(s.sql_text) not like '%v$sys%'
  and lower(s.sql_text) not like '%dba_audit_trail%'
  and lower(s.sql_text) not like '%no_index(mytab)%';

Postgresql how-to find top query for last 15 seconds

15.06.2017 Bushmelev Anton Комментариев нет

DROP TABLE IF EXISTS pg_stat_statements_temp; 
  create table pg_stat_statements_temp as
  SELECT  d.datname,u.usename, s.queryid,
round(s.total_time::numeric, 2) AS total_time,
s.calls,
round(s.mean_time::numeric, 2) AS mean,
now() as cur_date
FROM    pg_stat_statements s
    join pg_database d on s.dbid=d.oid
    join pg_user u on s.userid=u.usesysid;
 
    select pg_sleep(15);



 with stat as (SELECT  d.datname,u.usename, s.queryid,s.query,
round(s.total_time::numeric, 2) AS total_time,
s.calls,
round(s.mean_time::numeric, 2) AS mean
FROM    pg_stat_statements s
    join pg_database d on s.dbid=d.oid
    join pg_user u on s.userid=u.usesysid  )
    select  s.datname,s.usename,s.queryid,regexp_replace(s.query, E'[\n\r]+', ' ', 'g' )::varchar(80) AS short_query,
    s.total_time-t.total_time as time,
    s.calls-t.calls as calls,
    s.mean -t.mean as mean, 
    round( 
      (100 * (s.total_time-t.total_time) /sum(s.total_time-t.total_time) OVER ()
            )::numeric, 2)     as cpu,
    now()-t.cur_date as diff_time, 
CASE WHEN s.calls-t.calls >0  THEN 
     (s.calls-t.calls )/(extract ( second from now()-t.cur_date) + extract ( minutes from now()-t.cur_date)*60 + extract ( minutes from now()-t.cur_date)*60*60 ) 
    else '0' 
    end as tps
     from stat s
    	join pg_stat_statements_temp t on s.datname=t.datname and s.usename=t.usename and s.queryid=t.queryid
    	order by cpu desc limit 20;

Oracle find query runs slower than ‘&1’ seconds in ‘&2’ minutes

11.06.2017 Bushmelev Anton Комментариев нет

with stats as (
select /*+ materialize */
 * from (
select  t.start#,t.end#,t.sql_id,t.plan_hash_value,t.execs,t.avg_sec,s.sql_text from (
 select  min(begin_interval_time) start#,max(begin_interval_time) end#, sql_id, plan_hash_value,
sum(nvl(executions_delta,0)) execs,
 round ((sum(elapsed_time_delta)/(sum(executions_delta)))/1000000) avg_sec
from DBA_HIST_SQLSTAT S, DBA_HIST_SNAPSHOT SS
where 1=1
and ss.begin_interval_time > (sysdate -&2/1440)
and ss.snap_id = S.snap_id
and ss.instance_number = S.instance_number
and executions_delta > 0
and (elapsed_time_delta/decode(nvl(executions_delta,0),0,1,executions_delta))/1000000 > &1
group by  sql_id, plan_hash_value
 )t
join dba_hist_sqltext s on s.sql_id=t.sql_id
order by execs*avg_sec desc ) tt where
 rownum <= 50 )
 select * from stats s 
 where 1=1
  and s.sql_text not like '%/* DS_SVC */%'
  and s.sql_text not like '%_job_proc%'
  and s.sql_text not like '%SQL Analyze%'
  and lower(s.sql_text) not like '%dbms_feature%'
  and s.sql_text not like '%SYS_DBA_SEGS%'
  and lower(s.sql_text) not like '%v$sys%'
  and lower(s.sql_text) not like '%dba_audit_trail%'
  and lower(s.sql_text) not like '%no_index(mytab)%';

oracle12c how-to get detailed info about gather stat job

01.06.2017 Bushmelev Anton Комментариев нет

from oracle 12c it is possible to find out detailed information about gather stats job
in em you may find it at

or use dbms_stats.report_* to get info
detailed at https://docs.oracle.com/database/121/TGSQL/tgsql_astat.htm#TGSQL95102

I use it this way:

variable mystatsreport clob
declare
    begin
    :mystatsreport := dbms_stats.report_stats_operations(
    since=>SYSTIMESTAMP-3,
    until=>SYSTIMESTAMP,
    detail_level=>'ALL',
    format=>'TEXT');
    end;
   /

print mystatsreport

variable mystatsreport clob
declare
    begin
    :mystatsreport := dbms_stats.report_single_stats_operation ( opid => 11898,detail_level => 'TYPICAL', format =>'TEXT' );
    end;
   /
print mystatsreport

variable mystatsreport clob
declare
    begin
    :mystatsreport := dbms_stats.report_single_stats_operation ( opid => 11898,detail_level => 'TYPICAL', format =>'TEXT' );
    end;
   /
   print mystatsreport

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