Comments on: ASH Masters

By: Monitoring Oracle Performance with AppDynamics | Oraculix (en)

Monitoring Oracle Performance with AppDynamics | Oraculix (en) — Tue, 16 Jul 2013 13:19:41 +0000

[...] Hailey’s site “ASH Masters” contains background information and useful scripts for [...]

By: Kyle Hailey

Kyle Hailey — Sat, 11 May 2013 00:36:38 +0000

@Sanju: do you get any of the graphs? If you get the Active Session History graph then the other should work as well. “ash init” just takes you to the active session history graph. The option “stats” takes you to the stats graphs which are all empty at he beginning. You have to click on the boxes at the top. Each box will hide or show stats from that group. The option “waits” should bring up a graph. It’s empty for 10-15 seconds until it starts pulling in data.

By: Sanju

Sanju — Thu, 09 May 2013 09:08:41 +0000

Hi I am using the ASHMON V2 on Oracle 9i database. I must say its brilliant. There are couple of things which I was not able get working(probably I am not using it the right way). Under the “Functions” menu, I am not able to get any info from ‘waits’, ‘stats’ and the ‘ash init’. Please can you help? Also I tried to use it on a system without Oracle Installed and it doesn’t seem to be working with ashmon/Oracle/network/admin.

By: Kyle Hailey

Kyle Hailey — Wed, 01 May 2013 15:25:48 +0000

@Peter: thanks for stopping by. Nice comparison of options for EE and SE tuning on your blog at http://petesdbablog.wordpress.com/2013/05/01/how-to-monitor-oracle-standard-edition-without-option-packs/

By: Peter

Peter — Wed, 01 May 2013 14:36:40 +0000

Hello,
i nice idea and a nice project which show that not all DBA`s needs to buy extra cost option to get out that there session are doing.

By: Kyle Hailey

Kyle Hailey — Wed, 17 Apr 2013 18:48:45 +0000

@EB: why did you filter for ‘BACKGROUND’ in the ASH query?
One thing to keep in mind is that DBA_HIST_ACTIVE_SESS_HISTORY is 1 in 10 ASH samples so you also have to multiply the result by 10.
Try taking out the filter on BACKGROUND processes and multiply the result by 10.

By: Kyle Hailey

Kyle Hailey — Wed, 17 Apr 2013 18:42:57 +0000

@Carl: I believe that was a presentation by John Beresniewicz
http://ashmasters.com/wp-content/uploads/2008/10/average-active-sessions-rmoug2007.pdf
that I linked into ashmasters.
Will ping John to see if he can contribute these to ashmasters on github

By: Carl

Carl — Mon, 15 Apr 2013 01:15:45 +0000

Hi Kyle,

Congratulations, this web site is very nice. One of the best that I know.

I read a pdf here in your website about AAS and there, i saw some names of scripts that I have not found, please Could you show me where I download it ?
scripts: SQL\ASHdumpAAS.sql, SQL\ASHcpuiowaitAS.sql, SQL\ASHmetricsAAS.sql , SQL\AWRsnapAAS.sql, SQL\LittlesLawAAS.sql

Thank you and congratulations again.

By: Another BASH | DNADBA

Another BASH | DNADBA — Thu, 11 Apr 2013 21:58:24 +0000

[...] recently, however, I’ve managed to get some of this functionality by using S-ASH . It’s pretty neat and I know that a lot of Oracle DBAs use [...]

By: EB

EB — Wed, 10 Apr 2013 10:29:57 +0000

Hello Kyle I use the following sqls SQL> select snap_id,begin_interval_time,end_interval_time from DBA_HIST_SNAPSHOT where to_char(end_interval_time,'DD/MM/YYYY HH24:MI')='05/04/2013 15:00' and instance_number=1; SNAP_ID BEGIN_INTERVAL_TIME END_INTERVAL_TIME ---------- --------------------------------------------------------------------------- --------------------------------------------------------------------------- 55387 05/04/2013 14:00:19,228 05/04/2013 15:00:28,048 SQL> select snap_id,begin_interval_time,end_interval_time from DBA_HIST_SNAPSHOT where to_char(end_interval_time,'DD/MM/YYYY HH24:MI')='05/04/2013 14:00' and instance_number=1; SNAP_ID BEGIN_INTERVAL_TIME END_INTERVAL_TIME ---------- --------------------------------------------------------------------------- --------------------------------------------------------------------------- 55386 05/04/2013 13:00:46,972 05/04/2013 14:00:19,228 SQL> SELECT * 2 FROM DBA_HIST_SYS_TIME_MODEL 3 WHERE snap_id IN ('55387', '55386') and stat_id=3649082374 and instance_number=1 4 ORDER BY 1 DESC 5 ; SNAP_ID DBID INSTANCE_NUMBER STAT_ID STAT_NAME VALUE ---------- ---------- --------------- ---------- ---------------------------------------------------------------- ---------- 55387 976214629 1 3649082374 DB time 782147124135 55386 976214629 1 3649082374 DB time 773479718813 so delta is 8667405322 microsecond SQL> SELECT snap_id,COUNT (*) 2 FROM DBA_HIST_ACTIVE_SESS_HISTORY 3 WHERE 4 sample_time BETWEEN TO_DATE ('05/04/2013 13:59', 'DD/MM/YYYY HH24:MI') 5 AND TO_DATE ('05/04/2013 15:01', 'DD/MM/YYYY HH24:MI') and session_type'BACKGROUND' and instance_number=1 group by snap_id; SNAP_ID COUNT(*) ---------- ---------- 55386 32 55388 21 55387 1072