Comments on: Advanced Oracle Troubleshooting Guide, Part 7: Sampling latch holder statistics using LatchProf

By: anil akduygu

anil akduygu — Thu, 06 Oct 2011 06:26:30 +0000

I can not reach latchprof web site. Please make it work.

By: Shamim

Shamim — Thu, 23 Jun 2011 18:21:21 +0000

Hello,

Can you please send me your scripts?

Thanks and regards
-Shamim

By: aliyar

aliyar — Tue, 17 May 2011 01:21:11 +0000

Thx Tanel ….

will check

By: Tanel Poder

Tanel Poder — Mon, 16 May 2011 21:19:20 +0000

@aliyar if you don't see a single session causing the trouble (which is usually the case) then you should report/group by something else, like SQL_ID... Did you start for the wait interface to determine which exact child latch (P1 in v$session) had the contention etc?

By: aliyar

aliyar — Mon, 16 May 2011 18:49:44 +0000

i used your latchprofile script during the performance problem in our production datawarehouse database .. tried to find any culprit session casuing more latch activity .. however script shows everytime different sessions …

so that shows no session hold latch long time and no problem with latch part .. is that correct ?

please correct me if i am wrong

thanks for your script .. really helpfull ..

Thanks
Aliyar

By: New versions of LatchProf and LatchProfX for latch contention troubleshooting and tuning | Tanel Poder's blog: Core IT for Geeks and Pros

Tue, 16 Feb 2010 03:03:59 +0000

[...] http://blog.tanelpoder.com/2008/07/09/advanced-oracle-troubleshooting-guide-part-7-sampling-latch-ho... [...]

By: latch: cache buffers chains latch contention – a better way for finding the hot block | Tanel Poder's blog: Core IT for Geeks and Pros

Thu, 27 Aug 2009 09:37:11 +0000

[...] http://blog.tanelpoder.com/2008/07/09/advanced-oracle-troubleshooting-guide-part-7-sampling-latch-ho... [...]

By: a reader

a reader — Wed, 11 Feb 2009 01:41:29 +0000

Hi Tanel,

a simple comment. rather than “press CTRL+C after first pageful of results”,
I preferred to get the top 10 only as where rownum < 11

thks&rgds.

By: Ricardo

Ricardo — Wed, 10 Sep 2008 20:23:39 +0000

You are right ;)

By: tanelp

tanelp — Wed, 10 Sep 2008 10:58:55 +0000

Hi Ricardo,

I didn’t really think about it. I put the hint in “just in case” to get this potential issue out of my mind. If this view is not mergeable now, who knows maybe in 12g it is :)

Tanel.