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Re: [HACKERS] Speed up Clog Access by increasing CLOG buffers - Mailing list pgsql-hackers

From Amit Kapila
Subject Re: [HACKERS] Speed up Clog Access by increasing CLOG buffers
Date
Msg-id CAA4eK1JhimqZy7xFmbqjRxJno5GpjS-RrqXM2928xDJ58Sdfsg@mail.gmail.com
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In response to Re: [HACKERS] Speed up Clog Access by increasing CLOG buffers  (Ashutosh Sharma <ashu.coek88@gmail.com>)
Responses Re: [HACKERS] Speed up Clog Access by increasing CLOG buffers
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On Thu, Mar 23, 2017 at 1:18 PM, Ashutosh Sharma <ashu.coek88@gmail.com> wrote:
Conclusion:
As seen from the test results mentioned above, there is some performance improvement with 3 SP(s), with 5 SP(s) the results with patch is slightly better than HEAD, with 7 and 10 SP(s) we do see regression with patch. Therefore, I think the threshold value of 4 for number of subtransactions considered in the patch looks fine to me.


Thanks for the tests.  Attached find the rebased patch on HEAD.  I have ran latest pgindent on patch.  I have yet to add wait event for group lock waits in this patch as is done by Robert in commit  d4116a771925379c33cf4c6634ca620ed08b551d for ProcArrayGroupUpdate.

--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com
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