| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Speed up Clog Access by increasing CLOG buffers |
| Date: | 2017-07-03 12:45:47 |
| Message-ID: | CAA4eK1JhimqZy7xFmbqjRxJno5GpjS-RrqXM2928xDJ58Sdfsg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Mar 23, 2017 at 1:18 PM, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)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
| Attachment | Content-Type | Size |
|---|---|---|
| group_update_clog_v12.patch | application/octet-stream | 14.2 KB |
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