| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Jesper Pedersen <jesper(dot)pedersen(at)redhat(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Reduce ProcArrayLock contention |
| Date: | 2015-08-07 17:30:46 |
| Message-ID: | 20150807173046.GE4916@alap3.anarazel.de |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On 2015-08-07 12:49:20 -0400, Jesper Pedersen wrote:
> On 08/07/2015 11:40 AM, Robert Haas wrote:
> >On Fri, Aug 7, 2015 at 10:30 AM, Jesper Pedersen
> ><jesper(dot)pedersen(at)redhat(dot)com> wrote:
> >>Just thought I would post it in this thread, because this change does help
> >>on the performance numbers compared to 9.5 :)
> >
> >So are you saying that the performance was already worse before this
> >patch landed, and then this patch made it somewhat better? Or are you
> >saying you think this patch broke it?
> >
>
> No, this patch helps on performance - there is an improvement in numbers
> between
>
> http://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=253de7e1eb9abbcf57e6c229a8a38abd6455c7de
>
> and
>
> http://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=0e141c0fbb211bdd23783afa731e3eef95c9ad7a
>
> but you will have to use a 9.5 pgbench to see it, especially with higher
> client counts.
This bisects down to 1bc90f7a7b7441a88e2c6d4a0e9b6f9c1499ad30 - "Remove
thread-emulation support from pgbench."
Andres
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Andres Freund | 2015-08-07 18:03:47 | Re: Reduce ProcArrayLock contention |
| Previous Message | Andres Freund | 2015-08-07 17:17:32 | Re: Raising our compiler requirements for 9.6 |