From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
Cc: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: MultiXact pessmization in 9.3 |
Date: | 2013-11-27 23:29:00 |
Message-ID: | 9563.1385594940@sss.pgh.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On 2013-11-27 19:24:35 -0300, Alvaro Herrera wrote:
>> The other idea is to just not backpatch this.
> I think backpatching is a good idea, I have seen GetMultiXactIdMembers()
> + slru code take up 80% cpu in strange workloads. But it possibly might
> be a good idea to wait till after the next point release to give people
> at least a minimal chance of catching problems.
Agreed on both counts. We're close enough now to Monday's wrap that we
should avoid anything that risks destabilizing 9.3.x, unless it's to fix
a serious bug. AIUI this is just a performance issue, so let's wait till
after 9.3.2 is done to push in the fix. But since it is a performance
regression from pre-9.3, never back-patching the fix at all isn't very
attractive.
regards, tom lane
From | Date | Subject | |
---|---|---|---|
Next Message | Kevin Grittner | 2013-11-27 23:36:12 | Re: [GENERAL] pg_upgrade ?deficiency |
Previous Message | Andres Freund | 2013-11-27 23:24:08 | Re: MultiXact bugs |