Re: Poor memory context performance in large hash joins

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Poor memory context performance in large hash joins
Date: 2017-03-08 17:22:51
Message-ID: 31888.1488993771@sss.pgh.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

Andres Freund <andres(at)anarazel(dot)de> writes:
> On 2017-03-07 13:06:39 -0500, Tom Lane wrote:
>> The hashjoin issue is certainly new, and the reorderbuffer issue can't
>> go back further than 9.4. So my inclination is to patch back to 9.4
>> and call it good.

> That works for me. If we find further cases later, we can easily enough
> backpatch it then.

Done like that.

regards, tom lane

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Jeff Janes 2017-03-08 17:28:23 Re: Parallel bitmap heap scan
Previous Message Alvaro Herrera 2017-03-08 17:14:52 Re: Patch: Write Amplification Reduction Method (WARM)