Re: [HACKERS] WIP: long transactions on hot standby feedback replica / proof of concept

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>
Cc: Andres Freund <andres(at)anarazel(dot)de>, Sawada Masahiko <sawada(dot)mshk(at)gmail(dot)com>, Ivan Kartyshov <i(dot)kartyshov(at)postgrespro(dot)ru>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [HACKERS] WIP: long transactions on hot standby feedback replica / proof of concept
Date: 2018-08-17 17:38:46
Message-ID: 6065.1534527526@sss.pgh.pa.us
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Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru> writes:
> On Fri, Aug 17, 2018 at 6:41 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
>> There's another patch, which I thought Alexander was referring to, that
>> does something a bit smarger. On a super short skim it seems to
>> introduce a separate type of AEL lock that's not replicated, by my
>> reading?

> Yes, that's correct. On standby read-only queries can tolerate
> concurrent heap truncation.

Uh, what???

regards, tom lane

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