From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Fred Habash <fmhabash@gmail.com>
Cc: pgsql-performance@lists.postgresql.org
Subject: Re: Guideline To Resolve LWLock:SubtransControlLock
Date: Mon, 20 Aug 2018 18:00:27 -0300
Message-ID: <20180820210027.iu3pryzkfssmptco@alvherre.pgsql> (raw)
In-Reply-To: <82F3FC39-72DA-4C25-804A-212DE0E5ECB3@gmail.com>
On 2018-Aug-20, Fred Habash wrote:
> How do we go about calculating appropriate values for these two parameters ...
I don't know a lot about your system, so don't have anything to go on.
Also, Aurora is mostly unknown to me. What did Amazon say?
> > 'NUM_SUBTRANS_BUFFERS'?
> TOTAL_MAX_CACHED_SUBXIDS
>
> And do both require a recompile?
Yes. But maybe they'll just move the contention point a little bit
backwards without actually fixing anything.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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To: pgsql-performance@postgresql.org
Cc: alvherre@2ndquadrant.com, fmhabash@gmail.com, pgsql-performance@lists.postgresql.org
Subject: Re: Guideline To Resolve LWLock:SubtransControlLock
In-Reply-To: <20180820210027.iu3pryzkfssmptco@alvherre.pgsql>
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