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Re: Guideline To Resolve LWLock:SubtransControlLock - Mailing list pgsql-performance

From Alvaro Herrera
Subject Re: Guideline To Resolve LWLock:SubtransControlLock
Date
Msg-id 20180817182645.nmfaw6w7qzqb2dau@alvherre.pgsql
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In response to Re: Guideline To Resolve LWLock:SubtransControlLock  (Fred Habash <fmhabash@gmail.com>)
Responses Re: Guideline To Resolve LWLock:SubtransControlLock  (Fred Habash <fmhabash@gmail.com>)
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On 2018-Aug-17, Fred Habash wrote:

> Aurora Postgres 9.6.3

Oh, okay, I don't know this one.  Did you contact Amazon support?

> So, no chance to recompile (AFAIK).
> Is there a design anti-pattern at the schema or data access level that we
> should look for and correct?

Maybe ...

> And as for the recompile, are you thinking 'NUM_SUBTRANS_BUFFERS'?

Yes, that's one option, but there's also TOTAL_MAX_CACHED_SUBXIDS.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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