Re: Time to up bgwriter_lru_maxpages?

From: Andres Freund <andres(at)anarazel(dot)de>
To: Jim Nasby <Jim(dot)Nasby(at)BlueTreble(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Time to up bgwriter_lru_maxpages?
Date: 2017-02-02 00:28:35
Message-ID: 20170202002835.mrmpauaxkp34entx@alap3.anarazel.de
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On 2016-11-28 11:40:53 -0800, Jim Nasby wrote:
> With current limits, the most bgwriter can do (with 8k pages) is 1000 pages
> * 100 times/sec = 780MB/s. It's not hard to exceed that with modern
> hardware. Should we increase the limit on bgwriter_lru_maxpages?

FWIW, I think working on replacing bgwriter (e.g. by working on the
patch I send with a POC replacement) wholesale is a better approach than
spending time increasing limits.

- Andres

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