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From: Laurenz Albe <[email protected]>
To: David G. Johnston <[email protected]>
To: SASIKUMAR Devaraj <[email protected]>
Cc: Pgsql-admin <[email protected]>
Subject: Re: VacuumDB generating huge WAL filed
Date: Thu, 12 Dec 2024 07:35:47 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAKFQuway7Ly58D_e8UBaDR4hCw9T-2yvWiJ3+EZNzbvXoRWjMQ@mail.gmail.com>
References: <[email protected]>
	<[email protected]>
	<CAKFQuway7Ly58D_e8UBaDR4hCw9T-2yvWiJ3+EZNzbvXoRWjMQ@mail.gmail.com>

On Wed, 2024-12-11 at 23:25 -0700, David G. Johnston wrote:
> On Wednesday, December 11, 2024, SASIKUMAR Devaraj <[email protected]> wrote:
> > When we are running vacuumdb for our database of 1.5TB it is generating approximately 60GB
> > of WAL files? Any way we can reduce this WAL file generation?
> 
> Set a much more aggressive autovacuum so you don’t accumulate as much dead tuples between runs?

You can also activate "wal_compression" for smaller full-page images
and increase "max_wal_size" to get fewer of them.

But 60GB of WAL shouldn't be a problem.  Why are they a problem for you?

Yours,
Laurenz Albe

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