Re: Wal_keep_size

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От Thomas Carroll
Тема Re: Wal_keep_size
Дата
Msg-id 469228369.58843.1759786683881@mail.yahoo.com
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Ответ на Wal_keep_size  (Raj <rajeshkumar.dba09@gmail.com>)
Ответы Re: Wal_keep_size
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Hope nobody minds me chipping in here.

The answer is "not necessarily."  The names make them seem closely related, but not so much.

max_wal_size is all about checkpoints.  When the WAL exceeds this, Postgres will try to run a checkpoint.  Under some circumstances it won't, but let's keep it simple for now.

wal_keep_size is all about replication.  Replicas need WAL files to stick around for long enough that they can process them.  wal_keep_size is a minimum figure.

Tom
On Monday, October 6, 2025 at 03:51:17 PM EDT, Raj <rajeshkumar.dba09@gmail.com> wrote:


Should Wal_keep_size <= max_wal_size ?

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