Re: increasing the default WAL segment size

From: Eduardo Morras <emorrasg(at)yahoo(dot)es>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: increasing the default WAL segment size
Date: 2016-08-26 08:45:06
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On Wed, 24 Aug 2016 21:31:35 -0400
Robert Haas <robertmhaas(at)gmail(dot)com> wrote:

> Hi,
> I'd like to propose that we increase the default WAL segment size,
> which is currently 16MB. It was first set to that value in commit
> 47937403676d913c0e740eec6b85113865c6c8ab in October of 1999; prior to
> that, it was 64MB. Between 1999 and now, there have been three
> significant changes that make me think it might be time to rethink
> this value:
> Thoughts?

From my ignorance, could block size affect this WAL size increase?

In past (didn't tried with >9 versions) you can change disk block page size from 8KB to 16 KB or 32KB (or 4) modifing src/include/pg_config.h BLCKSZ 8192 and recompiling. (There are some mails in 1999-2002 about this topic)

> --
> Robert Haas
> EnterpriseDB:
> The Enterprise PostgreSQL Company

--- ---
Eduardo Morras <emorrasg(at)yahoo(dot)es>

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