From: Vik Fearing <vik.fearing@2ndquadrant.com>
To: Joao Junior <jcoj2006@gmail.com>
To: pgsql-performance@postgresql.org
Cc: Pavel Stehule <pavel.stehule@gmail.com>
Subject: Re: Analyze on slave promoted.
Date: Fri, 27 Sep 2019 12:41:05 +0200
Message-ID: <ba1c2d91-d1af-f704-7374-5f2ec771db38@2ndquadrant.com> (raw)
In-Reply-To: <CABnPa_j1oLm_psF3f8o5GZBoh+2acWkkARH1d6dFKQyL5Bt+tw@mail.gmail.com>
References: <CABnPa_j1oLm_psF3f8o5GZBoh+2acWkkARH1d6dFKQyL5Bt+tw@mail.gmail.com>
On 26/09/2019 09:54, Joao Junior wrote:
> Hi,
> Is this necessary to run analyze on a slave using streaming
> replication after promotion??
>
Yes, you should run ANALYZE on all of your tables in all of your
databases after a promotion. The data distribution statistics are
replicated, as Pavel mentioned, but other statistics are not. In
particular, pg_stat_all_tables.n_dead_tup is not replicated and so
autovacuum has no idea when it needs to run.
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To: pgsql-performance@postgresql.org
Cc: vik.fearing@2ndquadrant.com, jcoj2006@gmail.com, pavel.stehule@gmail.com
Subject: Re: Analyze on slave promoted.
In-Reply-To: <ba1c2d91-d1af-f704-7374-5f2ec771db38@2ndquadrant.com>
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