Re: Parallelize WAL Sender and WAL receiver

From: Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
To: Muhammad Usman Khan <usman(dot)k(at)bitnine(dot)net>, Karthik Yellapragada <karthik(dot)yellapragada(at)gmail(dot)com>
Cc: Pgsql-admin <pgsql-admin(at)lists(dot)postgresql(dot)org>
Subject: Re: Parallelize WAL Sender and WAL receiver
Date: 2024-09-06 05:02:40
Message-ID: 983b35b7c595124359a092b290152eb865523309.camel@cybertec.at
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On Fri, 2024-09-06 at 08:33 +0500, Muhammad Usman Khan wrote:
> On Thu, 5 Sept 2024 at 06:04, Karthik Yellapragada <karthik(dot)yellapragada(at)gmail(dot)com> wrote:
> > I frequently face the problem of wals generated faster than the wals transferred and applied.
> >
> > Is there a way to speed up the process? So I don’t accumulate a lot of WALs at the primary?
> >
>
> You can try to set the following parameters in the conf file which may help to overcome this problem.
>
> wal_sender_timeout = 60s
> wal_receiver_status_interval = 1s
> Ensure you have sufficient WAL senders like max_wal_senders = 10
> max_wal_size = 2GB
> min_wal_size = 80MB
> wal_buffers = 16MB
> wal_level = replica

These settings won't do anything to mitigate the problem.

All you can do is get more network bandwidth.

Yours,
Laurenz Albe

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