From: John Scalia <jayknowsunix@gmail.com>
To: Tharmarajah, Sam <sambavan.tharmarajah@usask.ca>
Cc: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Subject: Re: Req. for some help with resolving the error "pg_basebackup: could not get WAL end position from server: FATAL: requested WAL segment"
Date: Mon, 5 Dec 2016 14:52:22 -0500
Message-ID: <11CEA700-3307-4425-8ADF-6E819447889E@gmail.com> (raw)
In-Reply-To: <873181a7a9164ffe8b74c6e425a1a724@Mail02.usask.ca>
References: <873181a7a9164ffe8b74c6e425a1a724@Mail02.usask.ca>
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More than likely your keep_wal_segments setting is too low. How long is the pg_basebackup taking? Remember that segments are generated about every 5 minutes, so if the backup takes an hour, you need at least 12 segments stored. At 2 hours, you need 24 etc., I'd set the value to about 12.2 segments/hour of backup.
--
Jay
Sent from my iPad
> On Dec 5, 2016, at 1:57 PM, Tharmarajah, Sam <sambavan.tharmarajah@usask.ca> wrote:
>
> Hi
>
> I am a newbie to postgres. We are on postgres 9.1 running on RedHat 6. When we do the postgres backups we are noticing the following errors
>
> pg_basebackup: could not get WAL end position from server: FATAL: requested WAL segment 000000010000020B00000040 has already been removed
>
> But when I look into pg_xlog, I notice
>
> 000000010000020B00000040.00000118.backup
>
>
> May I know how to resolve this error? Are the backups done with these errors, recoverable?
>
>
> Thanks in advance for your support.
>
> Thanx,
> Sam
>
>
>
>
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To: pgsql-admin@postgresql.org
Cc: jayknowsunix@gmail.com, sambavan.tharmarajah@usask.ca
Subject: Re: Req. for some help with resolving the error "pg_basebackup: could not get WAL end position from server: FATAL: requested WAL segment"
In-Reply-To: <11CEA700-3307-4425-8ADF-6E819447889E@gmail.com>
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