Re: root cause of corruption in hot standby

From: Andres Freund <andres(at)anarazel(dot)de>
To: Mike Broers <mbroers(at)gmail(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: root cause of corruption in hot standby
Date: 2018-10-10 19:25:53
Message-ID: 20181010192553.yithduf3yrxasilz@alap3.anarazel.de
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Hi,

On 2018-09-06 12:28:18 -0500, Mike Broers wrote:
> So I have discovered corruption in a postgres 9.5.12 read replica, yay
> checksums!
>
> 2018-09-06 12:00:53 CDT [1563]: [4-1] user=postgres,db=production WARNING:
> page verification failed, calculated checksum 3482 but expected 32232
>
> 2018-09-06 12:00:53 CDT [1563]: [5-1] user=postgres,db=production ERROR:
> invalid page in block 15962 of relation base/16384/464832386

Have you compared whether that block looks significantly different on
the primary from the standby with a hex editor?

Greetings,

Andres Freund

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