Re: 10RC1 crash testing MultiXact oddity

From: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>
To: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: 10RC1 crash testing MultiXact oddity
Date: 2017-09-22 19:39:36
Message-ID: CAMkU=1yW=BRJUaGMg64N4e5QkJv=u-hQXo6om85qQjFFtwnoLA@mail.gmail.com
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On Fri, Sep 22, 2017 at 8:47 AM, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
wrote:

> Jeff Janes wrote:
> > I am running some crash recovery testing against 10rc1 by injecting torn
> > page writes, using a test case which generates a lot of multixact, some
> > naturally by doing a lot fk updates, but most artificially by calling
> > the pg_burn_multixact function from one of the attached patches.
>
> Is this new in pg10, or do you also see it in 9.6?
>

It turns out it is not new in pg10. I spotted in the log file only by
accident while looking for something else. Now that I am looking for it, I
do see it in 9.6 as well.

Cheers,

Jeff

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