Re: Concurrent update failure in HEAD

From: Takahiro Itagaki <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: Concurrent update failure in HEAD
Date: 2010-01-08 03:15:37
Message-ID: 20100108121537.3E0B.52131E4D@oss.ntt.co.jp
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Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Takahiro Itagaki <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp> writes:
> > I found pgbench sometimes receives responces of "UPDATE 0" from HEAD server.
> > When I re-tested pgbench with 8.4.2 server, all of the results were "UPDATE 1".
> > Are there known issues in HEAD for concurrent updates?
>
> There are now :-(. I've committed a fix that I think takes care of
> this, but since it seems to be a quite hard-to-reach path of control,
> please test some more.

Excellent! It worked perfenct and I don't see update failure anymore.

I hope we will have additional regression tests to find such kind of bugs.

Regards,
---
Takahiro Itagaki
NTT Open Source Software Center

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