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Re: [PATCH] "could not reattach to shared memory" on Windows

From: Magnus Hagander <magnus(at)hagander(dot)net>
To: Dave Page <dpage(at)pgadmin(dot)org>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Tsutomu Yamada <tsutomu(at)sraoss(dot)co(dot)jp>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PATCH] "could not reattach to shared memory" on Windows
Date: 2009-08-10 14:49:48
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Lists: pgsql-hackers
On Mon, Aug 10, 2009 at 16:45, Dave Page<dpage(at)pgadmin(dot)org> wrote:
> On Mon, Aug 10, 2009 at 3:33 PM, Magnus Hagander<magnus(at)hagander(dot)net> wrote:
>> On Mon, Aug 10, 2009 at 16:10, Tom Lane<tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>> Magnus Hagander <magnus(at)hagander(dot)net> writes:
>>>> It's been a couple of weeks now, and I've had a number of reports both
>>>> on-list, on-blog and in private, from people using this. I have not
>>>> yet had a single report of a problem caused by this patch (not
>>>> counting the case where there was a version mismatch - can't fault the
>>>> patch for that).
>>>> Given that, I say we apply this for 8.3 and 8.4 now. Comments?
>>> 8.2 as well, no?
>> 8.2 has a different shmem implementation - the one that emulates sysv
>> shmem. The patch will need to be changed around for that, and I
>> haven't looked at that. It may be worthwhile to do that, but it's a
>> separate patch, so let's get it out in 8.3 and 8.4 first.
> Has anyone reported the problem on 8.2?

Yes. I've seen reports of it all the way back to 8.0. It does seem to
have increased in frequently with Win2003 and Win2008 as the server
platforms, which means the newer versions have had a higher
percentage, but the issue definitely exists.

 Magnus Hagander

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