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

From: Greg Stark <gsstark(at)mit(dot)edu>
To: Magnus Hagander <magnus(at)hagander(dot)net>
Cc: Dave Page <dpage(at)pgadmin(dot)org>, 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 14:56:45
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On Mon, Aug 10, 2009 at 3:49 PM, Magnus Hagander<magnus(at)hagander(dot)net> wrote:
>> 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.

I suppose there's some question of whether this is the kind of issue
we need to bother supporting for back-branches. The whole point of
supporting back branches is so that people who are already using them
can expect to have any known problems they might run into fixed.

If people are still running these old branches then presumably their
setup isn't prone to this problem. If they're going to update to
Win2003 or Win2008 then that's a whole new installation, not an
existing installation which might suddenly run into this problem.

Is the reason we support old branches so that people can install those
old branches in preference to newer ones? Or just so that people who
have already installed them can continue to rely on them?

The flaws in this line of argument are that a) I'm not entirely sure
my premise that someone who has been running fine won't suddenly run
into this problem is true. And b) nor am I entirely clear that you
have to reinstall Postgres or other apps when you upgrade Windows.


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