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

From: Etienne Dube <etdube(at)gmail(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PATCH] "could not reattach to shared memory" on Windows
Date: 2010-02-08 22:24:45
Message-ID: 4B708F2D.4010209@gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
Hi,

We've come across this issue on 8.2.15 on a Windows Server 2008 
instance. I noticed the patch hasn't been applied to the 8.2 branch yet. 
Any chances that this will be part of an eventual 8.2.16 release? Do you 
need more testing and feedback before commiting the patch?

Thanks,

Etienne Dube


>     * *From*: Magnus Hagander <magnus(at)hagander(dot)net>
>     * *To*: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
>     * *Cc*: Tsutomu Yamada <tsutomu(at)sraoss(dot)co(dot)jp>, Alvaro Herrera
>       <alvherre(at)commandprompt(dot)com>, pgsql-hackers(at)postgresql(dot)org, Dave
>       Page <dpage(at)pgadmin(dot)org>
>     * *Subject*: Re: [PATCH] "could not reattach to shared memory" on
>       Windows
>     * *Date*: Tue, 11 Aug 2009 17:14:08 +0200
>     * *Message-id*:
>       <9837222c0908110814n414b2fcbxcaf7c0e1fcc05999(at)mail(dot)gmail(dot)com
>       <http://archives.postgresql.org/pgsql-hackers/2009-08/msg00894.php>>
>
> ------------------------------------------------------------------------
> On Tue, Aug 11, 2009 at 16:30, Magnus Hagander<magnus(at)hagander(dot)net> wrote:
> > On Mon, Aug 10, 2009 at 19:33, Magnus Hagander<magnus(at)hagander(dot)net> wrote:
> >> On Mon, Aug 10, 2009 at 16:58, Tom Lane<tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >>> Magnus Hagander <magnus(at)hagander(dot)net> writes:
> >>>> On Mon, Aug 10, 2009 at 16:10, Tom Lane<tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >>>>> 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.
> >>>
> >>> If it's at all hard to do, I could see deprecating 8.2 for Windows
> >>> instead.
> >>
> >> I haven't looked at how much work it would be at all yet. So let's do
> >> that before we decide to deprecate anything. As mentioned downthread,
> >> 8.2 is a very widespread release, and we really want to avoid
> >> deprecating it.
> >
> > Here's an attempt at a backport to 8.2. I haven't examined it  in
> > detail, but it passes "make check" on mingw.
> >
> > Comments?
>
> I've also built a binary that should be copy:able on top of an 8.2.13
> installation made from the standard installer, to test this feature.
> Anybody on 8.2 on Windows, please give it a shot and let us know how
> it works.
>
> http://www.hagander.net/pgsql/postgres_exe_virtualalloc_8_2.zip
>
>
> -- 
>  Magnus Hagander
>   

>  Me: http://www.hagander.net/
>  Work: http://www.redpill-linpro.com/
>
>   

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