From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Neil Conway <neilc(at)samurai(dot)com>, Claudio Natoli <claudio(dot)natoli(at)memetrics(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, PostgreSQL Win32 port list <pgsql-hackers-win32(at)postgresql(dot)org> |
Subject: | Re: [PATCHES] fork/exec patch |
Date: | 2003-12-15 03:27:41 |
Message-ID: | 200312150327.hBF3RfC28550@candle.pha.pa.us |
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Lists: | pgsql-hackers pgsql-hackers-win32 |
Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > ... Maybe we need a per-backend array in
> > shared memory just for those keys. The postmaster has to keep those
> > keys anyway, so moving into shared memory might be the right solution.
>
> The postmaster's dependence on the contents of shared memory should
> ideally be zero (and it is zero, or nearly so, at the moment).
> Otherwise a backend crash that clobbers shared memory poses the risk of
> taking down the postmaster as well. We can't go in that direction.
OK, but I think we are going to need shared memory to do signals on
Win32. Perhaps we should create a second shared memory areas only for
fork/exec to hold the per-backend parameters and the signal stuff ---
that might be the cleanest solution. Also, we could pass all the exec
parameters on the command line _except_ the cancel key, which must be
secret.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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