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Re: [HACKERS] removing the exec() from doexec()

From: Brett McCormick <brett(at)work(dot)chicken(dot)org>
To: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
Cc: pgsql-hackers(at)hub(dot)org
Subject: Re: [HACKERS] removing the exec() from doexec()
Date: 1998-04-30 02:01:01
Message-ID: 13639.56109.203807.876765@abraxas.scene.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On Wed, 29 April 1998, at 21:53:36, Bruce Momjian wrote:

> > This exec() takes 15% of our startup time.  I have wanted it removed for
> > many releases now.  The only problem is to rip out the code that
> > re-attached to shared memory and stuff like that, because you will no
> > longer loose the shared memory in the exec().  The IPC code is
> > complicated, so good luck.  I or others can help if you get stuck.
> > 
> 
> Another item is to no longer use SYSV shared memory but use
> mmap(MAP_ANON) because this allows a much larger amount of shared memory
> to be used.

What are the portability issues?  I haven't written much portable
code, and certainly not with IPC.

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