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

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: brett(at)abraxas(dot)scene(dot)com (Brett McCormickS)
Cc: pgsql-hackers(at)hub(dot)org
Subject: Re: [HACKERS] removing the exec() from doexec()
Date: 1998-04-30 01:44:15
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
> I'm planning on removing the exec from DoExec() and instead just
> dispatch to the appropriate function.
> I don't plan on any changes to the usage of "arguments" to this new
> process, basically I'll just store them somewhere and then the forked
> backend can process them.
> Is there anything I should keep in mind?  I'd like this to eventually
> be integrated into the source tree -- any particular reason why we use
> exec() when we're just re-invoking the same binary?
> p.s. this is so my ssl patch doesn't have to negotiate twice -- very expensive

No reason for the exec().  I believe the only advantage is that it gives
us a separate process name in the 'ps' listing.  I have looked into
simulating this.

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.

Bruce Momjian                          |  830 Blythe Avenue
maillist(at)candle(dot)pha(dot)pa(dot)us              |  Drexel Hill, Pennsylvania 19026
  +  If your life is a hard drive,     |  (610) 353-9879(w)
  +  Christ can be your backup.        |  (610) 853-3000(h)

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