Re: [HACKERS] removal of exec()

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: explorer(at)flame(dot)org (Michael Graff)
Cc: hackers(at)postgreSQL(dot)org (PostgreSQL-development)
Subject: Re: [HACKERS] removal of exec()
Date: 1998-05-28 04:27:16
Message-ID: 199805280427.AAA16776@candle.pha.pa.us
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>
> Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> writes:
>
> > I am testing a patch for removing exec() and using just fork(). I will
> > post it to the hackers list for review, if that is OK. Should be only a
> > few hundred lines.
>
> To do what exactly?
>
> --Michael
>

[FYI for others on the list.]

Currently, a backend is created by forking the postmaster, then exec'ing
an identical binary to run the backend. This change makes it just
fork(), but not exec() a new identical binary.

Why it was originally done this way, I don't know. It was not trivial
to change it. It saves 0.01 seconds on backend startup with single
query, which usually takes 0.08 seconds, so the 0.01 seconds is
significant.

--
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