Re: [SQL] zombie postmasters

From: wieck(at)debis(dot)com (Jan Wieck)
To: tgl(at)sss(dot)pgh(dot)pa(dot)us (Tom Lane)
Cc: hamid(at)emarq(dot)com, pgsql-sql(at)postgresql(dot)org
Subject: Re: [SQL] zombie postmasters
Date: 1999-11-17 08:26:52
Message-ID: m11o0QW-0003kLC@orion.SAPserv.Hamburg.dsh.de
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>
> "Hamid Khoshnevis" <hamid(at)emarq(dot)com> writes:
> > In a web environment, a user can repeatedly starts and abort large queries
> > which create a large number of zombie postmasters.
>
> It shouldn't be possible for there to be zombie postgres processes ---
> the postmaster process should reap dead backends more or less instantly.
> Either your postmaster is getting wedged somehow, or there is a
> configure/install problem that has broken the postmaster's handling
> of child-process exit. What platform are you using, exactly? What
> if anything shows up in the postmaster log when this happens?

No, Tom.

It confused me too first. But with Zombie, he didn't meant
what you and me think a Zombie is. And it aren't postmaster
ones, it are regular backends that still run a huge query
where the client is already gone.

Jan

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