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Re: LISTEN/NOTIFY benchmarks?

From: prashanth(at)jibenetworks(dot)com
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: LISTEN/NOTIFY benchmarks?
Date: 2003-04-30 00:27:35
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On Tue, Apr 29, 2003 at 06:21:15PM -0400, Tom Lane wrote:
> prashanth(at)jibenetworks(dot)com writes:
> > If the listening backend had registered tens of thousands of LISTENs,
> > it would be sent an equivalent number of signals during a single run
> > of AtCommit_Notify().
> Not unless the notifier had notified all tens of thousands of condition
> names in a single transaction.

Unfortunately, that is a possibility in our application.  We are now
working around this non-scalability.

Regardless, it would seem redundant to send more than one SIG_USR2 to the
recipient backend in that loop.

-- prashanth

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