Re: [PATCH] dtrace probes for memory manager

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM>
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH] dtrace probes for memory manager
Date: 2009-11-13 21:06:16
Message-ID: 9666.1258146376@sss.pgh.pa.us
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Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM> writes:
> Attached patch contains new dtrace probes for memory management.

This is a bad idea and I want to reject it outright. No ordinary user
is really going to care about those details, and palloc is a
sufficiently hot hot-spot that even the allegedly negligible overhead
of an inactive dtrace probe is going to cost us.

If this goes in, I will disable dtrace support in Red Hat's builds,
and I rather imagine that other packagers will react similarly.

regards, tom lane

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