On Fri, 2009-11-13 at 16:06 -0500, Tom Lane wrote:
> Zdenek Kotala <Zdenek.Kotala@Sun.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.
No ordinary user is going to use dtrace at all.
>
> If this goes in, I will disable dtrace support in Red Hat's builds,
> and I rather imagine that other packagers will react similarly.
Is it possible to have a set of probes that would only be enabled with
say, --enable-debug compile time option? I could certainly see the
benefit to these probes for profiling but that is such as specific use
that it seems to need a specific flag anyway.
Sincerely,
Joshua D. Drake
>
> regards, tom lane
>
--
PostgreSQL.org Major Contributor
Command Prompt, Inc: http://www.commandprompt.com/ - 503.667.4564
Consulting, Training, Support, Custom Development, Engineering
If the world pushes look it in the eye and GRR. Then push back harder. - Salamander
