Re: [patch] executor and slru dtrace probes

From: Greg Smith <greg(at)2ndquadrant(dot)com>
To: Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM>
Cc: Bernd Helmle <mailings(at)oopsware(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org, Robert(dot)Lor(at)Sun(dot)COM, jesus(at)omniti(dot)com
Subject: Re: [patch] executor and slru dtrace probes
Date: 2009-12-15 17:10:09
Message-ID: 4B27C2F1.9020603@2ndquadrant.com
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Zdenek Kotala wrote:
> Bernd Helmle píše v po 14. 12. 2009 v 20:42 +0100:
>
>> Oh, and i was under the opinion the last discussions were about executor
>> probes only (note the patch is split up into two parts now, SLRU and
>> executor probes). The latter won't be fixed, but it seems the SLRU part at
>> least is ready.
>>
>
> I would like to add SimpleLruInit probe. I'm busy with PG packaging,
> but I hope that I will send updated version tomorrow.
>
I'd like to see as many of these DTrace probes as possible make it into
8.5, and it's great that you've picked up these older ones and updated
them. It looks like a lot of progress was made on actually measuring
the overhead of adding these probes in even when they're not enabled,
which is good.

But I'm afraid we're already out of time for this one if you're still
tweaking the probes here. With a functional change like that, our
normal process at this point would be to have the reviewer re-evaluate
things before they head to a committer, and I don't feel like this patch
is quite at 100% yet--in particular, the probe documentation is
improving but still a bit rough. I don't feel like we're quite ready to
mark this one for commit for this one, and today we really want to clear
the queue for things for committers to deal with. Please send that
updated version, and let's keep working on this into the next
CommitFest, where it will be in the front of the queue rather than how
it ended up at the tail of this one just based on its submission date.
You're not really getting a fair chunk of time here between your review
and the end here because of problems lining up reviewer time, that
shouldn't happen next time.

--
Greg Smith 2ndQuadrant Baltimore, MD
PostgreSQL Training, Services and Support
greg(at)2ndQuadrant(dot)com www.2ndQuadrant.com

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