| From: | Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl> |
|---|---|
| To: | Josh Berkus <josh(at)agliodbs(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Wierd performance issue with 8.1cvs |
| Date: | 2005-04-20 18:31:11 |
| Message-ID: | 20050420183111.GA2225@dcc.uchile.cl |
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| Lists: | pgsql-hackers |
On Wed, Apr 20, 2005 at 11:09:19AM -0700, Josh Berkus wrote:
> At OSDL we're seeing a wierd performance crash on 8.1cvs. What's wierd about
> it is that it doesn't happen all the time -- about 1 out of 4 test runs.
> What it looks like happens sometimes is that performance drops dramatically
> at the first checkpoint, and never comes back. But there's oprofiles and
> things to make a more insightful analysis:
What is the "wait" line in the Processor Utilization graphic? Does it
have anything to do with spinlocks? Was it so high in 8.0 tests?
--
Alvaro Herrera (<alvherre[(at)]dcc(dot)uchile(dot)cl>)
Jude: I wish humans laid eggs
Ringlord: Why would you want humans to lay eggs?
Jude: So I can eat them
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