Re: odd iostat graph

From: Alan McKay <alan(dot)mckay(at)gmail(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: odd iostat graph
Date: 2009-09-11 20:31:18
Message-ID: 844129e80909111331s61fd9aebo4957ea2c84a231c9@mail.gmail.com
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> What's the scale on the bottom there?  The label says "by week" but the way
> your message is written makes me think it's actually a much smaller time
> frame.  If those valleys are around around five minutes apart, those are the
> checkpoints finishing; the shape of the graph is right for it to be those.

No, that's about 6 days of stats.
The numbers 04, 05, 06 are Sept 04, 05, 06 ...

This is the part I found oddest - that this takes place over such a
huge timeframe!

Munin takes a snapshot every 5 minutes, and this graph shows it
averaged over that timeframe.

--
“Don't eat anything you've ever seen advertised on TV”
- Michael Pollan, author of "In Defense of Food"

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