Re: RAMSAN Experience
- From: Jakub Wartak <vnulllists@xxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx, Rob.Dempsey@xxxxxxxxxx
- Date: Wed, 9 Sep 2009 20:17:23 +0200
Dnia środa, 9 września 2009 17:29, Rob Dempsey napisał:
> We use EMC storage however the latest idea is to use RAMSAM for the
> temporary files. I always thought it might be a good idea for the redo logs
> but I am not sure about the TEMP files.
>
> Like I said we have a number of constraints, but any help would be welcome.
Ron,
You raw need numbers. Enable SAR statistics collection for this LUN/fs with
only temporary datafiles. Let it run for min 3 days with 5 minute resolution
to collect data. Then you could grep SAR output for exact LUN/fs for these 3
days (using -f switch) and you would end up with data something like reads/s,
writes/s, Kbs/s, avwait and avserv. Based on that values then you would
decide what to do next...
Also you can look at this data in real-time: iostat -x is your friend.
How big is your PGA and SGA? What does PGA advisor tells you? What is your OS
platform?
--
Jakub Wartak
http://vnull.pcnet.com.pl
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