Re: RAMSAN Experience

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
--
http://www.freelists.org/webpage/oracle-l

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