RE: Unix memory used

Just from looking at what you've described, you don't use the memory you have on the machine. But I'm on the outside looking in. If your databases are memory bound, my recommendation is to look into tuning your database memory first, and expanding each SGA.

I'm also assuming that this is only a database server.

Michael Armstead
Database Administrator, OCP-Certified
Corporate & Finance Information Systems
Glaxo SmithKline

> -----Original Message-----
> From: Lanteigne, Mike [SMTP:MLanteigne_at_edc-see.ca]
> Sent: Wednesday, April 04, 2001 9:51 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Unix memory used
>
> Hello list,
>
> We have a Sun e3500 with 4x300 MH processors, 1 GB Ram and OS 2.6.
> The server runs 4 small instances ( 7.3.4.5), two PeopleSoft apps and one
> more help desk app. As the below shows, or SGA's are very small (same for
> all 4 databases):
>
> SVRMGR> show sga
> Total System Global Area 6278336 bytes
> Fixed Size 39816 bytes
> Variable Size 4567352 bytes
> Database Buffers 1638400 bytes
> Redo Buffers 32768 bytes
>
> I'm looking for some ammunition to make a case to increase the RAM.
> Yes, some database response is slow, however before I start tuning,
> especially memory sizes, I really think any efforts will be wasted if the
> memory is constantly thrashing to disk. I've been given access to top, and
> it reports the following:
>
> Memory: 1024M real, 15M free, 198M swap in use, 571M swap free (at
> 8:30 am on weekday)
>
> I guess I'm asking if I can say with validity that our memory is
> presently being used up, and the "198 MB swap in use" is a real number.
> Also, our SAs don't monitor memory use, so if anyone has any good tool,
> tricks, book references, etc...that I can use to see this kind of thing,
> I'd
> appreciated it.
>
> Thanks,
>
> Mike Lanteigne
>
> The views expressed here are mine and do not reflect the official position
> my employer or the organization through which the internet was accessed.
>
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> Please see the official ORACLE-L FAQ: http://www.orafaq.com
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> Author: Lanteigne, Mike
> INET: MLanteigne_at_edc-see.ca
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Armstead, Michael A
  INET: maa25681_at_GlaxoWellcome.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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