SUMMARY:m paging activities on solaris

From: Cheng, Bruce (Bruce.Cheng@Aspect.com)
Date: Wed Jul 22 1998 - 15:07:10 CDT


Here is a summary of the replies I got about paging activites on
solaris.

Thanks all!
-Bruce

>----------
>From: SALLEA@kben.co.uk[SMTP:SALLEA@kben.co.uk]
>Sent: Wednesday, July 22, 1998 9:33 AM
>To: Cheng, Bruce
>Subject: RE: paging activities on solaris
>
>
>if you use --> vmstat 5
>
>And watch the SR field (scan rate) , if this is consistently non-zero, then
>you have a memory shortage...
>
>Rgds, Alex

>----------
>From: Steve Phelps[SMTP:phelpss@ozemail.com.au]
>Sent: Tuesday, July 21, 1998 12:19 AM
>To: Cheng, Bruce
>Subject: Re: paging activities on solaris
>
>>How do I find out if a server is paging too much?
>>I tried to use sar -p 30 30 and I do not see much activity there. I
>>wonder if the tool is working.
>
>
>If you're looking for a RAM shortage then examine the 'sr' column of 'vmstat
>5 100'. If it is consistently > 0 then you may have a RAM shortage.
>
>File I/O in Solaris will show up as paging so you're probably not after
>paging stats.
>
>See Adrian Cockcroft's columns at Sun World Online
>
>http://www.sun.com/sunworldonline/
>
>Go to back issues. There's plenty of stuff there on how Solaris "swapping"
>works.
>

>----------
>From: Coffindaffer, Virginia[SMTP:Virginia.Coffindaffer@wang.com]
>Sent: Monday, July 20, 1998 1:23 PM
>To: Cheng, Bruce
>Subject: RE: paging activities on solaris
>
>Have you tried "vmstat" and looked at page-in and page-out ?
>
> VAC
>virginia.coffindaffer@wang.com
>
>> ----------

>----------
>From: Charlie Mengler[SMTP:charliem@anchorchips.com]
>Sent: Monday, July 20, 1998 1:02 PM
>To: Cheng, Bruce
>Subject: Re: paging activities on solaris
>
>I contend that sar -g & looking at pgscan/s is a more reliable metric.
>Ideally it should be "low" (<10; or single digit midget). If it stays
>above 100 for any length of time, the box could benefit from more
>memory.

>----------
>From: Ed Finch[SMTP:efinch@eos.hitc.com]
>Sent: Monday, July 20, 1998 12:42 PM
>To: Cheng, Bruce
>Subject: Re: paging activities on solaris
>
>Cheng, Bruce wrote:
>
>> How do I find out if a server is paging too much?
>> I tried to use sar -p 30 30 and I do not see much activity there. I
>> wonder if the tool is working.
>>
>> vmstat -s shows me some paging information but I would like to hear how
>> other people does it?
>
>I will release SARGE in about a week; see http://www.vais.net/~efinch for
>more information.
>
>Regards,
>Ed
>

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