I would decrease the memroy for the linux (from 1024 to 512 mb) and use a vdisk as swap-space (512 mb). Then use xstorage for zvm-paging. Do monitoring (performance and memory utilization with vmstat/sar). If possible decrease the memory-size & swap-space for the linux-guest. Use fcon/esa for monitoring too. Your linux will page into the fast zvm vdisk. This should be no problem and is much better then using dasd as swap storage.
Martin Lonkwitz Unix Systems Engineer Servicepartner of Lufthansa Systems FRA AR/ISS Am Weiher 24 D-65451 Kelsterbach Tel: +49 (0)69 696 72456 Fax: +49 (0)69 696 91887 E-Mail: [EMAIL PROTECTED] Internet: www.LHsystems.com Es ist schwieriger eine vorgefasste Meinung zu zertruemmern als ein Atom. (Albert Einstein) -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Pieter Harder Sent: Donnerstag, 9. Dezember 2004 10:12 To: [EMAIL PROTECTED] Subject: Betr.: Notes 6.5.2 for zSeries. Can anyone help me? >i.e, every linux have a total memory of 1024 Mb and a swap area of 128 Mb. >Each Linux guest is running a Domino Server 6.5.2 with 400 mail users ( at >the end there will be five linux guests with 5000 mail users ). > >Now, we're having problems with VM paging. Here is a sample of our RTMGEN. > > DEV TYPE VOLSER IOREQST SEC %Q %ER R %LK LNK PA %UT ACC FPT DCT CN >%CN >0A25 3390 430PDI 9457 315 .00 .02 .00 0 4 63 2 0 1 0 >25 >0A33 3390 430P01 7958 265 .00 .00 .00 1 4 69 2 0 1 0 >23 > >Do you have any idea of we can do to solve this problem? You left out the the essential information: how much real do you have in the partition? Linux engines tend to use in real what you give them as Vsize. So if sum(Vsizes) >> available real, you are going to page whatever you do. Also, do you have xstore defined? If not the paging may be simply due to moves of real pages >2G to <2G. When there is no xstore CP has to do it via dasd paging. So what to do: - define some xstore if not yet defined for move around the bar. - shrink the total Vsize to something in range of the available real. - ensure you have ample paging packs. If you have only the two shown above that will probably not be enough. I myself routinely run ~300-400 pages/sec over 16 3390-3. No problem at all - if nothing helps evaluate the real available and hope Santa has a big budget to get you some more. Best regards, Pieter Harder [EMAIL PROTECTED] tel +31-73-6837133 / +31-6-47272537 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
