make sure that your oracle SGA fits into your page cache. If it
doesn't, that will make you swap. Your ORACLE DBA ABSOLUTELY must be in
agreement on your configuration....
Martin, Terry R. (LOCKHEED MARTIN Performance Engineering/CTR) (CTR) wrote:
Hi Barton,
Thanks for the information. I will have two VDISKs for my z/Linux guests
already. I have found that when a z/Linux guest at least with my
workload starts to use SWAP it plows through it in no time so the extra
real disk for swap was to slow this down so that I could react quickly
to head of off running out of SWAP. In some cases with some of my Oracle
workload by the time I received the alert that the second VDISK was
being used it would have already been used up. My paging subsystem is
pretty robust as it stands and I do very little paging so far.
Thank You,
Terry Martin
Lockheed Martin - Information Technology
z/OS & z/VM Systems - Performance and Tuning
Cell - 443 632-4191
Work - 410 786-0386
terry.mar...@cms.hhs.gov
-----Original Message-----
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On
Behalf Of Barton Robinson
Sent: Wednesday, April 29, 2009 6:42 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: SWAPGEN
giving real disks to swap is a real waste of resource. It is much
better to take the "extra disk resource" that you allocate but never
want to use, and assign it to z/VM paging to enhance your paging
subsystem. Then define two vdisks for swap, prioritize them, and set an
alert when the 2nd disk is being used.
Martin, Terry R. (LOCKHEED MARTIN Performance Engineering/CTR) (CTR)
wrote:
Hi
I am using SWAPGEN to define by z/Linux VDISKS I also want to define a
real disk for swap. My question is can I use SWAPGEN to define a swap
on
real DASD? If you have an example of the control card syntax to
accomplish this that would be great?
//Thank You,//
//Terry Martin//
//Lockheed Martin - Information Technology//
//z/OS & z/VM Systems - Performance and Tuning//
//Cell - 443 632-4191//
//Work - 410 786-0386//
//terry.ma...@cms.hhs.gov <mailto:terry.ma...@cms.hhs.gov>//
