We ran into the same issue. Our page space got up to 70% - 80% and we saw performance "go down the toilet". Our page volumes were on MOD-9's but only a third of each volume was usable because the page space had been defined as a MOD-3. We tried the DRAIN and that stopped using that page volume but didn't clear it. So we shut down all of our virtual machines and re-initialized the page space on the volumes we were using and now are sitting at 19% - 20% page utilization. Because they were production guests, we had to wait for our Sunday morning window to re-init our page volumes.
I was just wondering if there was another way to do what we did. We didn't want to add more volumes, we just needed to fix the ones we were using. Thanks for all of your help and ideas. Gene Nelson Federated Insurance Company 121 E. Park Square Owatonna, MN 55060 (507) 455-5200 ext. 4555706 -----Original Message----- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Marcy Cortes Sent: Tuesday, June 14, 2011 9:54 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: z/VM page space The question is why do you need to know? If you are running out of space, add more. If you can't, you'll have to shut virtual machines down. Start with the largest ones. BTW, don't let your paging space get more than 50% full or performance goes down the toilet. Marcy -----Original Message----- From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Bill Holder Sent: Tuesday, June 14, 2011 7:44 AM To: LINUX-390@vm.marist.edu Subject: Re: [LINUX-390] z/VM page space > In z/VM is there a way to tell who or what is using that page space? Coming from the z/OS world > I know there was a way to display show was the biggest user of the page slots. Is there a way > to do that in z/VM? I am unaware of any way to tell which users (or other pageable entities) have their pages on a given paging volume in z/VM. Bill Holder, Senior Software Engineer IBM z/VM Development, Memory Management, Endicott, NY Phone: 607-429-3640 IBM TieLine: 620-3640 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ The information contained in this e-mail message is intended only for the personal and confidential use of the designated recipient(s) named above. This message may be an attorney-client or work product communication which is privileged and confidential. It may also contain protected health information that is protected by federal law. If you have received this communication in error, please notify us immediately by telephone and destroy (shred) the original message and all attachments. Any review, dissemination, distribution or copying of this message by any person other than the intended recipient(s) or their authorized agents is strictly prohibited. Thank you. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
