I'm sorry. That is not what we did. We shut down the z/VM LPAR as well. So our linux guests were down as well as z/VM when we re-initialized our page volumes.
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 Bill Holder Sent: Wednesday, June 15, 2011 4:44 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: z/VM page space > 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 >Gene, so are you saying you reformatted "live" paging volumes >while they were still attached to the system? That is not really very >safe, even if all of the guests have been logged off - CP itself has >some pageable structures that could well be lost, potentially >causing a latent abend that would occur at some later time. >I suppose if you verified that usage of the volumes in question >had really gone completely to zero before re-initializing, that >might be "safe enough", but it still seems rather dicey - we make >no promises about when or why CP might choose to page >something out (yes, the overwhelming majority of cases are >when storage is full and the system starts paging, which isn't >going to happen with all of the guests logged off, but there are >a few other oddball cases that could happen when the system >is not otherwise paging). > >- Bill > >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/ 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/
