The main culprits are WMB (now called IIB) Execution Groups that are not well behaved from a memory management perspective. I agree that all we need is a recycle of these EGs but management is still concerned about potential z/VM and zLinux memory problems if we don't IPL.
Chris Will -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Gentry, Steve Sent: Wednesday, May 27, 2015 10:40 AM To: [email protected] Subject: Re: Are weekly z/VM IPLs necessary? While we do not currently run z/Linux, we rarely IPL z/VM. Even in a previous work environment, we rarely would IPL z/VM. The IPL would usually occur at the Spring and Fall time change. But with changes to z/VM, we don't have to do that anymore. Do you really need to cycle z/Linux or is it maybe just a couple of apps that might need to be cycled? Granted, sometimes, it is just easier to cycle the operating system. Steve -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Will, Chris Sent: Wednesday, May 27, 2015 10:34 AM To: [email protected] Subject: Are weekly z/VM IPLs necessary? We have gotten in the habit of IPLing our z/VM and zLinux guests every Sunday during our standalone window. With the window shrinking and the need for 24/7 availability is it really necessary to IPL every week? If not what potential problems could we run into by not doing the IPL (memory leaks, logs filling etc.). This is in comparison to the Intel side of the shop (Red Hat, Windows) where they go months between IPLs. The only benefit I see is the opportunity to recycle WMB execution groups. Chris Will The information contained in this communication is highly confidential and is intended solely for the use of the individual(s) to whom this communication is directed. If you are not the intended recipient, you are hereby notified that any viewing, copying, disclosure or distribution of this information is prohibited. Please notify the sender, by electronic mail or telephone, of any unintended receipt and delete the original message without making any copies. Blue Cross Blue Shield of Michigan and Blue Care Network of Michigan are nonprofit corporations and independent licensees of the Blue Cross and Blue Shield Association. ---------------------------------------------------------------------- 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 more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- 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 more information on Linux on System z, visit http://wiki.linuxvm.org/ The information contained in this communication is highly confidential and is intended solely for the use of the individual(s) to whom this communication is directed. If you are not the intended recipient, you are hereby notified that any viewing, copying, disclosure or distribution of this information is prohibited. Please notify the sender, by electronic mail or telephone, of any unintended receipt and delete the original message without making any copies. Blue Cross Blue Shield of Michigan and Blue Care Network of Michigan are nonprofit corporations and independent licensees of the Blue Cross and Blue Shield Association. ---------------------------------------------------------------------- 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 more information on Linux on System z, visit http://wiki.linuxvm.org/
