Thanks all for your answers -----Original Message----- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Tore Agblad Sent: Thursday, April 07, 2016 1:50 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: linux memory
Just tell them they got what they need, they don't need to try figure that out. Then give each server a std size at start for ex 4G and max mem 8G, so you can add the remaining 4G on the fly at need. Then adjust memory so it's not using swap, or very little of it. We have servers with total memory size from 512MB up to 28GB. Almost everyone have two small 128M vdisk as swap and one physical 500MB swap just in case. That is the optimal, often it may vary so sometimes swap is heavily used. IF you want to use the SUSPEND feature in z/VM for a guest you need a disk with same size as max mem, and I think the swap disk is the std place for it. You might be able to point out another disk, haven't checked. Tore Agblad Infrastructure Development ProfessionalD HCL Technologies Ltd. DA1S Gunnar Engellaus väg 3, 418 78 Gothenburg, Sweden www.hcltech.com www.hcl.com ________________________________________ Från: Linux on 390 Port [LINUX-390@VM.MARIST.EDU] för Levy, Alan [al...@doitt.nyc.gov] Skickat: den 6 april 2016 16:41 Till: LINUX-390@VM.MARIST.EDU Ämne: linux memory Hopefully someone can resolve an argument that I'm having with a colleague. We are competing with the distributed side which using VMware to create sles linux servers. They create servers with 8G of memory and 8G of swap for EVERY server. My colleague wants to follow this architecture for our zvm servers (giving them 8G of memory and 8G of vdisk). My opinion is to give them a default of 2G of memory and 2G of vdisk and increase the main memory as needed. My colleague is concerned that if we give them less, they will always go to the distributed side since they give more. I am concerned about giving so much memory might negatively impact our zvm systems. ________________________________ This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by replying to this e-mail and delete the e-mail from your system. ---------------------------------------------------------------------- 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/ ::DISCLAIMER:: ---------------------------------------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. ---------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------- 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/
