Comments for Memory Behavior when VM Limits are Set at http://www.vmguru.com , comment 1 to 5 out of 5 comments http://www.vmguru.com Sat, 13 Mar 2010 07:19:35 +0100 FeedCreator 1.7.3 http://www.vmguru.com/index.php/articles-mainmenu-62/mgmt-and-monitoring-mainmenu-68/96-memory-behavior-when-vm-limits-are-set#comment-18 This is true in a normal less memory intensed apps to leave the default settings as default. However when we look at SAP environments, where in we may have to allocate 20-25GB of RAM to each VM, i suggest to reserve the whole memory allocate dand also set the limit as same. So the swap file will not created always on every reboot and may improve a better performance during normal load and also during reboot. My 2 c. - Udaya Wed, 09 Sep 2009 03:16:04 +0100 http://www.vmguru.com/index.php/articles-mainmenu-62/mgmt-and-monitoring-mainmenu-68/96-memory-behavior-when-vm-limits-are-set#comment-12 Hi Everyone. I can think of a few scenarios, All in which the deployment and memory assignment are not controlled solely by the responsible and knowledgeable administrator: Maybe an R&D environment, Where the users (Meaning: developers, Etc.) are deploying test/R&D servers and are confident that they need 16GB per server (No matter how much you tell them or show them it's not the case). Or maybe a customer with a not-so-educated administrator. In this case, It might be an option to assign 16GB Per server, Limit the VM to 2GB and 16GB-2GB is from swp file, Getting everyone happy. I can see by your explanation this is not a very good idea, But for general purpose, It's something that can happen - Since after all we are not living in a class or a book. How would you suggest solving this, Given the 8 (Political) layer ? - Sharon Wed, 13 May 2009 22:42:42 +0100 http://www.vmguru.com/index.php/articles-mainmenu-62/mgmt-and-monitoring-mainmenu-68/96-memory-behavior-when-vm-limits-are-set#comment-11 Hi, thanks for this article. Anyway, do you have a scenario why anyone would set Memory Limit smaller then Configured memory, instead of lowering configured memory in the first place? Harry - Harry Sun, 03 May 2009 00:49:23 +0100 http://www.vmguru.com/index.php/articles-mainmenu-62/mgmt-and-monitoring-mainmenu-68/96-memory-behavior-when-vm-limits-are-set#comment-10 Dennis, Feel free to print it up and staple it to their back when they leave! DON'T change default values unless you have a damn good reason to! EVER. :) - Scott Herold Mon, 27 Apr 2009 11:53:47 +0100 http://www.vmguru.com/index.php/articles-mainmenu-62/mgmt-and-monitoring-mainmenu-68/96-memory-behavior-when-vm-limits-are-set#comment-9 Thanks for writing this up! I have been telling my VCP students and clients for years to simply lower the configured RAM on their VM's rather than set a limit. Your post will help as collateral. - Dennis Bray Mon, 27 Apr 2009 11:32:26 +0100