I thought SHARE was more logarithmic than linear, so it would be much worse than 100-to-1. Or am I confusing that with something else?
-----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Mark Wheeler Sent: Thursday, June 08, 2006 4:54 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Anyone use VMRM? Leland, I used it for over a year but recently turned it off and went back to using staticly-defined share settings. I found it to be generally sluggish to respond to changing workloads (although I made some mods to make it moreso). In practice, my observation was that when the system got busy, it tended to raise every managed virtual machines' SHARE setting to REL 10000 (because they weren't getting the resources they needed). Conversely, if the system was running fine, it tended to lower the managed virtual machines' SHARE settings to REL 1 (for the opposite reason). The latter situation was even worse because if some virtual machine with a SHARE REL 100 decided to get busy all of a sudden, it could be a long time before VMRM reacted to raise the important workload back up (in the meantime, running at a 100-to-1 disadvantage). I moderated this effect with mods which set limits on the SHARE setting changes so as not to go lower than 50 or higher that 5000. In the end, the downsides (significant) outweighed the benefits (if any). Best regards, Mark Wheeler, 3M Company Leland Lucius <[EMAIL PROTECTED] NET> To Sent by: The IBM IBMVM@LISTSERV.UARK.EDU z/VM Operating cc System <[EMAIL PROTECTED] Subject ARK.EDU> Anyone use VMRM? 06/08/2006 03:37 PM Please respond to The IBM z/VM Operating System <[EMAIL PROTECTED] ARK.EDU> So, how do you folks feel about VMRM? Does it work as advertised? Like David B., I'm "fundamentally lazy" and don't want to have to sit around and baby sit these funny looking birds. Sure, initial hand holding would be required, but after that I want the system to take care of things for me. Thanks, Leland -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------
