No, it's linear. But I would be DEATHLY AFRAID of a system that made one of my production servers 10,000 times more share than another production server. This could easily cause one server to be delayed by minutes, not just seconds and would REALLY make intel servers look good. The logic boggles the mind.
>Date: Fri, 9 Jun 2006 08:51:07 -0400 >From: "Stracka, James (GTI)" <[EMAIL PROTECTED]> > >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 > > > > > >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 can't measure it, I'm Just NOT interested!"(tm) /************************************************************/ Barton Robinson - CBW Internet: [EMAIL PROTECTED] Velocity Software, Inc Mailing Address: 196-D Castro Street P.O. Box 390640 Mountain View, CA 94041 Mountain View, CA 94039-0640 VM Performance Hotline: 650-964-8867 Fax: 650-964-9012 Web Page: WWW.VELOCITY-SOFTWARE.COM /************************************************************/
