Personally, I would say that it depends. My last gig on a small 2-way I was standing on my head with the Policy to make it work due to capacity limitations. I had all kinds of stuff in IMP 1. Now I'm currently supporting a very large plex with many disparate sizes, shapes, workloads. Some LPARs have very little IMP 1 and others have a little more. As long as the the PI's are met and the clients are happy I go with what works.
--- On Tue, 11/24/09, Mark Zelden <mark.zel...@zurichna.com> wrote: From: Mark Zelden <mark.zel...@zurichna.com> Subject: Re: WLM Imp1 To: IBM-MAIN@bama.ua.edu Date: Tuesday, November 24, 2009, 1:56 PM On Tue, 24 Nov 2009 09:10:34 +0000, Martin Packer <martin_pac...@uk.ibm.com> wrote: >Further, most shops I know run with a fair amount of Importance 1. >There're no indications they're wrong. > >So I'd like to understand where the "No WLM Importance 1" advice came >from. > A well known performance expert used to recommend that. But it wasn't "NO" importance=1, it was that imp=1 should only be used or emergency work and your "bread and butter" application(s). So I understand where the recommendation comes from. 10-15 years ago I had a lot of consulting gigs doing WLM tuning (some were conversions to WLM). I would say the majority of shops I went into way overused IMP=1 and at the same time underused IMP=5. So I happen to agree with that basic philosophy. There is very little IMP=1 work here. WebSphere enclaves and the DB2 DDF period 1 enclaves that support the same core applications. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:mark.zel...@zurichna.com z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
