Guest operating systems almost always live in Q3. Try bumping up the Q3 STORBUF.
________________________________ From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Wakser, David Sent: Tuesday, December 21, 2010 10:21 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Strange response time problems (also posted on VSE-L) Already did that: q srm IABIAS : INTENSITY=90%; DURATION=3 LDUBUF : Q1=300% Q2=200% Q3=150% STORBUF: Q1=300% Q2=200% Q3=150% DSPBUF : Q1=32767 Q2=32767 Q3=32767 DISPATCHING MINOR TIMESLICE = 5 MS MAXWSS : LIMIT=9999% ...... : PAGES=999999 XSTORE : 0% From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Helmuth Teubl Sent: Tuesday, December 21, 2010 10:06 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Strange response time problems (also posted on VSE-L) Hi, maybe SRM-Settings not OK? You should overcommit LDUBUFs and STORBUFs The defaults are: CP Q SRM IABIAS : INTENSITY=90%; DURATION=2 LDUBUF : Q1=100% Q2=75% Q3=60% STORBUF: Q1=125% Q2=105% Q3=95% DSPBUF : Q1=32767 Q2=32767 Q3=32767 DISPATCHING MINOR TIMESLICE = 5 MS MAXWSS : LIMIT=9999% ...... : PAGES=999999 XSTORE : 0% LIMITHARD METHOD: DEADLINE Have a look, maybe try following settings: q srm IABIAS : INTENSITY=90%; DURATION=2 LDUBUF : Q1=300% Q2=200% Q3=100% STORBUF: Q1=300% Q2=275% Q3=250% DSPBUF : Q1=32767 Q2=32767 Q3=32767 DISPATCHING MINOR TIMESLICE = 5 MS MAXWSS : LIMIT=9999% ...... : PAGES=999999 XSTORE : 0% LIMITHARD METHOD: DEADLINE kind regards Helmuth Inactive hide details for David.Wakser---21.12.2010 15:54:15---All: We are running 2 2.3 VSE systems under z/VM 5.4 on a Z800 David.Wakser---21.12.2010 15:54:15---All: We are running 2 2.3 VSE systems under z/VM 5.4 on a Z800 CPU. Von: david.wak...@infocrossing.com An: IBMVM@LISTSERV.UARK.EDU Datum: 21.12.2010 15:54 Betreff: Strange response time problems (also posted on VSE-L) Gesendet von: IBMVM@LISTSERV.UARK.EDU ________________________________ All: We are running 2 2.3 VSE systems under z/VM 5.4 on a Z800 CPU. We are experiencing periods of time when VSEs do not respond at all (e.g. cannot get in via FAQS from CMS, etc.), even though nothing is running in the VSE system and the z/VM system is not very busy. At other times, we have excellent response times, though conditions on either the guests or the z/VM host didn't seem to change. We do not have any z/VM monitors (except Explore, which is not set up properly), and we have even tried QUICKDSP, without success. Is anyone aware of any PTFs that address this strange behavior? We believe it started when the system was upgraded to z/VM 5.4. David Wakser Confidentiality Note: This e-mail, including any attachment to it, may contain material that is confidential, proprietary, privileged and/or "Protected Health Information," within the meaning of the regulations under the Health Insurance Portability & Accountability Act as amended. If it is not clear that you are the intended recipient, you are hereby notified that you have received this transmittal in error, and any review, dissemination, distribution or copying of this e-mail, including any attachment to it, is strictly prohibited. If you have received this e-mail in error, please immediately return it to the sender and delete it from your system. Thank you. ---------------------------------------- Raiffeisen Informatik GmbH, Firmenbuchnr. 88239p, Handelsgericht Wien, DVR 0486809, UID ATU 16351908 Der Austausch von Nachrichten mit oben angefuehrtem Absender via E-Mail dient ausschliesslich Informationszwecken. Rechtsgeschaeftliche Erklaerungen duerfen ueber dieses Medium nicht ausgetauscht werden. Correspondence with above mentioned sender via e-mail is only for information purposes. This medium may not be used for exchange of legally-binding communications. ----------------------------------------
