Thanks Bob for sharing the REDBOOK details it is of good help to understand the process.
We are recording 19 in all LPARs. I think storage team uses it for their reporting using 20% or something, im not sure. My actual question still stands when i compare PROD and DEV SMFPRMxx then only diff i see is the SMF EXIT IEFU84. Is this exit heavy by itself or by poor coding ? is this affecting performance POST IPL as this EXIT takes control before each SMF Write. I need to raise a CHANGE if i want to remove it and test. So I was expecting to get a feedback from the LIST whether it worth a try. I have to give some justification in the CHANGE to request the removal. ________________________________ Thanks and Regards Shameem K Shoukath >________________________________ > From: Bob Rutledge <[email protected]> >To: [email protected] >Sent: Thursday, May 30, 2013 8:55 PM >Subject: Re: Longer SMFWAIT during IPL MSI > > >I suggest this Redbook: > >http://publib-b.boulder.ibm.com/abstracts/sg247816.html?Open > >Bob > >Shameem .K .Shoukath wrote: >> >> hi there, >> >> I was just going thru the IPL statistics of all LPARs in out org. I see in >>one LPAR the SMFWAIT is taking fairly longer comp to others. out of total >>00:01:12 MSI time this takes 00:00:53.586 >> >> I am not sure what happens in this process, took a chance & compared the >> SMFPRMxx and saw there is one exit IEFU84 additional compared to PROD and QA >> lpars. >> >> would this be the cause for slower IPL ? Will it also may be one reason >> contributing to performance issues? as i understand this exit gets control >> before each SMF write. >> >> >> >> >> *** IEEMB860 Statistics *** >> >> ILRTMRLG 00:00:00.278 ASM >> IEEVMSI 00:00:00.065 Reconfiguration >> IARM8MSI 00:00:00.030 RSM - bring storage online >> IECVIOSI 00:00:02.627 IOS dynamic pathing >> RACROUTE 00:00:00.000 Initialize Security Environment >> ATBINSYS 00:00:00.020 APPC >> IKJEFXSR 00:00:00.183 TSO >> IXGBLF00 00:00:00.029 Logger >> AXRINSTR 00:00:00.042 System REXX >> CEAINSTR 00:00:00.031 Common Event Adapter >> HWIAMIN1 00:00:00.067 BCPii >> COMMNDXX 00:00:00.091 COMMANDxx processing >> IEAVTMSI 00:00:00.071 RTM >> SMFWAIT 00:00:53.586 SMF >> ICHSEC05 00:00:12.113 Security Server >> MSIEXIT 00:00:00.000 Cnz_MSIExit Dynamic Exit >> IEFJSIN2 00:00:03.188 SSN= subsystem >> IEFHB4I2 00:00:00.015 ALLOCAS - UCB scan >> CSRINIT 00:00:00.005 Windowing services >> FINSHMSI 00:00:00.336 Wait for attached CMDs >> >> IEEMB860 00:01:12.797 Uncaptured time: 00:00:00.011 >> >> >> >> ________________________________ >> >> Thanks and Regards >> Shameem K Shoukath > >---------------------------------------------------------------------- >For IBM-MAIN subscribe / signoff / archive access instructions, >send email to [email protected] with the message: INFO IBM-MAIN > > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
