We are Considering Upgrading from 8.1.7.2 to 8.1.7.4 on AIX 4.3.3 Any Do's,Cares to be Taken ? Any Advice / Serious Bugs known on this Patch Version ?
Thanks -----Original Message----- Sent: Wednesday, July 10, 2002 8:49 PM To: LazyDBA.com Discussion After migration from Oracle ver 7.3.4 to 8.1.7.2 (32-bit) , %wio (%iowait) on Database Machine Exceedingly High i.e. about 60 % . NOTE - This is a Live Production Site . AIX 4.3.3 Storage Box = SSA Class Storage (7133-D40 Model) Machine S85 P-Series Application - Banking (Hybrid) SAMPLE Output Below %iowait = 60.5 % - (Detailed Output file Attached ) tty: tin tout avg-cpu: % user % sys % idle % iowait 1.2 10.0 8.9 21.8 8.9 60.5 Disks: % tm_act Kbps tps Kb_read Kb_wrtn hdisk0 0.7 4.0 0.8 0 240 hdisk1 1.1 5.8 1.0 12 336 hdisk3 0.0 0.0 0.0 0 0 hdisk9 0.0 0.0 0.0 0 0 hdisk6 0.0 0.0 0.0 0 0 hdisk2 1.0 4.0 0.8 0 240 hdisk4 0.0 0.0 0.0 0 0 hdisk5 0.0 0.0 0.0 0 0 hdisk11 80.4 449.1 66.6 22292 4656 hdisk7 91.0 964.4 145.9 37868 19996 hdisk10 65.5 491.5 78.4 22916 6576 hdisk13 95.5 914.3 127.2 25656 29200 hdisk14 93.5 869.1 129.5 22824 29320 hdisk15 97.9 960.8 152.6 35620 22028 hdisk16 98.4 1382.8 174.7 53112 29856 hdisk8 75.0 802.9 119.4 40816 7360 cd0 0.0 0.0 0.0 0 0 ------------------------------------------------------------------------------------ COMMENTS of Hardware Engineer :- =============================== >From the perfpmr data collected on July 5th and it has been analysed by our Labs. The performance degradation is caused by fsync() routines called by Oracle processes. In 5 secs trace, fsync was called 276 times and consumed 21.39% CPU system time. The fsync() blocks the process until all the dirty pages are written to the physical disks. We checked the old perfpmr data collected with Oracle 7.3.4.5, it doesn't have this issue. Oracle has a fix to address the fsync problem on 8.1.7.2 (64-Bit) & 8.1.7.4 (32-Bit). ------------------------------------------------------------------------------------- WE HAVE INITIATED WITH ORACLE CORP FOR A PATCH ON 8.1.7.2 32-BIT. Nevertheless Any Other Ideas just in case the Patch Does NOT bring Down the %wio Enough ? NOTE - High %wio has been Observed only on AIX O.S. (NOT Other O.S.) post migration to Oracle 8.1.7.2 -------- Oracle documentation is here: http://tahiti.oracle.com/pls/tahiti/tahiti.homepage To unsubscribe: send a blank email to [EMAIL PROTECTED] To subscribe: send a blank email to [EMAIL PROTECTED] Visit the list archive: http://www.LAZYDBA.com/odbareadmail.pl Tell yer mates about http://www.farAwayJobs.com By using this list you agree to these terms:http://www.lazydba.com/legal.html -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: VIVEK_SHARMA INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).