And are you using jumbo frames on your interconnect? That can make a significant contribution to reducing overhead from a system standpoint.
Thanks, Matt -- Matthew Zito GridApp Systems Email: [EMAIL PROTECTED] Cell: 646-220-3551 Phone: 212-358-8211 x 359 http://www.gridapp.com > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of K Gopalakrishnan > Sent: Thursday, July 10, 2003 11:44 AM > To: Multiple recipients of list ORACLE-L > Subject: RE: RAC system Calls > > > Ravi: > > Do you have a statspack report? I would like to see that. But > in any case, 45% kernel is just too much? > > BTW have you verified the private interconnect is used > for cache fusion transfer.. Make sure the cache fusion > is not going thru the public network. > > > > Best Regards, > K Gopalakrishnan > > > > > -----Original Message----- > Ravi Kulkarni > Sent: Thursday, July 10, 2003 9:30 AM > To: Multiple recipients of list ORACLE-L > > > Hello List, > > We are running Benchmark tests on Solaris 2-Node RAC. > Consistently noticed the following : > - Very high Kernel usage (averaging 45%) on TOP > - Statspack has "IPC Send Completion sync" waits (70% > Total ela time) > - On trussing top process, found Oracle to be issuing > huge number of "times" system calls in addition to > read/writes(which I think are select/inserts). Has anyone > noticed this in your environment. I am guessing these to be > inter-instance pings, but could not get any hits in > Doc/Metalink to confirm this. "times" call is clocking lot of > CPU. Is this normal ? > Any pointers would be helpful ? If this is out of > context, is there a separate list for RAC? > > Thanks, > Ravi. > > > > __________________________________ > Do you Yahoo!? > SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Ravi Kulkarni > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > 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). > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: K Gopalakrishnan > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > 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). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Matthew Zito INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- 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).
