RE: RAC system Calls

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).