From Rajendra.Jamadagni@espn.com Thu, 10 Jul 2003 09:21:37 -0700 From: "Jamadagni, Rajendra" Date: Thu, 10 Jul 2003 09:21:37 -0700 Subject: RE: RAC system Calls Message-ID: MIME-Version: 1.0 Content-Type: text/plain Title: RE: RAC system Calls You seem to have timed_statistics=TRUE right ?? in RAC you will ALWAYS see GCS pings ... basically as long as cluster_database=true, even if only one node is running, you will still see Oracle trying to ping other instances. My guess is that's what is happening ... but I could be very well wrong, I have RAC experience, but never tried to truss the top processes. Raj -------------------------------------------------------------------------------- Rajendra dot Jamadagni at nospamespn dot com All Views expressed in this email are strictly personal. QOTD: Any clod can have facts, having an opinion is an art ! -----Original Message----- From: Ravi Kulkarni [mailto:[EMAIL PROTECTED]] Sent: Thursday, July 10, 2003 12:30 PM To: Multiple recipients of list ORACLE-L Subject: RAC system Calls 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). *********************************************************************This e-mail message is confidential, intended only for the named recipient(s) above and may contain information that is privileged, attorney work product or exempt from disclosure under applicable law. If you have received this message in error, or are not the named recipient(s), please immediately notify corporate MIS at (860) 766-2000 and delete this e-mail message from your computer, Thank you.*********************************************************************1