RE: Virtual Circuit Status
Hi Erik, MTS uses a common queue for incoming requests (calls) to shared servers, and other queues for responses going back via a dispatcher. These queues and their clients constitute the virtual circuit. When a process is ready to take a request or response from its queue, but finds that there is nothing there, then it waits for 'virtual circuit status' to change. So, if you're using MTS and you're not spending a lot of time in this wait event, then that indicates that your requests and responses are being delayed by queue time (which incidentally is not yet picked up by StatsPack, although it is in the V$ views, nor is it visible in the trace files because the waiting session does not have a corresponding process that is waiting). @ Regards, @ Steve Adams @ http://www.ixora.com.au/ - For DBAs @ http://www.christianity.net.au/ - For all -Original Message- Williams Sent: Thursday, 28 August 2003 4:49 AM To: Multiple recipients of list ORACLE-L Has anyone run into excessive waits on this event? After running my statspack through oraperf.com, I see that I am waiting ~80% of response time on this event. I have read on metalink that this is NOT an idle event, and on asktom.oracle.com that it IS an idle event. We have MTS configured, but all the clients are set to use dedicated server. Should I try reduce this event by tuning MTS or is it truely an idle event? Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Steve Adams 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).
RE: Virtual Circuit Status/wecome back
Steve, Welcome back, we all were missing your participation for long time... Regards Rafiq Reply-To: [EMAIL PROTECTED] To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Thu, 28 Aug 2003 04:39:47 -0800 Hi Erik, MTS uses a common queue for incoming requests (calls) to shared servers, and other queues for responses going back via a dispatcher. These queues and their clients constitute the virtual circuit. When a process is ready to take a request or response from its queue, but finds that there is nothing there, then it waits for 'virtual circuit status' to change. So, if you're using MTS and you're not spending a lot of time in this wait event, then that indicates that your requests and responses are being delayed by queue time (which incidentally is not yet picked up by StatsPack, although it is in the V$ views, nor is it visible in the trace files because the waiting session does not have a corresponding process that is waiting). @ Regards, @ Steve Adams @ http://www.ixora.com.au/ - For DBAs @ http://www.christianity.net.au/ - For all -Original Message- Williams Sent: Thursday, 28 August 2003 4:49 AM To: Multiple recipients of list ORACLE-L Has anyone run into excessive waits on this event? After running my statspack through oraperf.com, I see that I am waiting ~80% of response time on this event. I have read on metalink that this is NOT an idle event, and on asktom.oracle.com that it IS an idle event. We have MTS configured, but all the clients are set to use dedicated server. Should I try reduce this event by tuning MTS or is it truely an idle event? Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Steve Adams 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). _ Get MSN 8 and help protect your children with advanced parental controls. http://join.msn.com/?page=features/parental -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: M Rafiq 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).
RE: Virtual Circuit Status
There is no such thing as an idle event. If it consumes someone's response time, then you have to deal with it. If it tallies time that's not part of someone's response time, then ignore it. The key is to collect session-level data for exactly the time interval during which the observed session is having a performance problem. The ambiguous answers you're finding all boil down to whether you've collected your data properly or not. If you've collected your data improperly, then it's an idle event. If you've collected your data properly (re: paragraph 2), then it's not. Cary Millsap Hotsos Enterprises, Ltd. http://www.hotsos.com Upcoming events: - Hotsos Clinic 101 in Sydney - Hotsos Symposium 2004, March 7-10 Dallas - Visit www.hotsos.com for schedule details... -Original Message- Erik Williams Sent: Wednesday, August 27, 2003 1:49 PM To: Multiple recipients of list ORACLE-L Has anyone run into excessive waits on this event? After running my statspack through oraperf.com, I see that I am waiting ~80% of response time on this event. I have read on metalink that this is NOT an idle event, and on asktom.oracle.com that it IS an idle event. We have MTS configured, but all the clients are set to use dedicated server. Should I try reduce this event by tuning MTS or is it truely an idle event? Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Cary Millsap 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).
