RE: Virtual Circuit Status/wecome back

Steve,

Welcome back, we all were missing your participation for long time...

Regards
Rafiq

Reply-To: ORACLE-L_at_fatcity.com
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> 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

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Author: M Rafiq
  INET: rafiq9857_at_hotmail.com

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