Message-ID: <F001.005CDC0B.20030828080927@fatcity.com>
Date: Thu, 28 Aug 2003 08:09:27 -0800
To: Multiple recipients of list ORACLE-L <ORACLE-L@fatcity.com>
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From: "M Rafiq" <rafiq9857@hotmail.com>
Subject: RE: Virtual Circuit Status/wecome back
Organization: Fat City Network Services, San Diego, California
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Steve,

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

Regards
Rafiq


Reply-To: ORACLE-L@fatcity.com
To: Multiple recipients of list ORACLE-L <ORACLE-L@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: Steve Adams
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: M Rafiq
  INET: rafiq9857@hotmail.com

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