RE: Timestamps in trace files

From: Cary Millsap <cary.millsap_at_hotsos.com>
Date: Thu, 24 Jul 2003 07:55:30 -0500
Message-Id: <26007.339417@fatcity.com>

Ah. I think that the kernel will only emit a timestamp line immediately before writing a db call or wait event to the trace data. This is a similar trigger to the one that the kernel uses for writing a PARSING IN CURSOR (PIC) section to the trace stream. You'll only see the PIC section immediately preceding a database call line. You'll see timestamps immediately preceding either a database call line or a WAIT line.

Cary Millsap
Hotsos Enterprises, Ltd.
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-----Original Message-----
From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On Behalf Of Daniel Fink
Sent: Wednesday, July 23, 2003 10:04 AM
To: Multiple recipients of list ORACLE-L Subject: Re: Timestamps in trace files

Gudmundur,

	Where is this documented (so I can RTFM)?
	The one piece of this I don't quite understand is that the timestamp

is not emitted twice in a row. If the long time is the triggering event, why do I see a gap of 90 minutes (in another trace file)?

Daniel

Gudmundur Bjarni Josepsson wrote:
>
> Daniel,
>
> Perhaps someone else can explain this better but the documentation I've
> got on this says that the Oracle kernel emits timestamps when a long
> time has elapsed since the last line was emitted to the trace file.
> Long time is defined as tens of seconds.
>
> Gudmundur
>
> > -----Original Message-----
> > From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On
> > Behalf Of Daniel Fink
> > Sent: 22. júlí 2003 21:19
> > To: Multiple recipients of list ORACLE-L
> > Subject: Timestamps in trace files
> >
> >
> > I was perusing a 10046 trace file and I noticed that
> > timestamps are written to the trace file. Sometimes they were
> > very regular (3 minutes apart give or take 30 seconds) while
> > other times they were hours apart. I have noticed that two
> > timestamps are never written without any intervening
> > activity. Anyone have any idea on the reasoning behind the
> > timestamps and the 'triggering event'?
> >
> > Daniel
> >
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Gudmundur Bjarni Josepsson
> INET: gbj_at_index.is
>
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Received on Thu Jul 24 2003 - 07:55:30 CDT