Oracle-L: RE: Waits 8i vs. 9i??

From: Cary Millsap <cary.millsap_at_hotsos.com>
Date: Thu, 16 May 2002 10:33:48 -0800
Message-ID: <F001.00462AD7.20020516103348@fatcity.com>

You might notice more total event completions in 9i because there are about 50% more segments of kernel code that are instrumented in 9i than there were in 8i (~200 events in 8i, ~300 in 9i).

Clock granularity is 0.01 in 8i, so events that complete in the same 0.01-sec quantum as they began will register ela=0 in the trace data ("WAITED SHORT TIME"). But Oracle tallied a completion for every completed event, even if there were several completions of the same event within the same quantum. In 9i, the clock granularity is 0.000001, so you'll get more non-zero times in 9i, but the number of event completions reported for a given sequence of events will remain the same.

Cary Millsap
Hotsos Enterprises, Ltd.
cary.millsap_at_hotsos.com
http://www.hotsos.com

-----Original Message-----
Rajendra
Sent: Thursday, May 16, 2002 1:06 PM
To: Multiple recipients of list ORACLE-L

Isn't that something to do with 9i being able to report wait times in nanoseconds instead of (milliseconds? or microseconds?) in previous versions
??

Raj

Rajendra Jamadagni MIS, ESPN Inc.
Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.

QOTD: Any clod can have facts, but having an opinion is an art!

-----Original Message-----
Sent: Thursday, May 16, 2002 12:20 PM
To: Multiple recipients of list ORACLE-L

Internal code changes= additional features=fine grained (event) reporting?

Best Regards,
K Gopalakrishnan
Bangalore, INDIA

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Author: Cary Millsap
INET: cary.millsap_at_hotsos.com

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