In general There are two problems in using the "top five waits" out of statspack: it
reports idle waits; no matter how well-tuned your database there will always be a top
five. The numbers presented show total time-waited in csecs for the time period. As
Jared said we don't know the time period. We don't know the average wait time.
I have learned some rudimentary gnuplot skills. Each morning I produce graphs of
what went on the in the databases the previous day on and hour by hour basis. If
something is really askew I break the hour down into ten minute blocks. This helps
me to better recognize patterns of database usage.
Ian MacGregor
Stanford Linear Accelerator Center
[EMAIL PROTECTED]
-----Original Message-----
Sent: Thursday, May 09, 2002 11:49 AM
To: Multiple recipients of list ORACLE-L
There is a vital piece of information missing, namely how long
was the accumulated wait time for each wait, and over what
period of time?
Jared
"Seema Singh" <[EMAIL PROTECTED]>
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05/09/2002 11:18 AM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
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Subject: WAITS
Hi
I checked wait in my database and found the following are top 5 waits.
Event Waits
single-task message 1,411,047
log file sync 326,222
SQL*Net more data to client 7,363,877
control file parallel write 27,674
latch free 107,486
Any suggestions from group.what to do?
Thx
-Seema
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