Oracle-L: Batch process (PS - SQR) performance tuning

From: <Mohammed.Ahsanuddin_at_VerizonWireless.com>
Date: Thu, 20 Jun 2002 07:38:55 -0800
Message-ID: <F001.00482BC7.20020620073855@fatcity.com>

Hi All,

I would humbly request your opinion on the following batch tuning scenario.

Environment: Sun E10K, running Solaris 2.8 and ORacle 8173, 24 CPU, 24G RAM, Peoplesoft 817 HRMS
Program : GLINTERFACE (SQR)

I am in the process of tuning the above batch job, which is currently taking 7 hours..Upon analysis I found the following:

From the SQL_TRACE file..The total for all RECURSIVE and NON RECURSIVE is 108 minutes.
From statspack report the top 5 events are:

Top 5 Wait Events

~~~~~~~~~~~~~~~~~                                             Wait     %
Total
Event                                               Waits  Time (cs)   Wt

Time

-------------------------------------------- ------------ ------------
-------
SQL*Net message from client                    15,093,209   21,490,676
98.65
log file sequential read                          128,032      114,783


.53

db file sequential read                           113,210       53,619


.25

db file parallel write                             16,793       45,308


.21

log file parallel write                            55,036       28,197


.13

          ------------------------------------------------------------

3) I have also collected OS statistics for the duration of the process, but there are no CPU contention or memory issues (no paging/swapping).

4) By looking at the stats above, can it be deduced that out of 7 hours since only 108 minutes are being spent on the SQL execution and there are no OS related performance issues which indicate there may not be unaccounted oracle waits, the remaining (312 minutes) is spent in the program itself (i.e GLINTERFACE SQR) ?

Any insight and help on steps to take further will be very much appreciated..

Thanks

Mohammed Ahsanuddin
Oracle DBA

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Received on Thu Jun 20 2002 - 10:38:55 CDT