RE: STATSPACK interpretation

From: Joze Senegacnik <JozeS_at_hermes-plus.si>
Date: Tue, 23 Dec 2003 12:09:25 -0800
Message-ID: <F001.005DAE9A.20031223120925@fatcity.com>

STATSPACK interpretation

Using dbms_application_info package also causes that there are several versions of same statement - but they share same execution plan. You can check if this is the case by querying v$sqlarea (module and action columns).

Regards,

Joze

-----Original Message-----
From: Thomas Jeff [mailto:jeff.thomas@thomson.net]
Sent: Monday, December 22, 2003 9:39 PM
To: Multiple recipients of list ORACLE-L
Subject: STATSPACK interpretation

We recently experienced a crash on our prod datewarehouse running 9.2.0.2 on
AIX 4.3.3.    The cause of the crash was 4031 errors generated by background
processes (Oracle support has confirmed there is a bug involved), however,
since that crash occurred, a certain nightly batch job has slowed to a crawl.

Trying to recreate what has happened, I came across this in the STATSPACK report.
The interval for this report is 30 minutes.

Is it telling me that I have 746 versions of this call eating up 400+ mb at
the time of the snapshot?   Why would that be?   The procedure in question
uses bind variables.

SQL ordered by Sharable Memory for DB: DSSP Instance: DSSP Snaps: 3309 -3310
-> End Sharable Memory Threshold:   1048576

Sharable Mem (b) Executions % Total Hash Value
---------------- ------------ ------- ------------
     483,580,268           57   411.8    539672786
Module: pmdtm@ip68001 (TNS V1-V3)
BEGIN    GENERATE_PRODUCT_KEYS (:1,:2,:3,:4) ;   END;

-------------------------------------------------------------
SQL ordered by Version Count for DB: DSSP Instance: DSSP Snaps: 3309 -3310
-> End Version Count Threshold:        20

Version
   Count Executions   Hash Value
-------- ------------ ------------
     746           57    539672786
Module: pmdtm@ip68001 (TNS V1-V3)
BEGIN    GENERATE_PRODUCT_KEYS (:1,:2,:3,:4) ;   END;



--------------------------------------------
Jeffery D Thomas
DBA
Thomson Information Services
Thomson, Inc.

Email: jeff.thomas@thomson.net

Indy DBA Master Documentation available at:
http://gkmqp.tce.com/tis_dba
--------------------------------------------

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-- 
Author: Joze Senegacnik
  INET: JozeS_at_hermes-plus.si

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Received on Tue Dec 23 2003 - 14:09:25 CST