Simple way to measure consumed resources

This SQL*Plus script offers a way to measure consumed resources in V$tables.

Statistics held in V$tables help to reveal the load of certain SQL statements on the DBMS. However, the statistical...

values given are absolute, so a comparison is needed to know the load of your portion of SQL code. Here you'll find SQL*Plus code to facilitate such a measurement easily and quickly. It was tested on versions 9.0 and 9.2, but it uses features existing in versions 8 and 7, too.

To know the amount of bytes of redo records generated by your SQL, you may use the following:

VARIABLE absolute NUMBER
VARIABLE delta NUMBER

BEGIN :absolute:= 0; END;
/

BEGIN
   SELECT m.value, m.value - :absolute INTO :absolute, :delta
   FROM v$mystat m, v$statname n
   WHERE m.statistic# = n.statistic# AND n.name = 'redo size';
END;
/

SAVE delta REPLACE

HOST echo PRINT delta >> delta.sql

UPDATE emp SET sal = sal;

@delta

The last two lines will be a template for the following measurements:

YOUR SQL CODE

@delta

YOUR SQL CODE

@delta

... and so on.

Change 'redo size'

This was last published in November 2004

Dig Deeper on Oracle and SQL

PRO+

Content

Find more PRO+ content and other member only offers, here.

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

SearchDataManagement

SearchBusinessAnalytics

SearchSAP

SearchSQLServer

TheServerSide

SearchDataCenter

SearchContentManagement

SearchFinancialApplications

Close