Index: openacs-4/packages/acs-core-docs/www/xml/install-guide/maintenance.xml
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-core-docs/www/xml/install-guide/maintenance.xml,v
diff -u -N -r1.24 -r1.25
--- openacs-4/packages/acs-core-docs/www/xml/install-guide/maintenance.xml 13 Jan 2005 13:55:17 -0000 1.24
+++ openacs-4/packages/acs-core-docs/www/xml/install-guide/maintenance.xml 16 Feb 2005 00:18:52 -0000 1.25
@@ -838,52 +838,7 @@
-
-
-
- Creating an appropriate tuning and monitoring environment
-
- The first task is to create an appropriate environment for finding out
- what is going on inside Oracle. Oracle provides Statspack, a package to
- monitor and save the state of the v$ performance views. These reports
- help finding severe problems by exposing summary data about the Oracle
- wait interface, executed queries. You'll find the installation
- instructions in $ORACLE_HOME/rdbms/admin/spdoc.txt. Follow the
- instructions carefully and take periodic snapshots, this way you'll be
- able to look at historical performance data.
-
-
-
- Also turn on the timed_statistics in your init.ora file, so that
- Statspack reports (and all other Oracle reports) are timed, which makes
- them a lot more meaningful. The overhead of timing data is about 1% per
- Oracle Support information.
-
-
-
-
- To be able to get a overview of how Oracle executes a particular query,
- install "autotrace". I usually follow the instructions here http://asktom.oracle.com/~tkyte/article1/autotrace.html.
-
-
- Make sure, that the Oracle CBO works with adequate statistics
-
-
- The Oracle Cost Based optimizer is a piece of software that tries to find
- the "optimal" execution plan for a given SQL statement. For that it
- estimates the costs of running a SQL query in a particular way (by default
- up to 80.000 permutations are being tested in a Oracle 8i). To get an
- adequate cost estimate, the CBO needs to have adequate statistics. For
- that Oracle supplies the dbms_stats
- package.
-
-
-
-
-
- ($Id$)
+ ($Id$)