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OCP Instructors Guide for Oracle DBA Certification

Chapter 8 - Miscellaneous Oracle Information

Monitor By Day So You Don’t Get Called at Night

The following information from the Oracle V$ performance tables and data dictionary tables provides a good foundation for daily proactive monitoring:

  • Datafile freespace.

  • Segments having extent sizes that are greater than 20.

  • Segments that are 20 extents from reaching their maxextent size.

  • Disk free space. A neat trick is to run SQL*Plus on the database server to create the reports and use the HOST command to issue the operating system command that returns disk space information. This will include the disk space information in the SQL*Plus output.

  • Views and stored procedures that have a status of ‘INVALID’ in dba_objects.

  • Data buffer hit ratios.

  • Shared pool reload statistics.

  • Log buffer flushes.

  • Datafile I/O.

  • Sorts to memory vs. sorts to disk.

  • Rollback/Undo performance indicators.

  • High resource consuming SQL statements.

Once you find the scripts that collect the aforementioned information, review them to see if they satisfy your needs, test and then implement them.

The above text is an excerpt from:

OCP Instructors Guide for Oracle DBA Certification
A Study Guide to Advanced Oracle Certified Professional Database
Administration Techniques

ISBN 0-9744355-3-8

by Christopher T. Foot

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