IBM Support

db2mon script for monitoring performance

Question & Answer


The db2mon script is a created on top of the SQL monitoring interfaces provided by Db2 LUW.
It monitors database activity for a set amount of time (default = 30 seconds) and provides various metrics in a detailed report section as the output.


Performance troubleshooting is a challenging topic. This script is widely used within support to troubleshoot performance problems, it is generic in nature and works well with any offering of Db2 (including PureScale)

Instead of traditional snapshot monitoring, this tool uses the in-memory metrics interfaces available for obtaining various performance details about the database.


Version and higher provide the most recent version of the script in the ~/sqllib/samples/perf directory in the instance home directory.
The script can be copied from there. The copy in the samples directory is the most appropriate version of the script to use.
In older releases, you can still use the versions attached to this web page.
These copies are provided here for convenience with the default 30 second runtime and were generated with version  v1.2.0 of


A regular execution would be to run:

./ <db> >> report.out

To interpret the data, look for "REPORT STARTS HERE" in the output file.

If the data needs to be retained for further analysis in a table format, then use the
"db2 -tvf db2mon_export.sql" script instead.
This command produces ".ixf" files that can be imported with the db2mon_import.sql file and a report can be generated using db2mon_report.sql.

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Document Information

Modified date:
25 April 2022