Chat now with support
Chat with Support

Spotlight on DB2 6.9.3 - User Guide

Spotlight on IBM DB2 LUW (Linux, Unix, and Windows)
New in This Release Getting started with Spotlight on IBM DB2 LUW Desktop features specific to Spotlight on IBM DB2 LUW Spotlight on IBM DB2 LUW drilldowns
About Spotlight on IBM DB2 LUW drilldowns Buffer Pool Analysis drilldown Client Application Analysis drilldown Database Analysis drilldown Database Manager Summary drilldown Diagnostic Log drilldown FCM Analysis drilldown Tablespace Analysis drilldown Top SQL drilldown Operating System drilldown Workload Management Analysis drilldown
Spotlight on IBM DB2 LUW alarms Spotlight on IBM DB2 LUW Options Tuning SQL statements in Spotlight on IBM DB2 LUW
Spotlight Basics
Spotlight Connections Monitor Spotlight Connections Alarms Charts, Grids And Home Page Components View | Options Troubleshooting
Spotlight History Spotlight on Windows
Connect to Windows Systems Background Information Home Page Alarms Drilldowns View | Options Troubleshooting
Spotlight on Unix About us Third-party contributions Copyright

Threshold Cleans component

The Thresh Cleans component displays the percentage of page cleaners invoked because a buffer pool has reached the dirty page threshold limit for the database.

Required monitor switch

Buffer Pool

Displayed statistic

At each refresh, Spotlight captures the percentage of page cleans due to a buffer pool reaching the dirty page threshold. This threshold is set by the CHNGPGS_THRESH database configuration parameter. The CHNGPGS_THRESH parameter is defined as a percentage of the size of the buffer pool. When the number of dirty pages in the buffer pool reaches this parameter percentage, the page cleaners are triggered. If you set this percentage too low, pages might be written out too early, requiring them to be read back in. If this percentage is too high, too many dirty pages accumulate in the buffer, requiring users to write out pages synchronously.

Associated drilldown

Click the Thresh Cleans component to open the Databases drilldown. This drilldown provides details about database or partition that you are monitoring. The Statistics tab on the drilldown is in immediate focus so you can examine page cleaner statistics in the database.


Related topics

Related Documents

The document was helpful.

Select Rating

I easily found the information I needed.

Select Rating