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Spotlight on DB2 6.10 - 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

External Storage

External storage represents the physical disk space utilized by DB2 in the form of DMS and SMS tablespaces. DMS and SMS tablespaces use this physical storage space in different ways. With SMS, space allocation occurs when there is a need for additional space, and is, by default, allocated one page at a time. SMS tablespaces are managed by the operating system. By contrast, DMS tablespaces differ from SMS tablespaces in that space is allocated when the tablespace is created and is managed internally by DB2.

Tip: In general, use SMS tablespaces for general purposes because they provide good, low cost performance. If top performance is an issue, then DMS tablespaces are your best choice.

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