立即与支持人员聊天
与支持团队交流

Spotlight on SAP ASE 2.11 - User Guide

Spotlight on SAP ASE
Background Information Desktop Features Connect to SAP ASE Spotlight® on SAP ASE Drilldowns Spotlight® on SAP ASE Alarms Glossary
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

Open Indexes Utilization chart

Use this chart to track the utilization of the Adaptive Server metadata cache for open indexes.

The number of active indexes, the number of free indexes, and the maximum number of indexes used are charted.

When Adaptive Server accesses an index, it has to access information about it in the respective system table: sysindexes. The metadata cache for indexes lets Adaptive Server access that information that describes it in the sysindexes row directly in its in-memory structure. This improves performance because it allows the Adaptive Server to bypass expensive calls that require disk access. It also reduces synchronization and spinlock contention when Adaptive Server has to retrieve index information at runtime.

Managing individual metadata caches for databases, indexes, or objects is beneficial for a database that contains a large number of indexes and objects, and where there is high concurrency among users. For more information about configuring the number of metadata caches, see "number of open databases," "number of open indexes," and "number of open objects."

  

相关文档

The document was helpful.

选择评级

I easily found the information I needed.

选择评级