Spotlight on SAP ASE 2.12 - User Guide

Open Objects Utilization chart

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

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

When Adaptive Server accesses an object, it needs to read information about it in the corresponding system table: sysobjects. The metadata cache for objects lets Adaptive Server access that information that describes it in the sysobjects row directly in its in-memory structure. This improves performance because Adaptive Server bypasses expensive calls that require disk access. It also reduces synchronization and spinlock contention when Adaptive Server has to retrieve object 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."