Managing Snapshot : Modifying Snapshot Settings

最新推荐文章于 2021-04-14 22:11:28 发布

转载最新推荐文章于 2021-04-14 22:11:28 发布 · 135 阅读

本文介绍了如何使用DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS过程来调整数据库快照的保留时间、生成频率及TopSQL记录数量等参数的具体方法。

For example:
BEGIN
DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS( retention => 43200,
interval => 30, topnsql => 100, dbid => 3310949047);
END;
/

setting affects how often in minutes that snapshots are automatically
generated. The RETENTION setting affects how long in minutes that snapshots are
stored in the workload repository. The TOPNSQL setting affects the number of Top SQL
to flush for each SQL criteria (Elapsed Time, CPU Time, Parse Calls, Shareable
Memory, and Version Count).

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