CLUSTER_DATABASE_INSTANCES 参数的真正含义

最新推荐文章于 2021-07-14 13:33:25 发布

转载最新推荐文章于 2021-07-14 13:33:25 发布 · 327 阅读

本文介绍了 Oracle Real Application Clusters (RAC) 中 CLUSTER_DATABASE_INSTANCES 参数的设置方法及其重要性。该参数用于指定集群数据库中配置的实例数量，并强调所有实例必须设置相同的值。合适的参数值有助于优化内存使用。

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CLUSTER_DATABASE_INSTANCES

Property Description Parameter type Integer Default value 1 Modifiable No Range of values Any nonzero value Basic No Real Application Clusters Multiple instances must have the same value.

CLUSTER_DATABASE_INSTANCES is a Real Application Clusters parameter that specifies the number of instances that are configured as part of your cluster database. You must set this parameter for every instance. Normally you should set this parameter to the number of instances in your Real Application Clusters environment. A proper setting for this parameter can improve memory use.

Oracle uses the value of this parameter to compute the default value of the LARGE_POOL_SIZE parameter when the PARALLEL_AUTOMATIC_TUNING parameter is set to true. Note that the PARALLEL_AUTOMATIC_TUNIG parameter has been deprecated.

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