Database Manual / Reference / mongosh Methods / Query Plan Caches

PlanCache.help() (mongosh method方法)

Definition定义

PlanCache.help()

Displays the methods available to view and modify a collection's query plan cache.显示可用于查看和修改集合的查询计划缓存的方法。

The method is only available from the plan cache object of a specific collection; i.e.该方法仅在特定集合的计划缓存对象中可用；即。

db.collection.getPlanCache().help()

Compatibility兼容性

This method is available in deployments hosted in the following environments:此方法在以下环境中托管的部署中可用：

  • MongoDB Atlas: The fully managed service for MongoDB deployments in the cloud：云中MongoDB部署的完全托管服务
  • MongoDB Enterprise: The subscription-based, self-managed version of MongoDB：MongoDB的基于订阅的自我管理版本
  • MongoDB Community: The source-available, free-to-use, and self-managed version of MongoDB：MongoDB的源代码可用、免费使用和自我管理版本

Tip

db.collection.getPlanCache()