Query Plan Cache Methods
The PlanCache methods are only accessible from a collection's plan cache object. To retrieve the plan cache object, use the db.collection.getPlanCache() method.
Note
For details on a specific method, including syntax and examples, click on the link to the method's reference page.
| Name | Description |
|---|---|
db.collection.getPlanCache() | Returns an interface to access the query plan cache object and associated PlanCache methods for a collection. |
PlanCache.clear() | Clears all the cached query plans for a collection. Accessible through the plan cache object of a specific collection, i.e. db.collection.getPlanCache().clear(). |
PlanCache.clearPlansByQuery() | Clears the cached query plans for the specified query shape. Accessible through the plan cache object of a specific collection, i.e. db.collection.getPlanCache().clearPlansByQuery() |
PlanCache.help() | Displays the methods available for a collection's query plan cache. Accessible through the plan cache object of a specific collection, i.e. db.collection.getPlanCache().help(). |
PlanCache.list() | Returns the plan cache information for a collection. Accessible through the plan cache object of a specific collection, i.e. db.collection.getPlanCache().list().
New in version 4.4.
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