db.collection.getPlanCache()
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Definition
db.collection.getPlanCache()Important
mongosh Method
This page documents a
mongoshmethod. This is not the documentation for a language-specific driver, such as Node.js.For MongoDB API drivers, refer to the language-specific MongoDB driver documentation.
Returns an interface to access the query plan cache for a collection. The interface provides methods to view and clear the query plan cache.
Returns: Interface to access the query plan cache. The query optimizer only caches the plans for those query shapes that can have more than one viable plan.
Methods
The following methods are available through the interface:
Name | Description |
|---|---|
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(). | |
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() | |
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(). | |
Returns the plan cache information for a collection. Accessible
through the plan cache object of a specific collection, i.e.
New in version 4.4. |