db.collection.getPlanCache()
On this page
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 plan for a plan cache query shape that can have more than one viable plan.
Query Settings
Starting in MongoDB 8.0, use query settings instead of adding index filters. Index filters are deprecated starting in MongoDB 8.0.
Query settings have more functionality than index filters. Also, index
filters aren't persistent and you cannot easily create index filters for
all cluster nodes. To add query settings and explore examples, see
setQuerySettings.
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 plan cache 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.
db.collection.getPlanCache().list(). |