SQL Server, Plan Cache Object
The Plan Cache object provides counters to monitor how SQL Server uses memory to store objects such as stored procedures, ad hoc and prepared Transact-SQL statements, and triggers. Multiple instances of the Plan Cache object can be monitored at the same time, with each instance representing a different type of plan to monitor.
This table describes are the SQLServer:Plan Cachecounters.
SQL Server Plan Cache counters |
Description |
|---|---|
Cache Hit Ratio |
Ratio between cache hits and lookups. |
Cache Object Counts |
Number of cache objects in the cache. |
Cache Pages |
Number of 8-kilobyte (KB) pages used by cache objects. |
Cache Objects in use |
Number of cache objects in use. |
Each counter in the object contains the following instances:
Plan Cache instance |
Description |
|---|---|
_Total |
Information for all types of cache instances. |
Sql Plans |
Query plans produced from an ad hoc Transact-SQL query, including auto-parameterized queries, or from Transact-SQL statements prepared using sp_prepare or sp_cursorprepare. SQL Server caches the plans for ad hoc Transact-SQL statements for later reuse if the identical Transact-SQL statement is later executed. User-parameterized queries (even if not explicitly prepared) are also monitored as Prepared SQL Plans. |
Object Plans |
Query plans generated by creating a stored procedure, function, or trigger. |
Bound Trees |
Normalized trees for views, rules, computed columns, and check constraints. |
Extended Stored Procedures |
Catalog information for extended stores procedures. |
Temporary Tables & Table Variables |
Cache information related to temporary tables and table variables. |
See Also
Reference
SQL Server, Buffer Manager Object