There is insufficient memory available in the buffer pool

By Blogger
Recently one of the developers sent me following error:
Message: SQL Error [Microsoft OLE DB Provider for SQL Server: There is insufficient memory available in the buffer pool.
SQL State: 42000    Native Error: 802
State: 20     Severity: 17
SQL Server Message: There is insufficient memory available in the buffer pool.
I checked the memory usage by components under Memory Consumption server report. Following is the screenshot of the report:

I found that CACHESTORE_SQLCP was allocated most memory. This type of memory clerk indicates memory consumption by plans of SQL statements or batches not found in any stored procedures, triggers or functions. I just wanted to clear pool for CACHESTORE_SQLCP. The name for this memory clerk is "SQL Plans". Which I found by querying sys.dm_os_memory_clerks dynamic management view. I then executed the following command to clear the pool for CACHESTORE_SQLCP.

DBCC FREESYSTEMCACHE('SQL Plans')

The memory allocated to that clerk was reduced now as per the below screenshot:

This resolved the issue. User was then able to execute the same query with no issue.

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