sys.sp_xtp_checkpoint_force_garbage_collection (Transact-SQL)

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2014)noAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Marks source files used in the merge operation with the log sequence number (LSN) after which they are not needed and can be garbage collected. Also, it moves the files whose associated LSN is lower than the log truncation point to filestream garbage collection.

Topic link icon Transact-SQL Syntax Conventions


sys.sp_xtp_checkpoint_force_garbage_collection [[ @dbname=database_name]  


The database to run garbage collection on. The default is the current database.

Return Code Values

0 for success. Nonzero for failure.

Result Set

A returned row contains the following information:

Column Description
num_collected_items Indicates the number of files that have been moved to filestream garbage collection. These are the files whose log sequence number (LSN) is less than the LSN of log truncation point
num_marked_for_collection_items Indicates the number of data/delta files whose LSN has been updated with the log blockID of the end-of-log LSN.
last_collected_xact_seqno Returns the last corresponding LSN up to which the files have been moved to filestream garbage collection.


Requires database owner permission.


exec [sys].[sp_xtp_checkpoint_force_garbage_collection] hkdb1  

See Also

System Stored Procedures (Transact-SQL)
In-Memory OLTP (In-Memory Optimization)