Vacuum

Clean up files associated with a table. There are different versions of this command for Delta and Apache Spark tables.

Vacuum a Delta table (Delta Lake on Databricks)

VACUUM [ [db_name.]table_name | path] [RETAIN num HOURS] [DRY RUN]

Recursively vacuum directories associated with the Delta table and remove data files that are no longer in the latest state of the transaction log for the table and are older than a retention threshold. Files are deleted according to the time they have been logically removed from Delta’s transaction log + retention hours, not their modification timestamps on the storage system.

The default threshold is 7 days. Databricks does not automatically trigger VACUUM operations on Delta tables. See Remove files no longer referenced by a Delta table.

If you run VACUUM on a Delta table, you lose the ability time travel back to a version older than the specified data retention period.

RETAIN num HOURS

The retention threshold.

DRY RUN

Return a list of files to be deleted.

Vacuum a Spark table

VACUUM [ [db_name.]table_name | path] [RETAIN num HOURS]

RETAIN num HOURS

The retention threshold.

Recursively vacuum directories associated with the Spark table and remove uncommitted files older than a retention threshold. The default threshold is 7 days. Databricks automatically triggers VACUUM operations as data is written. See Clean up uncommitted files.