Help Center> Data Warehouse Service> Developer Guide> Data Import> Doing VACUUM to a Table
View PDF

Doing VACUUM to a Table

If a large number of rows were updated or deleted during import, run VACUUM FULL before ANALYZE. A large number of updates and delete operations generate huge disk page fragments, which reduces the query efficiency. VACUUM FULL can restore disk page fragments and return them to the OS.

  1. Run the VACUUM FULL statement.

    Do VACUUM FULL to the product_info table: 
    1
    		 
    VACUUM FULL product_info

    VACUUM

Parent topic: Data Import