DBCC UPDATEUSAGE is a command available in SQL Server that is used to update the page and row count metadata for database objects.
SQL SERVER – Manage Database Size with DBCC SHRINKDATABASE and WAIT_AT_LOW_PRIORITY
In this blog post, we will explore the DBCC SHRINKDATABASE command and its options, focusing on the WAIT_AT_LOW_PRIORITY feature.
Checking Constraints After a Bulk Load With DBCC CHECKCONSTRAINTS
Run DBCC CHECKCONSTRAINTS after a controlled bulk-load bypass, inspect violations, and restore enabled trusted CHECK and foreign-key rules.
Log File Not Shrinking: Read log_reuse_wait_desc First
A log file not shrinking is explained by one column: log_reuse_wait_desc. A demo database reads LOG_BACKUP and ACTIVE_TRANSACTION from it and shows why the first shrink after a log backup can still fail. A table lists the other reasons with the action for each.
Flush Authentication Cache: Who Can Run DBCC FLUSHAUTHCACHE
Flush authentication cache entries with DBCC FLUSHAUTHCACHE. This post tests the command on SQL Server 2025, shows who can run it and that on SQL Server 2025 it ends no open session, and says what it is documented to do on Azure SQL Database.
Checking Last Good DBCC CHECKDB Time With LastGoodCheckDbTime
Inspect LastGoodCheckDbTime for each database, flag stale or unavailable checks, and compare metadata with retained integrity-job evidence.
Reclaim Space After Dropping a Column With DBCC CLEANTABLE
To reclaim space after dropping a column, run DBCC CLEANTABLE or rebuild the index. This post measures both on a demo table and shows that CLEANTABLE shrinks the rows while only a rebuild returns the pages.