SQL Server DBCC FREEPROCCACHE: Clear the Plan Cache Safely
A stored procedure that returned in 20 milliseconds yesterday is timing out today, and nothing in the code changed. The data did not grow meaningfully, the indexes are intact, and statistics look current — yet the query is suddenly scanning a million rows it used to seek. The usual culprit is a cached execution plan …
Read MoreDBCC DBREINDEX vs ALTER INDEX REBUILD in SQL Server
Open the SQL Agent job history on an instance that has been running for a decade and you will still find DBCC DBREINDEX in a nightly maintenance step, quietly doing its job. It works — which is exactly why nobody has touched it. But it has been deprecated for the better part of twenty years, it locks tables it does not …
Read MoreSQL Server Wait Statistics Report: dm_os_wait_stats
Feb 27, 2026 / · 6 min read · sql server wait statistics performance dm os wait stats wait types bottleneck analysis dba scripts performance tuning sys.dm_os_wait_stats sys.dm_os_waiting_tasks ·Wait statistics are one of the most reliable ways to identify performance bottlenecks in SQL Server. This T-SQL script queries sys.dm_os_wait_stats, filters out background and idle wait types that do not indicate real problems, and ranks the remaining waits by their percentage of total wait time. Purpose and Overview …
Read MoreSQL Server: Find Tables with Clustered Indexes for Rebuild
SQL Server Query to Identify Tables with Clustered Indexes for Rebuilding Database administrators frequently need to perform maintenance operations on clustered indexes to optimize database performance. This SQL Server query provides a quick and efficient way to identify all user tables that contain clustered indexes, …
Read MoreSQL Server UPDATE STATISTICS and SELECT Dynamic Scripts
Aug 6, 2025 / · 4 min read · sql server database administration t-sql performance tuning dynamic sql database maintenance statistics automation sysobjects update statistics sys.tables ·SQL Server Dynamic Update Statistics and Select Scripts for Database Maintenance Purpose These SQL Server scripts are designed to automatically generate database maintenance commands by dynamically creating UPDATE STATISTICS statements and SELECT queries for all user tables in a database. This approach is particularly …
Read MoreSQL Server DBCC DBREINDEX with Timing: Index Maintenance
Aug 5, 2025 / · 4 min read · sql server database maintenance performance tuning dbcc commands index optimization dba scripts database administration sql scripts DBCC DBREINDEX sysobjects ·SQL Server DBCC DBREINDEX Script with Timing - Database Maintenance Guide Database maintenance is a critical aspect of SQL Server administration, and index rebuilding plays a vital role in maintaining optimal database performance. This comprehensive guide explores powerful DBCC DBREINDEX scripts that include timing …
Read MoreDBCC DBREINDEX: SQL Server Index Rebuild Script
Aug 4, 2025 / · 4 min read · sql server database maintenance indexing performance tuning automation dbcc commands database administration optimization DBCC DBREINDEX sysobjects ·SQL Server DBCC DBREINDEX Script Generator for Database Maintenance Database maintenance is crucial for optimal SQL Server performance, and one of the most important tasks is maintaining database indexes. The DBCC DBREINDEX command is a powerful tool for rebuilding indexes, but manually running it on every table can be …
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