Database Performance Queries and Tips

Wed, 26 Aug 2026 11:57:06 -0500

This is a working document.

Microsoft SQL Server

Sites I Find Helpful

Brent Ozar Unlimited

Performance

Reports / Queries

This is a variation on the built in report “Top Queries by Total I/O” which includes physical / logical reads in GB.

Mostly stashing here for my own benefit.

SELECT TOP 20
    DB_NAME(st.dbid) AS database_name,
    qs.creation_time,
	qs.last_execution_time,
    qs.execution_count,
	qs.total_physical_reads * 8 / 1024.0 / 1024.0 AS physical_reads_gb,
	qs.total_logical_reads * 8 / 1024.0 / 1024.0 AS logical_reads_gb,
    qs.total_logical_writes * 8 / 1024.0 / 1024.0 AS logical_writes_gb,
    qs.total_worker_time,
    st.text AS full_query_text,
    qp.query_plan
FROM sys.dm_exec_query_stats qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st
CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp
ORDER BY physical_reads_gb DESC;

Sql on The Ginger Sysadmin Blog

Database Performance Queries and Tips

Microsoft SQL Server

Sites I Find Helpful

Performance

Reports / Queries