SQL Server - ways to identify the worst performing
queries - Feb 27, 2010 at 11:50 AM by Shuchi Gauri
What are the ways to identify the worst performing queries in my SQL Server
database application?
SQL Server Profiler can help in identifying worst performing queries. Create a
new trace using the following steps:
-
Select SQL:BatchCompleted event class.
-
Select Groups->duration
-
Select EventClass, TextData, CPU, Application Name, LoginName, NTUserName, SPID
as columns.
-
Select Application Name, DatabaseName, Duration as filters.
This trace will provide a result of queries sorted as per execution time in
increasing order.
SQL Server - ways to identify the worst performing
queries - May 05, 2009 at 22:00 PM by Rajmeet Ghai
What are the ways to identify the worst performing queries in my SQL Server
database application?
Worst performing queries in my SQL Server database application can be
identified using Dynamic Management views and Dynamic Management Functions. It
helps to find the internal working of SQL instances and database objects.
sys.dm_exec_query_stats, sys.dm_exec_cached_plans, sys.dm_exec_sql_text, and
sys.dm_exec_plan_attributes are the different types that return the statistics
for T-SQL statements executed on the instance. These types are used using
simple select statements. The output shows statitcis of the SQL staments in
terms of total CPU that a given T-SQL statement has consumed for all
executions, total number of physical read, logical writes, total amount of
elapsed time etc.
SQL Server - ways to identify the worst performing
queries - June 21, 2009 at 09:00 AM by Amit Satpute
The SQL Server Profiler makes the task of identifying the worst performing
queries easier.
The following configurations need to be used to create a trace:
Event Classes:
1. SQL:BatchCompleted
Data Columns:
1. Groups
Duration
2. Columns
EventClass
TextData
CPU
Application Name
LoginName
NTUserName
SPID
Filters:
1. Application Name
2. DatabaseName
3. Duration
The duration of each query execution is sorted in ascending order of
duration.
The longest running queries are at the bottom due to which they can be easily
identified.
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