SQL Server Performance Audit and Tuning Jason Pack

SQL Server Performance Audit and Tuning Jason Pack

Overview Using Performance Monitor Hardware and Operating System Performance SQL Server Configuration Settings Database Configuration Settings Index Performance Tuning Application Tuning SQL Profiler on Queries

Performance Monitor

Performance Monitor (2) Typical counters to monitor: Pages per second (memory) Want to average less than 20 Available bytes (memory) Should be over 5MB (on dedicated machine) Percent disk time (physical disk) Over 55% for 10 minutes indicates a bottleneck Percent processor time Over 80% for 10 minutes indicates a bottleneck

Tuning Hardware and Operating System Performance More RAM Good Check disk fragmentation Separate operating system files and SQL Server data files Be sure OS has newest SP Server should be configured as stand-alone server Turn off unnecessary services

SQL Server Configuration Settings In general, no need to modify If you have to SP CONFIGURE, will show your settings SP CONFIGURE ['configuration name'], [configuration setting value] GO RECONFIGURE WITH OVERRIDE GO, to change the settings

Database Configuration Right-click the database in Enterprise Manager, select Properties, then Options

Database Configuration (2) For reporting databases, set to Readonly Database auto-grow Transaction log auto-grow Estimate well, auto-grow creates virtual files, increasing recovery time

Index Performance Tuning Run the Index Tuning Wizard Only available in Enterprise edition Start with busiest database, and largest tables Every table, in every database, should have a clustered index on the PK Allows the data to be stored, physically, in order

Application Tuning Most important aspect in improving performance Not always possible

Application Tuning (2) Use stored procedures whenever possible Include SET NOCOUNT ON in stored procedure Keep transactions as short as possible Choose OLE DB over ODBC, as it is generally faster Don’t return more data than you need

SQL Profiler Events Stored Procedures RPC:Completed TSQL SQL:BatchCompleted Filters Duration 5000 ms No system events Data Columns Duration (group by) Event Class Database Identifier TextData CPU Writes Reads SPID

SQL Profiler (2)

References SQL-Server-Performance.Com, Brad McGehee, February 2005 Microsoft MSDN, Meier, J. D., Vasireddy, S., Babbar, A., et al., May 2004 http://msdn.microsoft.com/library/default.asp?url /library/en-us/dnpag/html/ scalenetchapt14.asp SQL-Server-Performance.Com, Geert Vanhove, June 2005 http://www.sql-server-performance.com/sql server performance audit10.asp http://www.sql-server-performance.com/gv monitoring 8 steps.asp Microsoft MSDN http://msdn.microsoft.com/library/default.asp?url /library/en-us/createdb/ cm 8 des 05 2ri0.asp