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SQL Server 2008 – Profiling and Monitoring Tools

SQL Server 2008 – Profiling and Monitoring Tools . Learningcomputer.com. Reasons to Monitor . Troubleshoot problems, failed maintenance jobs and isolate bottlenecks Improve SQL Server performance and response time of your queries and reports Establish baseline performance for load testing

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SQL Server 2008 – Profiling and Monitoring Tools

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  1. SQL Server 2008 – Profiling and Monitoring Tools Learningcomputer.com

  2. Reasons to Monitor • Troubleshoot problems, failed maintenance jobs and isolate bottlenecks • Improve SQL Server performance and response time of your queries and reports • Establish baseline performance for load testing • Proactively look for problem areas if you are the DBA or responsible for the server

  3. Monitoring Tools in SQL Server • Windows • Task Manager • Event Viewer • Performance Monitor • SQL Server • Canned reports (server or database) • Activity Monitor (SQL Server and Job) • Logs (SQL Server and SQL Server Agent) • TSQL And DMV (Dynamic Management Views) • SQL Server Profiler (Favorite)

  4. Windows Tools • Task Manager • Quickest way to find information on CPU and Memory • Performance tab gives a good visual of resources • Processes and Application tabs highlight all the running programs • Event Viewer • Can be found under Administrative Tools (Control Panel) • Application tab gives you information on SQL Server Errors • Security tab has information on Failure Audits • Demo

  5. Performance Monitor • Performance Monitor lets you get graphical information on system counters • You can get real time data or from log files • In Vista, Resource Overview gives you real time data on CPU, Disk, Network • Charts can be Line, Histogram or Report • You can add multiple physical counters to gather tons of information, some of these are specific to SQL Server • We will take a look at handful of important counters next

  6. Performance Counters – Continued • CPU • Processor:% Processor Time – Percent of CPU being utilized < 50% • MEMORY • Available MBytes - Memory available to new processes, More is better • Pages/sec - Tells you how many times Virtual memory is being accessed • DISK • % Disk Time – Similar to Processor Time > 90% is bad • Avg.Disk Queue Length – Shows # of I/O operations waiting >2 is bad • SQL Server • SQLServer:Access Methods - Full Scans / sec >1 or 2 is bad • SQL Server:Buffer Manager - Buffer cache hit ratio (Using cache) > 90 • SQL Server:Locks - Average Wait Time, should be low

  7. Canned Report • Server Level • Server Dashboard • Activity - All Sessions • Performance – Top queries by average CPU • Database Level • Disk usage by Top tables • All Transactions • Demo

  8. Activity Monitor • Where is it???? Took me a little bit to find this one • RMB on Server, select Activity Monitor • New look is broken down by Resource Area + Filtering • Overview section: Graphs and Charts on system resources • Processes Section: Information on SPIDs. If you right click, you can kill the process or launch Profiler directly • Resource Waits: Wait info on CPU, I/O, Memory • Data File I/O • Recent Expensive Queries – favorite section

  9. Error Logs(SQL Server and SS Agent) • General information on SQL Server activity • Both logs share the same GUI • You can filter by user, computer, date, source and message • One current and a number of Archive Logs • Archived every time the service is restarted • File Location for logs is • C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\Log\ • Demo

  10. TSQL And DMV’s • TSQL • Sp_who2 and Sp_lock • DBCC_INPUTBUFFER • DMV • DMV’s are dynamic management views return server state that can be used to monitor the health of a server instance • select * from sys.dm_os_sys_info has system level info • select * from sys.dm_os_performance_counters will let you get information on the performance counters • More information can be found at http://msdn.microsoft.com/en-us/library/ms176083.aspx • Demo

  11. Profiler • SQL Server Profiler is a graphical user interface to SQL Trace for monitoring an instance of the Database Engine • You can capture and save data about each event to a file or table to analyze later • You can add Events class which is a type of event that can be traced e.g. Showplan XML • You can add a data column which is an attribute of an event classes captured in the trace e.g. Duration in milliseconds • Save the trace to a file or table • You can use Out of the box templates or customize them

  12. Profiler – Continued • Demo Scenario • I have created a user template called Kash_template that I will use for the demo • We are looking for slow queries (duration > 100) in AdventureWorks2008 database • I have setup two sessions to mimic activity: • One inserts data into SALES.CUSTOMER_ALL table and then updates it using a loop • The other one just browses data from SALES.CUSTOMER_ALL table using a loop • Both use the WAITFOR delay option

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