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SQL Performance Tuning

I was wondering if anyone has any ideas for performance tuning/optimization for both SQL 2005 and 2008.  Right now we are using the default configurations, but are running into some bottlenecks.

Looking for appropriate Paging File algorithms
Performance Optimation
Performance Monitoring
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mnevoso
Asked:
mnevoso
1 Solution
 
Brendt HessSenior DBACommented:
The top suggestions for optimizing, the ones that normally gains the most performance (usually by orders of magnitude) compared to other possibilities, are:

Add Indexes
Add usable memory
Use RAID-10 disks
Split TempDB, Log, and Data files to separate physical disk sets.
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kenwagersCommented:
Add maintenance plans that are run on a regular schedule.  The two plans I recommend are Otimizations and Integrity checks through the Database Maintenance Plans.  I usually schedule these to run weekly.  Backups should be run first.  SQL Agent needs to be running to allow the jobs to be scheduled.

The database should be backed up regularly, and the transaction logs truncated.  If the transaction logs have gotten very large, you may need to shrink them.   I typically run full backups daily, and hourly transaction backup logs for systems that have normal business hours availability.

For testing performance, I suggest running SQL Profiler, looking for queries that have high reads or writes, or have high CPU.  You can set filters when running SQL Profiler so you only see the high cost transactions.

If you seem to be having many locks, check the "Current Activity" section of the Enterprise manager - locks & blocks will be displayed there.

Other improvements can be to add memory available to SQL Server, increase the processors available to SQL Server (that may not be easy)
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