SQL Server is running slow

1. Check number of connections(SP_Who2)

2. Check the processor usage not above 80% of utilization

3. Check the memory usage not above 40-45% of utilization

4. Check the Disk utilization using Perfmon

5. Use profiler to check for the users and current SQL activities and jobs running which might be a problem

6. Finally run UPDATE_STATISTICS command to update the indexes 

7. Need to check fragmentation and rebuild or reorg the indexes if it is required.  

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