Performance monitoring of database tuning solutions

Performance troubleshooting methodology

A good workman does his work well , You must sharpen your tools first SQL Server

Windows System monitor
SQL Trace profiler
Dynamic management view & Dynamic management functions
Performance dashboard report
Activity monitor
SQL Server Agent alerts
Data engine optimization consultant
Query execution plan

Relational database performance Performance Studio

Resource governor

Be able to treat different workloads differently

For example, use the application name , Login name, etc .

Limit per request

Importance
Maximum memory percentage
Maximum CPU Time
Grant timeout value
Maximum number of requests

Resource monitoring

Performance examples ( Before tuning )

Server hardware resources
processor 2 individual , Memory 2 GB
share 1 + 14 Stored procedures , There are about 30000 A complex system of instructions , You need to perform 4 hr 21 min
User needs ： Must be on 2 hr Execution completed within

Performance examples ( After tuning )

Only one of the slowest queries , unnecessary table variable Inquiry skills , Change to query directly from the data table , And establish a non cluster index of composite fields for the data table fields required in the query
The running time is greatly reduced to 1 hr 15 min, Performance improvement 71%, The expectations of users' needs have been met
Follow up recommendations
Performance objects and counters ：
Processor: % Processor Time Keep at 70% following
Memory：page/sec exceed 7800
Memory：available Mbytes only 4MB
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