В данном докладе мы рассмотрим основные причины, который понижают производительность нашей базы данных. Поговорим о возможных путях решения подобных проблем, а так же рассмотрим инструменты предусмотренные в SQL Server для слежения за производительностью.

1. SQL Server
performance issues
and the best ways to
solve them
rkerimhanov@codemastersintl.com

2. Contents
 Hardware Resource Bottlenecks
 Query Design Recommendations
 SQL Query Performance Analysis

3. A Fixed Unit of Time Spent

4. Hardware Resource Bottlenecks
 Memory
 Disk I/O
 Processor
 Network

5. Memory Bottleneck Resolutions
 Optimizing application workload
 Allocating more memory to SQL Server
 Increasing system memory
 Changing from a 32-bit to a 64-bit
processor
 Enabling 3GB of process space

6. Disk Bottleneck Resolutions
 Optimizing application workload
 Using a faster disk drive
 Adding system memory
 Creating multiple files and filegroups
 Saving Log Files to a Separate Physical
Disk
 Partitioning Tables

7. Processor Bottleneck Resolutions
 Optimizing application workload
 Using more or faster processors
 Not running unnecessary software

8. Network Bottleneck Resolutions
 Optimizing application workload
 Moderating and avoiding interruptions

9. Query Design Recommendations
 Operate on small result sets
 Use indexes effectively
 Avoid optimizer hints
 Use domain and referential integrity
 Avoid resource-intensive queries
 Reduce the number of network round-trips
 Reduce the transaction cost
 Reduce using of cursors

10. SQL Query Performance Analysis
 SQL Profiler
 Performance Monitor
 Database Engine Tuning Advisor

11. Resources
 SQL Server 2008 Query Performance Tuning Distilled
 http://msdn.microsoft.com/ru-ru/library/ms123401.aspx
 http://www.sqlmag.com/content1/topic/top-10-performance-tips-for-sql-
server/catpath/sql-server/page/4
 http://www.codegain.com/articles/sqlservers/servermanagment/top-10-sql-
server-performance-tuning-tips.aspx
 http://www.idera.com/Downloads/WhitePapers/Top10SQLPerf.pdf
 http://www.codeproject.com/Articles/37089/Top-10-steps-to-optimize-data-
access-in-SQL-Server
 http://www.codeproject.com/Articles/34372/Top-10-steps-to-optimize-data-
access-in-SQL-Server
 http://searchsqlserver.techtarget.com/tip/T-SQL-performance-problems-
and-solutions#return
 http://www.dotnetheaven.com/UploadFile/skrishnasamy/SQLPerformanceT
unning03112005044423AM/SQLPerformanceTunning.aspx
 http://msdn.microsoft.com/en-us/library/ff647793.aspx#scalenetchapt14
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