Server Jvm Option
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IBM GigaBit Server Adapter SX LC Option 5700 $65.5 IBM GigaBit Server Adapter SX LC Option 5700 |
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IBM Option 5719 LR Long Range Server Adapter 80P5758 $297.33 IBM Option 5719 LR Long Range Server Adapter 80P5758 |
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IBM Option 5719 LR Long Range Server Adapter 91235722 $297.33 IBM Option 5719 LR Long Range Server Adapter 91235722 |
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IBM Option 5719 LR Long Range Server Adapter 5719 $297.33 IBM Option 5719 LR Long Range Server Adapter 5719 |
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IBM Option 5718 SR Short Range 10Gbps Server Adapter 91235721 $238.83 IBM Option 5718 SR Short Range 10Gbps Server Adapter 91235721 |
Evaluating Performance With SQL Server Monitoring Counters
SQL Server counters are tools used in SQL Server monitoring. They allow you to measure the various factors of SQL server performance. If you collect historical data you can use it now and in the future to properly optimize your SQL server. These counters can be utilized for specific metrics of your choice. Counters aid DBAs in identifying and solving SQL server performance issues.
Discover more SQL Server monitoring tactics.
Here are 5 common SQL server counters you could use while optimizing your SQL server.
1. Buffer Manager: Page Life Expectancy
A counter of page life expectancy will measure the amount of time a page stays in the buffer cache. The time is measured in seconds. If a page remains in memory it does not require SQL server queries to read from a disk. System performance increases with longer page life expectancy.
2. Batch Requests/Second
Batch requests/second is the measurement of how many batches an SQL server can receive in one second. It indicates how much activity SQL Server is processing. Higher numbers mean a higher number of query executions. Optimization of a SQL server requires you to take these measurements often to discover the SQL server performance over a period of time.
3. SQL Compilations/Second
SQL compilations/second measures the number of times SQL Server compiles an execution plan per second. This resource intensive process can negatively impact your SQL performance. Comparing this measurement against batch requests/second allows you to identify whether or not compilations are hindering performance.
4. Buffer Cache Hit Ratio
The buffer cache hit ratio measures how often SQL Server finds data pages in its buffer cache when a query requests one. Performance improves as the number reaches closer to 100. Essentially it means that a SQL server was able to grab necessary data from memory and not from a disk.
Learn about the benefits of SQL Server optimization.
5. Lock Waits/Second
Occasionally, SQL Server must lock system resources in order to manage large numbers of concurrent users. Lock waits/seconds is a measurement that counts how many times a SQL server couldn't retain a lock. SQL server performance can be degraded by the inability to retain a lock. The ideal SQL monitoring target is zero, and performance will suffer as the numbers get higher.