BI SQL # 182 : SQL Server DBA Scripts : Page Life Expectancy
Hi Folks,
In this article we are going to cover Page Life Expectancy.
In this post we are going to discuss following points:
- Problem Statement of SQL Script:
- Description of SQL Script:
- SQL Script Output Column
- SQL Script Code
- SQL Script Output Screenshot
- User Level to execute
Problem Statement of SQL Script:
Get page life expectancy.
Description of SQL Script:
This Transact-SQL script lists page life expectancy.
SQL Script Output Column
SQL Script Code
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED SELECT ple.[Node] ,LTRIM(STR([PageLife_S] / 3600)) + ':' + REPLACE(STR( [PageLife_S] % 3600 / 60, 2), SPACE(1), '0') + ':' + REPLACE(STR([PageLife_S] % 60, 2), SPACE(1), '0') [PageLife] ,ple.[PageLife_S] ,dp.[DatabasePages] [BufferPool_Pages] ,CONVERT(DECIMAL(15, 3), dp.[DatabasePages] * 0.0078125) [BufferPool_MiB] ,CONVERT(DECIMAL(15, 3), dp.[DatabasePages] * 0.0078125 / [PageLife_S]) [BufferPool_MiB_S] FROM ( SELECT [instance_name] [node] ,[cntr_value] [PageLife_S] FROM sys.dm_os_performance_counters WHERE [counter_name] = 'Page life expectancy' ) ple INNER JOIN ( SELECT [instance_name] [node] ,[cntr_value] [DatabasePages] FROM sys.dm_os_performance_counters WHERE [counter_name] = 'Database pages' ) dp ON ple.[node] = dp.[node]
SQL Script Output Screenshot
User Level to execute
- 300
Hope you will like to Page Life Expectancy.
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