SQL Script for Memory Stats

	SET NOCOUNT ON
	-- Get size of SQL Server Page in bytes
	DECLARE @pg_size INT, @Instancename varchar(50)
	SELECT @pg_size = low from master..spt_values where number = 1 and type = 'E'
	-- Extract perfmon counters to a temporary table
	IF OBJECT_ID('tempdb..#perfmon_counters') is not null DROP TABLE #perfmon_counters
	SELECT * INTO #perfmon_counters FROM sys.dm_os_performance_counters
	-- Get SQL Server instance name
	SELECT @Instancename = LEFT([object_name], (CHARINDEX(':',[object_name]))) FROM #perfmon_counters WHERE counter_name = 'Buffer cache hit ratio'
	-- Print Memory usage details
	PRINT '----------------------------------------------------------------------------------------------------'
	PRINT 'Memory usage details for SQL Server instance ' + @@SERVERNAME + ' (' + CAST(SERVERPROPERTY('productversion') AS VARCHAR) + ' - ' + SUBSTRING(@@VERSION, CHARINDEX('X',@@VERSION),4) + ' - ' + CAST(SERVERPROPERTY('edition') AS VARCHAR) + ')'
	PRINT '----------------------------------------------------------------------------------------------------'
	SELECT 'Memory visible to the Operating System'
	SELECT CEILING(physical_memory_kb/1048576.0) as [Physical Memory_GB], CEILING(virtual_memory_kb/1048576.0) as [Virtual Memory GB] FROM sys.dm_os_sys_info
	SELECT 'Total Memory used by SQL Server Buffer Pool as reported by Perfmon counters'
	SELECT cntr_value as Mem_KB, cntr_value/1024.0 as Mem_MB, (cntr_value/1048576.0) as Mem_GB FROM #perfmon_counters WHERE counter_name = 'Total Server Memory (KB)'
	SELECT 'Memory needed as per current Workload for SQL Server instance'
	SELECT cntr_value as Mem_KB, cntr_value/1024.0 as Mem_MB, (cntr_value/1048576.0) as Mem_GB FROM #perfmon_counters WHERE counter_name = 'Target Server Memory (KB)'
	SELECT 'Total amount of dynamic memory the server is using for maintaining connections'
	SELECT cntr_value as Mem_KB, cntr_value/1024.0 as Mem_MB, (cntr_value/1048576.0) as Mem_GB FROM #perfmon_counters WHERE counter_name = 'Connection Memory (KB)'
	SELECT 'Total amount of dynamic memory the server is using for locks'
	SELECT cntr_value as Mem_KB, cntr_value/1024.0 as Mem_MB, (cntr_value/1048576.0) as Mem_GB FROM #perfmon_counters WHERE counter_name = 'Lock Memory (KB)'
	SELECT 'Total amount of dynamic memory the server is using for the dynamic SQL cache'
	SELECT cntr_value as Mem_KB, cntr_value/1024.0 as Mem_MB, (cntr_value/1048576.0) as Mem_GB FROM #perfmon_counters WHERE counter_name = 'SQL Cache Memory (KB)'
	SELECT 'Total amount of dynamic memory the server is using for query optimization'
	SELECT cntr_value as Mem_KB, cntr_value/1024.0 as Mem_MB, (cntr_value/1048576.0) as Mem_GB FROM #perfmon_counters WHERE counter_name = 'Optimizer Memory (KB) '
	SELECT 'Total amount of dynamic memory used for hash, sort and create index operations.'
	SELECT cntr_value as Mem_KB, cntr_value/1024.0 as Mem_MB, (cntr_value/1048576.0) as Mem_GB FROM #perfmon_counters WHERE counter_name = 'Granted Workspace Memory (KB) '
	SELECT 'Total Amount of memory consumed by cursors'
	SELECT cntr_value as Mem_KB, cntr_value/1024.0 as Mem_MB, (cntr_value/1048576.0) as Mem_GB FROM #perfmon_counters WHERE counter_name = 'Cursor memory usage' and instance_name = '_Total'
	SELECT 'Number of pages in the buffer pool (includes database, free, and stolen).'
	SELECT cntr_value as [8KB_Pages], (cntr_value*@pg_size)/1024.0 as Pages_in_KB, (cntr_value*@pg_size)/1048576.0 as Pages_in_MB FROM #perfmon_counters WHERE object_name= @Instancename+'Buffer Manager' and counter_name = 'Total pages'
	SELECT 'Number of Data pages in the buffer pool'
	SELECT cntr_value as [8KB_Pages], (cntr_value*@pg_size)/1024.0 as Pages_in_KB, (cntr_value*@pg_size)/1048576.0 as Pages_in_MB FROM #perfmon_counters WHERE object_name=@Instancename+'Buffer Manager' and counter_name = 'Database pages'
	SELECT 'Number of Free pages in the buffer pool'
	SELECT cntr_value as [8KB_Pages], (cntr_value*@pg_size)/1024.0 as Pages_in_KB, (cntr_value*@pg_size)/1048576.0 as Pages_in_MB FROM #perfmon_counters WHERE object_name=@Instancename+'Buffer Manager' and counter_name = 'Free pages'
	SELECT 'Number of Reserved pages in the buffer pool'
	SELECT cntr_value as [8KB_Pages], (cntr_value*@pg_size)/1024.0 as Pages_in_KB, (cntr_value*@pg_size)/1048576.0 as Pages_in_MB FROM #perfmon_counters WHERE object_name=@Instancename+'Buffer Manager' and counter_name = 'Reserved pages'
	SELECT 'Number of Stolen pages in the buffer pool'
	SELECT cntr_value as [8KB_Pages], (cntr_value*@pg_size)/1024.0 as Pages_in_KB, (cntr_value*@pg_size)/1048576.0 as Pages_in_MB FROM #perfmon_counters WHERE object_name=@Instancename+'Buffer Manager' and counter_name = 'Stolen pages'
	SELECT 'Number of Plan Cache pages in the buffer pool'
	SELECT cntr_value as [8KB_Pages], (cntr_value*@pg_size)/1024.0 as Pages_in_KB, (cntr_value*@pg_size)/1048576.0 as Pages_in_MB FROM #perfmon_counters WHERE object_name=@Instancename+'Plan Cache' and counter_name = 'Cache Pages' and instance_name = '_Total'
	SELECT 'Page Life Expectancy - Number of seconds a page will stay in the buffer pool without references'
	SELECT cntr_value as [Page Life in seconds],CASE WHEN (cntr_value > 300) THEN 'PLE is Healthy' ELSE 'PLE is not Healthy' END as 'PLE Status' FROM #perfmon_counters WHERE object_name=@Instancename+'Buffer Manager' and counter_name = 'Page life expectancy'
	SELECT 'Number of requests per second that had to wait for a free page'
	SELECT cntr_value as [Free list stalls/sec] FROM #perfmon_counters WHERE object_name=@Instancename+'Buffer Manager' and counter_name = 'Free list stalls/sec'
	SELECT 'Number of pages flushed to disk/sec by a checkpoint or other operation that require all dirty pages to be flushed'
	SELECT cntr_value as [Checkpoint pages/sec] FROM #perfmon_counters WHERE object_name=@Instancename+'Buffer Manager' and counter_name = 'Checkpoint pages/sec'
	SELECT 'Number of buffers written per second by the buffer manager"s lazy writer'
	SELECT cntr_value as [Lazy writes/sec] FROM #perfmon_counters WHERE object_name=@Instancename+'Buffer Manager' and counter_name = 'Lazy writes/sec'
	SELECT 'Total number of processes waiting for a workspace memory grant'
	SELECT cntr_value as [Memory Grants Pending] FROM #perfmon_counters WHERE object_name=@Instancename+'Memory Manager' and counter_name = 'Memory Grants Pending'
	SELECT 'Total number of processes that have successfully acquired a workspace memory grant'
	SELECT cntr_value as [Memory Grants Outstanding] FROM #perfmon_counters WHERE object_name=@Instancename+'Memory Manager' and counter_name = 'Memory Grants Outstanding'

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