SQL Server 内存使用情况

Posted 2020-10-21 TuringChang

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? 查看设置的最大与最小内存：

1 exec sp_configure ‘max server memory (MB)‘  
2 exec sp_configure ‘min server memory (MB)‘

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? SqlServer目标内存、当前内存、数据库内存页数：

1 SELECT object_name,counter_name,cntr_value,cntr_value/1024/1024 AS [cntr_value(GB)]  
2 FROM sys.dm_os_performance_counters  
3 WHERE counter_name in(‘Target Server Memory (KB)‘,‘Total Server Memory (KB)‘,‘Database pages‘)

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? 查看设置的最大与最小内存：

1 SELECT * FROM sys.dm_os_sys_info  
2 SELECT * FROM sys.dm_os_sys_memory  
3 SELECT * FROM sys.dm_os_process_memory

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? 查看当前是否有等待内存授予的进程：

1 Select a.*,b.text, c.query_plan   
2 from sys.dm_exec_query_memory_grants a  
3 CROSS APPLY sys.dm_exec_sql_text(sql_handle) b   
4 CROSS APPLY sys.dm_exec_query_plan (plan_handle) c

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? SqlServer预留和提交内存情况：

SELECT  [type]     
,SUM(virtual_memory_reserved_kb) AS [vm reserved]    
,SUM(virtual_memory_committed_kb) AS [vm commited]    
,SUM(awe_allocated_kb) AS [awe allocated]      
,SUM(shared_memory_reserved_kb) AS [sm reserved]    
,SUM(shared_memory_committed_kb) AS [sm committed]    
,SUM(single_pages_kb) AS [Stolen in Buffer Pool]    
,SUM(multi_pages_kb) AS [MemToLeave]    
,SUM(single_pages_kb) + SUM(multi_pages_kb) AS [Stolen]    
,SUM(virtual_memory_committed_kb) + SUM(multi_pages_kb) AS [Buffer Pool]    
FROM sys.dm_os_memory_clerks   
GROUP BY [type]    
ORDER BY [type] desc

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? 当前各数据库buffer pool的分配情况：

SELECT   
CASE database_id   
    WHEN 32767 THEN ‘ResourceDb‘   
    ELSE db_name(database_id) END AS Database_name  
,count(*) AS cached_pages_count  
,count(*)*8/1024 AS cached_space_in_mb  
,sum(convert(bigint,free_space_in_bytes))/1024/1024 AS free_space_in_mb  
FROM sys.dm_os_buffer_descriptors(nolock)  
GROUP BY db_name(database_id) ,database_id  
ORDER BY cached_pages_count DESC;

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? 当前数据库各表buffer pool的分配情况：

SELECT top(20) name ,index_id ,count(*)AS cached_pages_count   
,count(*)*8/1024 AS cached_space_in_mb   
FROM sys.dm_os_buffer_descriptors AS bd   
INNER JOIN (  
    SELECT object_name(object_id) AS name ,index_id ,allocation_unit_id  
    FROM sys.allocation_units AS au INNER JOIN sys.partitions AS p   
    ON au.container_id = p.hobt_id  AND (au.type = 1 OR au.type = 3 )   
    UNION ALL  
    SELECT object_name(object_id) AS name,index_id, allocation_unit_id  
    FROM sys.allocation_units AS au INNER JOIN sys.partitions AS p   
    ON au.container_id = p.hobt_id  AND au.type = 2  
) AS obj ON bd.allocation_unit_id = obj.allocation_unit_id  
WHERE database_id = db_id() AND obj.name NOT LIKE ‘sys%‘  
GROUP BY name, index_id   
ORDER BY cached_pages_count DESC

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? 当前各表或索引在缓冲池中的页数量及大小：

SELECT obj.name ,obj.index_id,i.name ,count(*)AS cached_pages_count ,count(*)*8/1024 AS cached_space_in_mb  
FROM sys.dm_os_buffer_descriptors AS bd   
INNER JOIN (  
    SELECT object_name(object_id) AS name,object_id,index_id ,allocation_unit_id  
    FROM sys.allocation_units AS au  
    INNER JOIN sys.partitions AS p ON au.container_id = p.hobt_id AND (au.type = 1 OR au.type = 3)  
    UNION ALL  
    SELECT object_name(object_id) AS name,object_id,index_id, allocation_unit_id  
    FROM sys.allocation_units AS au  
    INNER JOIN sys.partitions AS p   ON au.container_id = p.partition_id AND au.type = 2  
) AS obj ON bd.allocation_unit_id = obj.allocation_unit_id  
LEFT JOIN sys.indexes i(nolock) on obj.object_id = i.object_id AND obj.index_id = i.index_id    
WHERE database_id = db_id() AND obj.name NOT LIKE ‘sys%‘  
GROUP BY obj.name ,obj.index_id,i.name  
ORDER BY cached_pages_count DESC;

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? 统计当前内存分配情况：

select   
physical_memory_in_bytes / 1024 / 1024 as physical_memory_mb,  
virtual_memory_in_bytes / 1024 / 1024 as virtual_memory_mb,  
bpool_committed * 8 / 1024 as bpool_committed_mb,  
bpool_commit_target * 8 / 1024 as bpool_target_mb,  
bpool_visible * 8 / 1024 as bpool_visible_mb  
from sys.dm_os_sys_info

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? 当前内存脏页数量及大小：

SELECT db_name(database_id) AS ‘Database‘  
,count(page_id) AS ‘Dirty Pages‘  
,count(page_id)*8/1024 AS ‘Dirty Pages(MB)‘  
FROM sys.dm_os_buffer_descriptors(nolock)  
WHERE is_modified =1  
GROUP BY db_name(database_id)  
ORDER BY ‘Dirty Pages‘ DESC

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? 缓存类型数量大小：

select cacheobjtype as [Cached Type]  
,COUNT(*) [Number of Plans]   
,SUM(CONVERT(BIGINT,size_in_bytes))/1024/1024 [Plan Cache Size(MB)]  
from sys.dm_exec_cached_plans   
group by cacheobjtype   
order by [Plan Cache Size(MB)] desc

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? 缓存对象数量大小：

select objtype as [Cached Object Type]  
,COUNT(*) as [Number of Plans]   
,SUM(CONVERT(BIGINT,size_in_bytes))/1024/1024 [Plan Cache Size(MB)]  
,avg(usecounts) [Avg Use Count]   
from sys.dm_exec_cached_plans   
group by objtype   
order by [Plan Cache Size(MB)] desc

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? 内存对象：

SELECT top 10 * FROM sys.dm_os_memory_cache_counters(nolock)  
ORDER BY entries_count DESC;  
  
SELECT * FROM sys.dm_os_memory_clerks a  
WHERE name=‘TokenAndPermUserStore‘  
  
SELECT * FROM sys.dm_os_memory_cache_entries(nolock)  
WHERE [type]=‘USERSTORE_TOKENPERM‘ and name=‘TokenAndPermUserStore‘

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? 缓存分析对象：

SELECT * FROM sys.syscacheobjects   
SELECT * FROM sys.dm_exec_cached_plans

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? 即时查询优化（运行即生效）：

EXEC sp_configure ‘show advanced options‘,1  
RECONFIGURE  
EXEC sp_configure ‘optimize for ad hoc workloads‘,1  
RECONFIGURE

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all code ：

--查看设置的最大最小每次  
exec sp_configure ‘max server memory (MB)‘  
exec sp_configure ‘min server memory (MB)‘  
  
  
--SqlServer目标内存、当前内存 、数据库内存页数  
SELECT object_name,counter_name,cntr_value,cntr_value/1024/1024 AS [cntr_value(GB)]  
FROM sys.dm_os_performance_counters  
WHERE counter_name in(‘Target Server Memory (KB)‘,‘Total Server Memory (KB)‘,‘Database pages‘)  
  
  
--系统物理内存使用情况  
SELECT * FROM sys.dm_os_sys_info  
SELECT * FROM sys.dm_os_sys_memory  
SELECT * FROM sys.dm_os_process_memory  
  
--查看当前是否有等待内存授予的进程  
Select a.*,b.text, c.query_plan   
from sys.dm_exec_query_memory_grants a  
CROSS APPLY sys.dm_exec_sql_text(sql_handle) b   
CROSS APPLY sys.dm_exec_query_plan (plan_handle) c  
  
  
--SqlServer预留和提交内存情况  
DBCC MEMORYSTATUS; --旧的方法  
  
SELECT  [type]     
,SUM(virtual_memory_reserved_kb) AS [vm reserved]    
,SUM(virtual_memory_committed_kb) AS [vm commited]    
,SUM(awe_allocated_kb) AS [awe allocated]      
,SUM(shared_memory_reserved_kb) AS [sm reserved]    
,SUM(shared_memory_committed_kb) AS [sm committed]    
,SUM(single_pages_kb) AS [Stolen in Buffer Pool]    
,SUM(multi_pages_kb) AS [MemToLeave]    
,SUM(single_pages_kb) + SUM(multi_pages_kb) AS [Stolen]    
,SUM(virtual_memory_committed_kb) + SUM(multi_pages_kb) AS [Buffer Pool]    
FROM sys.dm_os_memory_clerks   
GROUP BY [type]    
ORDER BY [type] desc  
  
  
--当前各数据库buffer pool的分配情况  
SELECT   
CASE database_id   
    WHEN 32767 THEN ‘ResourceDb‘   
    ELSE db_name(database_id) END AS Database_name  
,count(*) AS cached_pages_count  
,count(*)*8/1024 AS cached_space_in_mb  
,sum(convert(bigint,free_space_in_bytes))/1024/1024 AS free_space_in_mb  
FROM sys.dm_os_buffer_descriptors(nolock)  
GROUP BY db_name(database_id) ,database_id  
ORDER BY cached_pages_count DESC;  
  
  
--当前数据库各表buffer pool的分配情况  
SELECT top(20) name ,index_id ,count(*)AS cached_pages_count   
,count(*)*8/1024 AS cached_space_in_mb   
FROM sys.dm_os_buffer_descriptors AS bd   
INNER JOIN (  
    SELECT object_name(object_id) AS name ,index_id ,allocation_unit_id  
    FROM sys.allocation_units AS au INNER JOIN sys.partitions AS p   
    ON au.container_id = p.hobt_id  AND (au.type = 1 OR au.type = 3 )   
    UNION ALL  
    SELECT object_name(object_id) AS name,index_id, allocation_unit_id  
    FROM sys.allocation_units AS au INNER JOIN sys.partitions AS p   
    ON au.container_id = p.hobt_id  AND au.type = 2  
) AS obj ON bd.allocation_unit_id = obj.allocation_unit_id  
WHERE database_id = db_id() AND obj.name NOT LIKE ‘sys%‘  
GROUP BY name, index_id   
ORDER BY cached_pages_count DESC  
  
  
-- 当前各表或索引在缓冲池中的页数量及大小  
SELECT obj.name ,obj.index_id,i.name ,count(*)AS cached_pages_count ,count(*)*8/1024 AS cached_space_in_mb  
FROM sys.dm_os_buffer_descriptors AS bd   
INNER JOIN (  
    SELECT object_name(object_id) AS name,object_id,index_id ,allocation_unit_id  
    FROM sys.allocation_units AS au  
    INNER JOIN sys.partitions AS p ON au.container_id = p.hobt_id AND (au.type = 1 OR au.type = 3)  
    UNION ALL  
    SELECT object_name(object_id) AS name,object_id,index_id, allocation_unit_id  
    FROM sys.allocation_units AS au  
    INNER JOIN sys.partitions AS p   ON au.container_id = p.partition_id AND au.type = 2  
) AS obj ON bd.allocation_unit_id = obj.allocation_unit_id  
LEFT JOIN sys.indexes i(nolock) on obj.object_id = i.object_id AND obj.index_id = i.index_id    
WHERE database_id = db_id() AND obj.name NOT LIKE ‘sys%‘  
GROUP BY obj.name ,obj.index_id,i.name  
ORDER BY cached_pages_count DESC;  
  
-- 统计当前内存分配情况  
select   
physical_memory_in_bytes / 1024 / 1024 as physical_memory_mb,  
virtual_memory_in_bytes / 1024 / 1024 as virtual_memory_mb,  
bpool_committed * 8 / 1024 as bpool_committed_mb,  
bpool_commit_target * 8 / 1024 as bpool_target_mb,  
bpool_visible * 8 / 1024 as bpool_visible_mb  
from sys.dm_os_sys_info  
  
  
--当前内存脏页数量及大小  
SELECT db_name(database_id) AS ‘Database‘  
,count(page_id) AS ‘Dirty Pages‘  
,count(page_id)*8/1024 AS ‘Dirty Pages(MB)‘  
FROM sys.dm_os_buffer_descriptors(nolock)  
WHERE is_modified =1  
GROUP BY db_name(database_id)  
ORDER BY ‘Dirty Pages‘ DESC  
  
  
--缓存类型数量大小  
select cacheobjtype as [Cached Type]  
,COUNT(*) [Number of Plans]   
,SUM(CONVERT(BIGINT,size_in_bytes))/1024/1024 [Plan Cache Size(MB)]  
from sys.dm_exec_cached_plans   
group by cacheobjtype   
order by [Plan Cache Size(MB)] desc  
  
  
--缓存对象数量大小  
select objtype as [Cached Object Type]  
,COUNT(*) as [Number of Plans]   
,SUM(CONVERT(BIGINT,size_in_bytes))/1024/1024 [Plan Cache Size(MB)]  
,avg(usecounts) [Avg Use Count]   
from sys.dm_exec_cached_plans   
group by objtype   
order by [Plan Cache Size(MB)] desc  
  
--内存对象  
SELECT top 10 * FROM sys.dm_os_memory_cache_counters(nolock)  
ORDER BY entries_count DESC;  
  
SELECT * FROM sys.dm_os_memory_clerks a  
WHERE name=‘TokenAndPermUserStore‘  
  
SELECT * FROM sys.dm_os_memory_cache_entries(nolock)  
WHERE [type]=‘USERSTORE_TOKENPERM‘ and name=‘TokenAndPermUserStore‘  
  
  
--缓存分析对象  
SELECT * FROM sys.syscacheobjects   
SELECT * FROM sys.dm_exec_cached_plans  
  
  
--即时查询优化（运行即生效）  
EXEC sp_configure ‘show advanced options‘,1  
RECONFIGURE  
EXEC sp_configure ‘optimize for ad hoc workloads‘,1  
RECONFIGURE

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