按內存劃分:

1.DATABASE CACHE

? ? 用于存放數據頁面的緩沖區，8KB每頁

2.各項組件

? ? A)數據庫連接(CONNECTION)

? ? B)通用數據，如果事務上下文，表和索引的元數據

? ? C)執行計劃(QUERY PLAN)，語句和存儲過程的執行計劃

? ? D)查詢優化器(Optimizer)

? ? E)Utilities,如BCP,Log Manager,Backup tools,parallel queries and so on

3.線程內存

? ? Each thread use 0.5MB memory to store data structure and relative infomation

4.The third application apply memeory

? ? like link server, sql mail, user defined CLR,Extended stored procedure,dirver ect

?

Divided by Apply method:

1.Reserved and committed memory, reserved first and then committed.

2.Stolen memory,commited without reserving memory.

?

SQL SERVER never use AWE for stolen memery

?

?

Divided by Page size:

1.Single page memory,the applied memory is equal or less then 8KB

2.Multiple page memory(MemToLeave), the applied?memery is bigger than 8KB

?

the most part of memery in MemToLeave is not charged by SQL SERVER

?

SQL SERVER使用Memory Clerk來管理SQL SERVER內存的分配和回收，因此可以使用sys.dm_os_memory_clerks 來查看內存使用情況，注意sys.dm_os_memory_clerks反應的內存不包括第三方代碼使用的內存。

?

SELECT M.type,

sum(M.virtual_memory_reserved_kb) AS VirtualMemoryReservedKB,

SUM(M.virtual_memory_committed_kb) AS VirtualMemortCommitedKB,

SUM(M.shared_memory_committed_kb) AS SharedMemroyCommittedKB,

SUM(M.shared_memory_reserved_kb) AS SharedMemroyReservedKB,

SUM(M.multi_pages_kb) AS MultiPagesKB,

SUM(M.single_pages_kb) AS SinglePagesKB,

SUM(M.multi_pages_kb)+SUM(M.single_pages_kb) AS TotalPagesKB

FROM sys.dm_os_memory_clerks M

GROUP BY M.type

ORDER BY TotalPagesKB DESC

?

?

?

查看表中數據在緩沖池中的信息

SELECT name AS TabelName,

index_id AS IndexId,

COUNT(*)AS CachedPageCount,

CAST(COUNT(*)*8.0/1024 AS INT) AS CachedMemoryMB?

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.partition_id?

? ? ? ? ? ? ? ? ? ? AND au.type = 2

? ? ) AS obj?

? ? ? ? ON bd.allocation_unit_id = obj.allocation_unit_id

WHERE database_id = DB_ID()

GROUP BY name, index_id?

ORDER BY CachedMemoryMB DESC;

轉載于:https://www.cnblogs.com/TeyGao/p/3519001.html

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