Checkpoint--查看各DB上的脏页
可以使用sys.dm_os_buffer_descriptors来看数据页在buffer pool中的状态，其中is_modified来标示数据页是否为脏页
-----------------------------------------------------------------------------------------------------------------------
--查看各DB上的脏页
SELECT DB_NAME(database_id) AS DBName
,COUNT(1) AS
DirtyPageCount
FROM sys.dm_os_buffer_descriptors
WHERE
is_modified=1
GROUP BY database_id
查看某个DB上脏页的分布情况
SELECT OBJECT_NAME(p.[object_id]) AS [TableName]
,
ISNULL(i.name, ‘-- HEAP --‘) AS ObjectName
, COUNT(1) AS
PagesCount
FROM sys.allocation_units AS a
INNER JOIN
sys.dm_os_buffer_descriptors AS b
ON a.allocation_unit_id =
b.allocation_unit_id
INNER JOIN sys.partitions AS p
INNER JOIN
sys.indexes i
ON p.index_id = i.index_id
AND p.[object_id] =
i.[object_id]
ON a.container_id = p.hobt_id
WHERE
b.database_id = DB_ID()
AND B.is_modified=1
GROUP BY p.[object_id],
i.name
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