--buffer中緩存每個(gè)數(shù)據(jù)庫(kù)所占的buffer ?

SET TRAN ISOLATION LEVEL READ UNCOMMITTED ?

SELECT ?

? ?ISNULL(DB_NAME(database_id), 'ResourceDb') AS DatabaseName ?

? ?, CAST(COUNT(row_count) * 8.0 / (1024.0) AS DECIMAL(28,2)) ?

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AS [Size (MB)] ?

FROM sys.dm_os_buffer_descriptors ?

GROUP BY database_id ?

ORDER BY DatabaseName ?

--當(dāng)前數(shù)據(jù)庫(kù)中每個(gè)表所占緩存的大小和頁(yè)數(shù) ?

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED ?

SELECT ?

? ? OBJECT_NAME(p.[object_id]) AS [TableName] ?

? ? , (COUNT(*) * 8) / 1024 ? AS [Buffer size(MB)] ?

? ? , ISNULL(i.name, '-- HEAP --') AS ObjectName ?

? ? , ?COUNT(*) AS NumberOf8KPages ?

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 p.[object_id] > 100 ?

GROUP BY p.[object_id], i.name ?

ORDER BY NumberOf8KPages DESC ?

--數(shù)據(jù)庫(kù)級(jí)別等待的IO ?

SET TRAN ISOLATION LEVEL READ UNCOMMITTED ?

SELECT DB_NAME(database_id) AS [DatabaseName] ?

?, SUM(CAST(io_stall / 1000.0 AS DECIMAL(20,2))) AS [IO stall (secs)] ?

?, SUM(CAST(num_of_bytes_read / 1024.0 / 1024.0 AS DECIMAL(20,2))) ?

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?AS [IO read (MB) ?

?, SUM(CAST(num_of_bytes_written / 1024.0 / 1024.0 ?AS DECIMAL(20,2))) ?

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AS [IO written (MB) ?

?, SUM(CAST((num_of_bytes_read + num_of_bytes_written) ?

? ? ? ? ? ? ? ? ? / 1024.0 / 1024.0 AS DECIMAL(20,2))) AS [TotalIO (MB) ?

FROM sys.dm_io_virtual_file_stats(NULL, NULL) ?

GROUP BY database_id ?

ORDER BY [IO stall (secs)] DESC ?

--按文件查看IO情況 ?

SET TRAN ISOLATION LEVEL READ UNCOMMITTED ?

SELECT DB_NAME(database_id) AS [DatabaseName] ?

?, file_id ?

?, SUM(CAST(io_stall / 1000.0 AS DECIMAL(20,2))) AS [IO stall (secs)] ?

?, SUM(CAST(num_of_bytes_read / 1024.0 / 1024.0 AS DECIMAL(20,2))) ?

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AS [IO read (MB)] ?

?, SUM(CAST(num_of_bytes_written / 1024.0 / 1024.0 ?AS DECIMAL(20,2))) ?

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?AS [IO written (MB)] ?

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?, SUM(CAST((num_of_bytes_read + num_of_bytes_written) ?

? ? ? ? ? ? ? ?/ 1024.0 / 1024.0 AS DECIMAL(20,2))) AS [TotalIO (MB)] ?

FROM sys.dm_io_virtual_file_stats(NULL, NULL) ?

GROUP BY database_id, file_id ?

ORDER BY [IO stall (secs)] DESC ?

轉(zhuǎn)載于:https://blog.51cto.com/dayday/1272685

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