表磁盤空間使用情況的文件組，分區MSSQLSERVER

Question

我已經劃分在一個MSSQLSERVER數據庫表。我可以檢查一個表中的數據如何分佈在每個文件組和分區上嗎？

Answer 1

我發現這是一個很好的腳本：

https://web.archive.org/web/20140519033945/http://williamweber.net/table-disk-space-usage-by-filegroup-and-partition/

SELECT 
    DB_NAME() AS 'DatabaseName' 
    ,OBJECT_NAME(p.OBJECT_ID) AS 'TableName' 
    ,p.index_id AS 'IndexId' 
    ,CASE 
     WHEN p.index_id = 0 THEN 'HEAP' 
     ELSE i.name 
    END AS 'IndexName' 
    ,p.partition_number AS 'PartitionNumber' 
    ,prv_left.VALUE AS 'LowerBoundary' 
    ,prv_right.VALUE AS 'UpperBoundary' 
    ,CASE 
     WHEN fg.name IS NULL THEN ds.name 
     ELSE fg.name 
    END AS 'FileGroupName' 
    ,CAST(p.used_page_count * 0.0078125 AS NUMERIC(18,2)) AS 'UsedPages_MB' 
    ,CAST(p.in_row_data_page_count * 0.0078125 AS NUMERIC(18,2)) AS 'DataPages_MB' 
    ,CAST(p.reserved_page_count * 0.0078125 AS NUMERIC(18,2)) AS 'ReservedPages_MB' 
    ,CASE 
     WHEN p.index_id IN (0,1) THEN p.ROW_COUNT 
     ELSE 0 
    END AS 'RowCount' 
    ,CASE 
     WHEN p.index_id IN (0,1) THEN 'data' 
     ELSE 'index' 
    END 'Type' 
FROM sys.dm_db_partition_stats p 
    INNER JOIN sys.indexes i 
     ON i.OBJECT_ID = p.OBJECT_ID AND i.index_id = p.index_id 
    INNER JOIN sys.data_spaces ds 
     ON ds.data_space_id = i.data_space_id 
    LEFT OUTER JOIN sys.partition_schemes ps 
     ON ps.data_space_id = i.data_space_id 
    LEFT OUTER JOIN sys.destination_data_spaces dds 
     ON dds.partition_scheme_id = ps.data_space_id 
     AND dds.destination_id = p.partition_number 
    LEFT OUTER JOIN sys.filegroups fg 
     ON fg.data_space_id = dds.data_space_id 
    LEFT OUTER JOIN sys.partition_range_values prv_right 
     ON prv_right.function_id = ps.function_id 
     AND prv_right.boundary_id = p.partition_number 
    LEFT OUTER JOIN sys.partition_range_values prv_left 
     ON prv_left.function_id = ps.function_id 
     AND prv_left.boundary_id = p.partition_number - 1 
WHERE 
    OBJECTPROPERTY(p.OBJECT_ID, 'ISMSSHipped') = 0 
    --AND p.index_id in (0,1) 

這裏的數據列的快速解釋拉進，根據筆者：

默認情況下數據在MSSQL頁是8KB，就是這樣 我與此查詢作出假設。

Used_Pages: the number of pages actually used by the table including non-leaf B-tree pages and IAM pages. 
Reserved_Pages: is the number of pages being reserved in total for the object, whether used or not. 
Data_Pages: the number of pages being used excluding non-leaf B-tree pages. 

這裏向BOL頁面的鏈接，介紹了這些： msdn.microsoft.com/en-us/library/ms187737.aspx