如何在SQL Server数据库中找到最大的对象? [英] How to find largest objects in a SQL Server database?
问题描述
如何找到SQL Server数据库中最大的对象?首先,通过确定哪些表(和相关索引)最大,然后确定特定表中哪些行最大(我们将二进制数据存储在BLOB中)?
有没有任何工具来帮助这种数据库分析?
我一直在使用这个SQL脚本从某人,某处 - 不能重建谁来自),它帮助我有一定的理解和确定指数和表的大小:
SELECT
t.NAME as TableName,
i.name作为indexName,
sum(p.rows)作为RowCounts,
sum total_subages)作为TotalPages,
sum(a.used_pages)作为UsedPages,
sum(a.data_pages)作为DataPages,
(sum(a.total_pages)* 8)/ 1024作为TotalSpaceMB,
(sum(a.used_pages)* 8)/ 1024 as UsedSpaceMB,
(sum(a.data_pages)* 8)/ 1024 as DataSpaceMB
FROM
sys.tables t
INNER JOIN
sys.indexes i ON t.OBJECT_ID = i.object_id
INNER JOIN
sys.partitions p ON i.object_id = p.OBJECT_ID和i.index_id = p .index_id
INNER JOIN
sys.allocation_units a ON p.partition_id = a.container_id
WHERE
t.NAME不喜欢'dt%'AND
i.OBJECT_ID > 255 AND
i.index_id< = 1
GROUP BY
t.NAME,i.object_id,i.index_id,i.name
ORDER BY
object_name当然,您可以使用另一个排序标准,例如 $ b(
$ b ORDER BY SUM(p.rows)DESC
b $ b
获取最多行的表,或
ORDER BY SUM(a.total_pages)DESC
以获得使用最多页面(8K块)的表。
How would I go about finding the largest objects in a SQL Server database? First, by determining which tables (and related indices) are the largest and then determining which rows in a particular table are largest (we're storing binary data in BLOBs)?
Are there any tools out there for helping with this kind of database analysis? Or are there some simple queries I could run against the system tables?
解决方案 I've been using this SQL script (which I got from someone, somewhere - can't reconstruct who it came from) for ages and it's helped me quite a bit understanding and determining the size of indices and tables:
SELECT
t.NAME AS TableName,
i.name as indexName,
sum(p.rows) as RowCounts,
sum(a.total_pages) as TotalPages,
sum(a.used_pages) as UsedPages,
sum(a.data_pages) as DataPages,
(sum(a.total_pages) * 8) / 1024 as TotalSpaceMB,
(sum(a.used_pages) * 8) / 1024 as UsedSpaceMB,
(sum(a.data_pages) * 8) / 1024 as DataSpaceMB
FROM
sys.tables t
INNER JOIN
sys.indexes i ON t.OBJECT_ID = i.object_id
INNER JOIN
sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
INNER JOIN
sys.allocation_units a ON p.partition_id = a.container_id
WHERE
t.NAME NOT LIKE 'dt%' AND
i.OBJECT_ID > 255 AND
i.index_id <= 1
GROUP BY
t.NAME, i.object_id, i.index_id, i.name
ORDER BY
object_name(i.object_id)
Of course, you can use another ordering criteria, e.g.
ORDER BY SUM(p.rows) DESC
to get the tables with the most rows, or
ORDER BY SUM(a.total_pages) DESC
to get the tables with the most pages (8K blocks) used.
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