这篇文章给大家分享的是有关数据库的硬盘空间如何使用的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。
SQL Server占用的存储空间，包含数据库file占用的存储空间，数据库对象占用的存储空间。
一，数据库file占用的存储空间
1，使用 sys.master_files 查看数据库中各个file占用的存储空间
select db.name as database_name,
db.is_auto_shrink_on,
db.recovery_model_desc,
mf.file_id,
mf.type_desc,
mf.name as logic_file_name,
mf.size*8/1024/1024 as size_gb,
mf.physical_name, --mf.max_size, mf.growth,
mf.is_percent_growth,
mf.state_descfrom sys.databases db
inner join sys.master_files mf
on db.database_id=mf.database_idwhere mf.size*8/1024/1024>1 -- GBorder by size_gb desc2，使用sp_spaceused 查看当前DB的空间使用量
use DB_Studygoexec sys.sp_spaceused
database_size：database_size includes both data and log files.
数据文件的空间利用信息：
unallocated space ：Space in the database that has not been reserved for database objects.
reserved：Total amount of space allocated by objects in the database.
data：Total amount of space used by data.
index_size：Total amount of space used by indexes.
unused ：Total amount of space reserved for objects in the database, but not yet used.
database_size will always be larger than the sum of reserved + unallocated space because it includes the size of log files, but reserved and unallocated_space consider only data pages.
3， 按照extent统计data file的disk space usage
从系统page：GAM 和 SGAM 上读取Extent allocate 信息，计算data file有多少extent allocated 或 unallocated。
计算公式：1Extent=8Pages，1Page=8KB
dbcc showfilestats
4， 统计SQL Server 实例中所有数据库的日志文件的disk space usage
dbcc sqlperf(logspace) 返回的结果总是准确的，语句的执行不会对sql server增加负担
dbcc sqlperf(logspace)
二，查看数据库中，各个table 或index 所占用的disk space
1，查看数据库所有table 或index 所占用的disk space
select
t.name, sum(case when ps.index_id<2 then ps.row_count else 0 end) as row_count, sum(ps.reserved_page_count)*8/1024/1024 as reserved_gb, sum(ps.used_page_count)*8/1024 as used_mb, sum( case when ps.index_id<2
then ps.in_row_data_page_count+ps.lob_used_page_count+ps.row_overflow_used_page_count else 0 end
)*8/1024 as data_used_mb, sum(case when ps.index_id>=2
then ps.in_row_data_page_count+ps.lob_used_page_count+ps.row_overflow_used_page_count else 0 end
)*8/1024 as index_used_mbfrom sys.dm_db_partition_stats psinner join sys.tables t on ps.object_id=t.object_idgroup by t.object_id, t.nameorder by reserved_gb desc
2，在当前DB中，查看某一个Table object 空间使用信息
exec sp_spaceused 'dbo.dt_study'
rows:Number of rows existing in the table.
reserved:Total amount of reserved space for objname.
data:Total amount of space used by data in objname.
index_size:Total amount of space used by indexes in objname.
unused:Total amount of space reserved for objname but not yet used.
三，使用Standard Reports 查看disk space usage
四，查看服务器各个逻辑盘符剩余的disk space
Exec master.sys.xp_fixeddrives
Appendix：
查看数据库中table，indexed等对象的disk空间使用量，但是返回的结果并不十分精确。
sp_spaceused Displays the number of rows, disk space reserved, and disk space used by a table, indexed view, or Service Broker queue in the current database, or displays the disk space reserved and used by the whole database.
Syntax
sp_spaceused [[ @objname = ] 'objname' ]
[,[ @updateusage = ] 'updateusage' ]感谢各位的阅读！关于“数据库的硬盘空间如何使用”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，让大家可以学到更多知识，如果觉得文章不错，可以把它分享出去让更多的人看到吧！
