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SQL Server 数据库不会收缩

[英]SQL Server database won't shrink

原文 2015-07-31 15:56:33 3 2 sql/ database/ sql-server-2012/ shrink/ dbcc

I have a 31 GB database I got from a customer for a project.我有一个 31 GB 的数据库，我从客户那里获得了一个项目。 I'm coding and keeping the database in a 80GB Win7 VM.我正在编写代码并将数据库保存在 80GB 的 Win7 VM 中。 I got the db file and imported the database from that, and found that the space was being eaten up mostly by one table, with 240,000 images.我得到了 db 文件并从中导入了数据库，发现空间大部分被一张桌子吃掉了，有 240,000 张图像。 I dropped most of those rows and now have 29,000MB available.我删除了其中的大部分行，现在有 29,000MB 可用。 I can't perform lots of functions because the drive is down to it's last few GB, and there are still a lot of records to modify (I'm changing a data type in several tables, but keep getting a active_transaction error).我无法执行很多功能，因为驱动器已降至最后几 GB，而且仍有大量记录需要修改（我正在更改多个表中的数据类型，但不断收到 active_transaction 错误）。 It's not shrinking via DBCC_SHRINKDATABASE(0) or Tasks > Shrink > Database or Files.它不会通过DBCC_SHRINKDATABASE(0)或Tasks > Shrink > Database或文件进行Tasks > Shrink > Database 。 It only shrinks to the size of the database when I first got it, it seems.当我第一次得到它时，它似乎只会缩小到数据库的大小。 How do I get it to release that space?我如何让它释放那个空间？ If I can', can I export what data is still there to a smaller database, and then restore from that?如果可以，我可以将仍然存在的数据导出到较小的数据库，然后从中恢复吗？

Running SQL Server 2012 and Management Studio.运行 SQL Server 2012 和 Management Studio。

Thanks,谢谢，

Tony托尼

2 个解决方案

You cannot dbcc shrinkdatabase below the initial size setting.您不能将dbcc shrinkdatabase低于初始大小设置。 If the initial size of your database is set to 50GB -- the MDF will always be at least 50GB, even if 29GB is free/available.如果您的数据库的初始大小设置为 50GB——MDF 将始终至少为 50GB，即使 29GB 是免费/可用的。

If you do in fact have free space, you can lower the initial size setting to a more reasonable value - but if the MDF will simply auto-grow again, this is not advised, as it incurs a high overhead.如果您确实有可用空间，则可以将初始大小设置降低到更合理的值 - 但如果 MDF 将再次自动增长，则不建议这样做，因为它会导致高开销。

To do this you would use dbcc shrinkfile .为此，您将使用dbcc shrinkfile 。

Please see here for more information.请参阅此处了解更多信息。

This page describes how to make SQL server backups.本页介绍如何进行 SQL 服务器备份。 https://msdn.microsoft.com/en-us/library/ms186865(v=sql.110).aspx https://msdn.microsoft.com/en-us/library/ms186865(v=sql.110).aspx

If you haven't done so already, you will need to take a full backup before you can do a transaction log backup.如果您还没有这样做，则需要先进行完整备份，然后才能进行事务日志备份。