Shrink SQL Database Log Files

Source: Internet
Author: User

1. Clear logs
Dump transaction database name with no_log

2. truncate transaction logs:
Backup log library name with no_log

3. Compress database files (if not compressed, the database files will not be reduced
Enterprise Manager -- Right-click the database you want to compress -- all tasks -- contract database -- contract file
-- Select log file -- select to shrink to xxm in the contraction mode. Here, a minimum number of MB allowed to be shrunk is displayed. Enter this number directly and click OK.
-- Select data file -- select to shrink to xxm in the contraction mode. Here, a minimum number of MB allowed to be shrunk is displayed. Enter this number directly and click OK.

You can also use SQL statements to complete
-- Shrink Database
DBCC shrinkdatabase (database name)

-- Contract the specified data file. 1 is the file number. You can use this statement to query: Select * From sysfiles
DBCC shrinkfile (1)

4. To minimize log files (for SQL 7.0, this step can only be performed in the query analyzer)
A. Separate the database:
Enterprise Manager -- server -- database -- Right-click -- detach Database

B. Delete log files in my computer

C. Additional database:
Enterprise Manager -- server -- database -- Right-click -- attach Database

This method generates a new log with a size of more than 500 K.

Or useCode:
The following example separates pubs and attaches a file in pubs to the current server.

A. Separation
Exec sp_detach_db @ dbname = 'database name'

B. Delete log files

C. Attach
Exec sp_attach_single_file_db @ dbname = 'database name ',
@ Physname = 'C: \ Program Files \ Microsoft SQL Server \ MSSQL \ data \ database name. MDF'

5. In order to automatically contract in the future, make the following settings:
Enterprise Manager -- server -- Right-click Database -- Property -- option -- select "auto contract"

-- SQL statement setting method:
Exec sp_dboption 'database name', 'autowrite', 'true'

6. If you want to prevent the log from increasing too much in the future
Enterprise Manager -- server -- Right-click Database -- properties -- transaction log
-- Limit file growth to xm (X is the maximum data file size you allow)

-- SQL statement settings:
Alter database name Modify file (name = logical file name, maxsize = 20)

Generally, perform steps 1, 2, and 3.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.