SQL Server log cleanup

Clearing the log in SQL Server must be done in simple mode, and then back to full mode when the purge action is complete.

*[databasename] The name of the database to compress the log.

Setting the database schema to Simple mode

ALTER DATABASE SET  with no_wait    ALTER DATABASE SET RECOVERY Simple

Querying log files for Filedid

SELECT *  from Sysfiles

Fill in the Filedid of the log with the first argument in parentheses in the following statement, where the second parameter refers to how many megabytes (M) the log is compressed

--Log will be compressed to 100M after execution

DBCC Shrinkfile (2,+)

Revert to Full mode

ALTER DATABASE SET  Full  with no_wait ALTER DATABASE SET  Full

Advantages: This cleanup log runs short of time, 90GB of log can be cleared in minutes or so, after the completion of a complete preparation-the part can be completed within minutes.

Cons: But this action is best not to be used frequently, as it will result in system fragmentation. Backup of log and diff in normal state--logs can be truncated.

SQL Server 2008 versions of the applicable statements

BACKUP LOG [DataBaseName]  with no_log DBCC Shrinkdatabase ([DataBaseName], truncateonly)

SQL Server log cleanup