Reduce impact on SQL logs
Please, try to analyze your backup strategies.

Also, You can analyze your DATABASE MODE (FULL, Bulk-Logged, Simple)
(https://msdn.microsoft.com/en-us/library/ms189275.aspx)

Also, you can check log space with:

DBCC SQLPERF(LOGSPACE);  
GO  


check this: https://msdn.microsoft.com/en-us/library/ms190674.aspx