Shrink Database Log file for Microsoft Dynamics CRM

Question

I have Microsoft Dynamics CRM 2015 and the database file (.mdf) is around 20 Gb and the Log file (.ldf) is about 550 Gb. I tried shrinking ldf file as discussed in this link

However, after the database log file was shrink, CRM stopped working. Can anyone advise.

Answer 1

CRM stopped working

What error messages do your receive?

Just based on my assumptions:

Obviously that database is not in a SIMPLE recovery mode and no scheduled backup of the transaction log configured.

1. First of all, make sense to check why you cannot shrink the log:

 SELECT name, log_reuse_wait_desc, recovery_model_desc FROM sys.databases WHERE name = 'yourDB'

2. Then, you may set the database to a SIMPLE recovery:

ALTER DATABASE [yourDB] SET RECOVERY SIMPLE

OR, fix your backup of transaction log if, this is a reason

3. then you have to shrink the log:

USE [yourDB] DBCC SHRINKFILE (2, 256)

When your database back to the operational state you have to decide what kind of backup scheme do you want yo have:

• Full/diff backups per day every night
• Full/diffs overnigt and Transactional backups every n minutes.

Depends on a choice, you will have to stay with SIMPLE recovery or switch back to FULL, but add missing scheduled backups of your transaction log