Will Instant File Initialization Really Help My Databases?

This configuration help the database file growth faster, but it just applies to data file, not log file.

Please be noted that after we changed the configuration, we must restart the services to see the affect.

We can prove that by example.

Refer: http://www.brentozar.com/archive/2013/07/will-instant-file-initialization-really-help-my-databases/