Thanks Gail. I increased the frequency of logbackups.

I tried shrinking because, my log file size is 60 GB and a log backup releasing 90% of space.

that was my prod DB and my disk left with only 500 MB space left.

I thought of shrinking and release some gigs to OS to avoid any application interruption.

The problem now i am facing is, though i have 90% unused space in the log , i could not shrink it.Not sure why.

Please correct me if my approach is wrong.

Thanks for your time!