Space not released after deletion of file on server

You can follow below steps from root user to clear the space if it gets stuck at kernel level

lsof +L | grep deleted
## it will show the process id, here it gave process id 21099

cd /proc/<process_id>/fd ## go to process id directory like below

cd /proc/21099/fd

l-wx------ 1 root root 64 Apr  1  2016 30 -> /u00/app/grid/diag/asm/+asm/+ASM1/trace/alert_+ASM1.log_bkup1Aug17 (deleted)

## it will show a link with some number to delete file which is still holding the space

> 30 ##then truncate the file like this, mention the number here with >

It will clear the deleted space