How to stop and control .bdb file generation on oracle rac

Step 1. Stop the Cluster Health Monitor resource ora.crf as grid owner
[grid@rac1 ~]$crsctl stop res ora.crf -init
CRS-2673: Attempting to stop 'ora.crf' on 'rac1'
CRS-2677: Stop of 'ora.crf' on 'rac1' succeeded

Step 2. Remove the huge CHM(.bdb) files
The file can only be removed by the root user as it is owned by root.

$cd $GI_HOME/crf/db/[nodename]
$rm -rf *.bdb
Example:
[root@rac1 ~]$cd /app/grid/11.2.0.4/crf/db/rac1
[root@rac1]$rm -rf  *.bdb

Step 3. Start the Cluster Health Monitor resource ora.crf
[grid@rac1 ~]$crsctl start res ora.crf -init
CRS-2672: Attempting to start 'ora.crf' on 'rac1'
CRS-2676: Start of 'ora.crf' on 'rac1' succeeded

Step 4. To control .bdb file generation
run below command through grid user.it allowed to change Cluster Health Monitor repository size
$ oclumon manage -repos resize 259200
rac1 --> retention check successful
rac2 --> retention check successful
New retention is 259200 and will use 4524595200 bytes of disk space