cel.MYD too big

General Help
1

Hi my cel.MYD is getting too big for my liking. Can someone show me how to delete some entries on it?

Thanks.

Here is my ls -lh /var/lib/mysql/asteriskcdrdb/

total 6.4G
-rw-rw----. 1 mysql mysql 14K Mar 15 2017 cdr.frm
-rw-rw----. 1 mysql mysql 707M Oct 13 05:50 cdr.MYD
-rw-rw----. 1 mysql mysql 190M Oct 13 05:50 cdr.MYI
-rw-rw----. 1 mysql mysql 14K Mar 15 2017 cel.frm
-rw-rw----. 1 mysql mysql 4.6G Oct 13 05:50 cel.MYD
-rw-rw----. 1 mysql mysql 964M Oct 13 05:50 cel.MYI
-rw-rw----. 1 mysql mysql 61 Mar 15 2017 db.opt