weird big files on /var/lib/mysql

hello

it have around 4 GBs of "weird" files on /var/lib/mysql/ :

Code: 
-rw-rw----    1 mysql    mysql    884591385 Aug 31 13:12 server01-bin.040
-rw-rw----    1 mysql    mysql    338075108 Aug 19 13:18 server01-bin.037
-rw-rw----    1 mysql    mysql    259606881 Aug  7 00:01 server01-bin.012
-rw-rw----    1 mysql    mysql    187249959 Aug 13 13:18 server01-bin.025
-rw-rw----    1 mysql    mysql    183646748 Aug  3 21:25 server01-bin.007
-rw-rw----    1 mysql    mysql    180772054 Aug 11 13:59 server01-bin.024
-rw-rw----    1 mysql    mysql    178334076 Sep  2 23:01 server01-bin.042
-rw-rw----    1 mysql    mysql    170336891 Aug 15 14:53 server01-bin.026
-rw-rw----    1 mysql    mysql    169432766 Aug  1 21:25 server01-bin.003
-rw-rw----    1 mysql    mysql    167245973 Aug 21 21:22 server01-bin.039
-rw-rw----    1 mysql    mysql    159532337 Sep  8 10:17 server01-bin.050
-rw-rw----    1 mysql    mysql    130853251 Jul 30 00:28 server01-bin.002
-rw-rw----    1 mysql    mysql    86619938 Sep  6 01:50 server01-bin.049
-rw-rw----    1 mysql    mysql    59315336 Aug  4 12:16 server01-bin.009
-rw-rw----    1 mysql    mysql    56766543 Aug  7 16:51 server01-bin.013
-rw-rw----    1 mysql    mysql    52681111 Aug  9 14:30 server01-bin.022
-rw-rw----    1 mysql    mysql    45345710 Aug 19 22:45 server01-bin.038
-rw-rw----    1 mysql    mysql    44196222 Sep  4 18:18 server01-bin.048
-rw-rw----    1 mysql    mysql    37138997 Aug 31 22:18 server01-bin.041
-rw-rw----    1 mysql    mysql    30388807 Aug  8 11:11 server01-bin.016
-rw-rw----    1 mysql    mysql    30180291 Sep  3 12:51 server01-bin.044
any idea what are them? may I delete it?

server is cpanel

thanks

 

 

 

 

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