LTM log size increase

LTM log size increase.

How to increase ltm log size. currently as shown below creates new file at 40K file size.

-rw------- 1 root root 43K May 2 04:02 ltm.23.gz -rw------- 1 root root 43K May 2 04:02 ltm.22.gz -rw------- 1 root root 43K May 2 04:02 ltm.21.gz -rw------- 1 root root 43K May 2 04:02 ltm.20.gz -rw------- 1 root root 44K May 2 04:02 ltm.19.gz -rw------- 1 root root 44K May 2 04:02 ltm.18.gz -rw------- 1 root root 43K May 2 04:02 ltm.17.gz -rw------- 1 root root 43K May 2 04:02 ltm.16.gz -rw------- 1 root root 41K May 2 04:02 ltm.15.gz -rw------- 1 root root 41K May 2 04:02 ltm.14.gz -rw------- 1 root root 41K May 2 04:02 ltm.13.gz -rw------- 1 root root 113 May 2 04:02 messages.1.gz -rw------- 1 root root 40K May 2 04:02 ltm.9.gz -rw------- 1 root root 40K May 2 04:02 ltm.8.gz -rw------- 1 root root 40K May 2 04:02 ltm.7.gz -rw------- 1 root root 39K May 2 04:02 ltm.6.gz -rw------- 1 root root 40K May 2 04:02 ltm.5.gz -rw------- 1 root root 39K May 2 04:02 ltm.4.gz -rw------- 1 root root 39K May 2 04:02 ltm.3.gz -rw------- 1 root root 40K May 2 04:02 ltm.2.gz -rw------- 1 root root 17K May 2 04:02 ltm.1.gz -rw------- 1 root root 40K May 2 04:02 ltm.12.gz -rw------- 1 root root 40K May 2 04:02 ltm.11.gz -rw------- 1 root root 40K May 2 04:02 ltm.10.gz

I have increased more space in /var/log so i can increase the size of ltm log before it compress..?