I have an apache 1.3.39 and i would like to increase the logs that i keep from 1 day to 3-4 days maximum per log file and if possible logs to split for archiving reasons after the 3 days period and create a new one.

thanks again

You should look at your logrotate configuration. You can specify when to rotate by size, day, etc...

The logrotate data can be found in /etc/logrotate.d/.