where is rotation policy of logs under /var/log/messages-*
Solution 1:
Just type
sudo grep messages /etc/logrotate.d/*
On my system this returns
/etc/logrotate.d/rsyslog:/var/log/messages
Just type
sudo grep messages /etc/logrotate.d/*
On my system this returns
/etc/logrotate.d/rsyslog:/var/log/messages