[SOLVED] Syslog no turning

It seems that on my L5 the file /var/log/syslog is not turning:

# ls -l /var/log/syslo*
-rw-r----- 1 root adm 748340931 Jan 20 11:54 /var/log/syslog
-rw-r----- 1 root adm   5623316 Jan 15 00:00 /var/log/syslog.1
-rw-r----- 1 root adm    596357 Jan  8 00:00 /var/log/syslog.2.gz
-rw-r----- 1 root adm    913487 Jan  1 00:00 /var/log/syslog.3.gz
-rw-r----- 1 root adm    785015 Dec 25 00:00 /var/log/syslog.4.gz

# gzip -c /var/log/syslog | wc -c
3260689

How is this turnaround organized?

UPDATE:
The rotating works fine once per week. The problem is that millipixel was spamming the logs with 7 million of lines, see this post: Camera (Dev Preview) app crashing