Hi, It looks as though the log is off by default...
Check this page for more...
http://www.squid-cache.org/Doc/config/access_log/
I have not found squidview for Mandriva, But there are source packages for it.
I'm sorry I can't help you further.
This page is a good place to start...Check your version for each, Listed at the top in red fonts.
http://www.squid-cache.org/Doc/config/
All the best, Glenn
ps. Log-file rotate, when a new log file is created the old ones are all zipped and renamed, for example...
cache.log.3.gz becomes cache.log.4.gz
cache.log.2.gz becomes cache.log.3.gz
cache.log.1.gz becomes cache.log.2.gz
cache.log will become cache.log.1.gz
The new (current) file is named cache.log