[SQU] increasing performance

hello guys
I discover that puting
/etc/rc.d/init/squid stop
/etc/rc.d/init/squid start in my CRONTAB, ton run every hour
my system increase the porfomance..., i have a 64 kbit conection,
with a lan with 50 stations (squid as transparent proxy).
Why may be???I think that my users download to large files from
internet (.mp3 files , .mpeg movies) with programs as "netvampire".
The question is: When I restart squid, as mentioned above, the
cache files is restarting to 0 files??
Regards, Fabian

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