[FUG-BR] Problemas com cache usando Lusca e freebsd 8.0 64bts

[Joao Pedro Paula Pannain Souza]

Boa noite,
por favor me ajudem. instalei e configurei um servidor de cache. Durante o
dia quando a carga de trabolho é pequena ele funciona muito bem.
Porém quando muitos usuarios fazem requisiçoes ele vem demostrando um
comportamento anormal gerando muita lentidao na rede.
Acompanhando o trafego na placa de rede percebemos q ele vai de 30 mb a 1 mb
e vouta a subir em menos de 5 segundos.
 Segue minha configuraçao  = squid.conf
acl all src all
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 70          # gopher
acl Safe_ports port 210         # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl CONNECT method CONNECT
acl provedor src 192.168.0.0/16
acl provedor src 10.0.0.0/8
acl provedor src 127.0.0.1/32

http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow provedor
http_access deny all
icp_access allow provedor
icp_access deny all
# htcp_access allow provedor
# htcp_access deny all
# miss_access allow all
http_port 3128 transparent
zph_mode tos
zph_local 0x10
# zph_sibling 0
# zph_parent 0
cache_mem 3072 MB
maximum_object_size_in_memory 150 KB
cache_replacement_policy heap LFUDA
cache_dir aufs /cache/hd1 100000 16 256
cache_dir aufs /cache/hd2 100000 16 256
cache_dir aufs /cache/hd3 100000 16 256
cache_dir aufs /cache/hd4 100000 16 256
cache_dir aufs /cache/hd5 100000 16 256
cache_dir aufs /cache/hd6 100000 16 256
maximum_object_size 700 MB
access_log none
logfile_daemon /usr/local/lusca/libexec/logfile-daemon
cache_log /var/log/squid/cache.log
cache_store_log none
logfile_rotate 10
pid_filename /usr/local/lusca/squid.pid
debug_options ALL,1
log_fqdn off
client_netmask 255.255.255.255
netdb_filename /usr/local/lusca/netdb/netdb.state
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern .               0       20%     4320
acl shoutcast rep_header X-HTTP09-First-Line ^ICY\s[0-9]
upgrade_http0.9 deny shoutcast
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
cache_effective_user squid
cache_effective_group squid
httpd_suppress_version_string on
coredump_dir /usr/local/lusca
visible_hostname xxxxxxxxxxxxxx
icp_port 0
htcp_port 0