compilando o squid para cache_dir diskd ?

boa noite pessoal

meu squid ja esta instalado no slackware 11 c/:
HD sata 160gb
P4
1512gb de Momoria
2 placa de rede Tricon
80 Maquinas Conectadas simutania
4 MB de link
cache dns

So que fica lento depois de dois dias

alguem poderia me dizer como eu sei se essa configuração esta funcionando mesmo, porque segundo algumas dicas na net tem que compilar o Kernel para habilitar o (cache diskd no squid

ou colocar umas regras em "/etc/sysctl.conf" mas no slackware nao tem esse aquivo.

vai ai meu squid

hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
no_cache deny QUERY
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320
maximum_object_size 2048 KB
maximum_object_size 0 KB
cache_mem 1000 MB
cache_swap_low 90
cache_swap_high 95
#cache_dir ufs /var/cache/squid 20000 16 128
cache_dir diskd /var/cache/squid 10000 16 256 Q1=64 Q2=72
cache_access_log /var/log/squid/access.log
cache_log /var/log/squid/cache.log
shutdown_lifetime 10 seconds
detect_broken_pconn on
ftp_user Squid@
# ACLS
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl SSL_ports port 443 563
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 563 # https, snews
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
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow all
icp_access allow all
visible_hostname on
httpd_accel_host virtual
httpd_accel_port 80


agradeço