我在一所学校工作，学校大约有 500 台计算机。我们安装了代理 SQUID 来过滤成人网站等。服务器有 32g RAM 和足够的存储空间。但是当客户端太多时，浏览速度会变得太慢。-可能是什么原因？-一个代理服务器不足以容纳 500 个客户端吗？
Squid.conf：
# /etc/squid/squid.conf
acl localnet src xxx.xxx.xxx.xxx/xx
acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl CONNECT method CONNECT
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost manager
http_access deny manager
http_access allow localnet
http_access allow localhost
http_access deny all
http_port 3128
cache_mem 20480 MB
cache_dir aufs /dev/partage 200000 16 256
cache_dir aufs /dev/data 200000 16 256
cache_log /var/log/squid/cache.log
cache_access_log /var/log/squid/access.log
cache_store_log /var/log/squid/store.log
logfile_rotate 10
dns_nameservers xxx.xxx.xxx.xxx 1.1.1.1 1.0.0.1
dns_v4_first on
positive_dns_ttl 12 hours
negative_dns_ttl 1 minutes
fqdncache_size 4096
#maximum_object_size 4 MB
minimum_object_size 0 KB
maximum_object_size 96 MB
memory_cache_mode always
memory_replacement_policy lru
acl srv_interne dst xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx
cache deny srv_interne
coredump_dir /var/spool/squid
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern \/(Packages|Sources)(|\.bz2|\.gz|\.xz)$ 0 0% 0 refresh-ims
refresh_pattern \/Release(|\.gpg)$ 0 0% 0 refresh-ims
refresh_pattern \/InRelease$ 0 0% 0 refresh-ims
refresh_pattern \/(Translation-.*)(|\.bz2|\.gz|\.xz)$ 0 0% 0 refresh-ims
refresh_pattern . 0 20% 4320
url_rewrite_program /usr/bin/squidGuard
url_rewrite_children 8
max_filedesc 4096