[squid-users] Re: intermittent hangings to one or another of the 30 users on squid.

Would it be smart to benchmark squid during the day by running a
script that fetches a file every 5 seconds and times the amount of
time it took to download?

Iam sure there might be better ways.

Andres

On Fri, Oct 16, 2009 at 3:30 PM, Andres Salazar <ndrsslzr80_at_gmail.com> wrote:
> Hello,
>
> I have 30 users who browse the internet all day through squid. My
> version is squid-2.7.STABLE6 . I started squid with 5024 file
> descriptors, cache is disabled and its a machine solely dedicated to
> this with P4 CPU with PowerEdge 600SC and 1GB RAM.
>
> The problem is that intermittently during the day one or another user
> for a few minutes opens pagesand they just take forever to download.
> The strange part is that when it happens to some users it doesnt
> happen simulteanously to all the others. They are ubuntu users with
> firefox.
>
> Its extremely hard to diagnose this because its very hard to catch and
> sometimes when the tech arrives all the pages start loading fine. Even
> google would hang.
>
> There is no packet loss to the proxy server, and load on the CPU is
> low according to top.
>
>
> What tool can I use to pinpoint exactly where the problem is?
>
>
> cache_dir null /dev/null
> auth_param basic program /usr/local/libexec/ncsa_auth /etc/squid/squid_passwd
> 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 localnet src 10.0.0.0/8     # RFC1918 possible internal network
> acl localnet src 172.16.0.0/12  # RFC1918 possible internal network
> acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
> 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 ncsa_users proxy_auth REQUIRED
> http_access allow manager localhost
> http_access deny manager
> http_access deny !Safe_ports
> http_access deny CONNECT !SSL_ports
> http_access allow localnet
> http_access allow all
> icp_access allow localnet
> icp_access deny all
> reply_body_max_size 512000 deny all
> http_port 8080 transparent
> hierarchy_stoplist cgi-bin ?
> access_log /var/squid/logs/access.log squid
> 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.[0-9]
> upgrade_http0.9 deny shoutcast
> via off
> acl apache rep_header Server ^Apache
> broken_vary_encoding allow apache
> header_replace User-Agent Nutscrape/1.0 (CP/M; 8-bit)
> max_filedescriptors  5024
> forwarded_for off
> coredump_dir /var/squid/cache
>
>
> Thank you.
>
> Regards,
> Andres
>
Received on Fri Oct 16 2009 - 20:32:24 MDT