Re: [squid-users] 2.5.STABLE3 performance issues

tis 2007-03-13 klockan 11:49 -0600 skrev Steven Engebretson:

> Any ideas where I should begin my search for performance improvements? I
> can send copies of my .conf files to anybody interested in helping. They
> are large, as all of the descriptive text is still there.

Step by step, continue to the next when satisfied with the results.

1. Download speed when downloading content to the Squid server, without
using the proxy.

   wget http://some.url/file

if not satisfactory then check cabling and link negotiation
capabilities. Something wrong there..

2. Download speed when downloading content to the Squid server, while
using the proxy.

   http_proxy=http://localhost:3128 wget http://some.url/file

if not satisfactory then something wrong with your Squid. Exactly what
is not easy to say from this small amount of data, but verify that the
proxy server isn't short on memory and swapping (quite common error).

3. Repeat 1 above, but this time while having an active transfer from
the proxy server to a lan station.

   wget http://some.url/file

while you at the same time upload large content to a local FTP server or
similar, or request large content from an http or ftp server running on
the Squid server.

if not satisfactory then check cabling and link negotiation
capabilities. Quite likely the network connection has been negotiated
wrongly and the proxy and switch does not agree on the type of network.

this assumes the proxy is connected with a single NIC. If multiple NICs
then you need to adjust the test such that the same NIC is being used
for both requests.

For reliable results it's important that the destination where data is
sent is local on the LAN. The test is of the LAN connection, not the
Internet, and needs to max out the NIC transmit capability to reliably
detect network errors.

Regards
Henrik