Re: Our loner squid retrieiving unreqested mystery data

From: Henrik Nordstrom <>
Date: Mon, 18 Oct 1999 20:56:34 +0200

Marc Lucke wrote:
> I was wondering why Squid 2.2 stable 4 would go out & get over 300 mb
> & 100 mb the next day worth of data by itself at full speed without a
> request for it (byte hit ratios were showing negative).

I too have seen this, but I don't think I have seen it since configuring
quick_abort and range_offset_limit to be as restrictive as possible:

quick_abort_max 0 KB (16 kb is the default)
range_offset_limit 0 KB (this is the default)

I have a hinch that quick_abort does not catch all cases, but I have no
proof yet... lets make a quick test... Proven!. If a server lies about
the content length then quick_abort may be fooled to cause Squid send
any amount of data into the bit bucket with no client listening.
Configuring quick_abort to always abort when the client aborts
eleminates this special case. To make things even worse such objects
does not even show up in cachemgr as "in-transit" objects, so it may be
quite hard to locate the request, but it is visible in the
filedescriptor table.

Henrik Nordstrom
Squid hacker
Received on Mon Oct 18 1999 - 17:51:08 MDT

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