[squid-users] Re: wildcard purges /esi notes

From: Gabriel Wicke <groups@dont-contact.us>
Date: Wed, 28 Jan 2004 12:38:11 +0100

On Tue, 27 Jan 2004 23:47:49 +0100, Henrik Nordstrom wrote:

> See the purge script (Related Software)
> Not very efficient. Would be more efficient to monitor store.log and keep
> a database on what URLs there is in the cache (and in which objects).

Thanks for the pointer. I have no C++ experience so far, this might be an
opportunity to learn some (at some stage ;-).

Some notes on ESI (based on playing with it for an hour): if you have
trouble to get your ESI-enabled content cached, make shure your
Surrogate-Control header looks like this:

Surrogate-Control: max-age=60+60, content="ESI/1.0"

The '60+60' looks strange, but it's not at all (see
http://www.esi.org/architecture_spec_1-0.html#s2-2-3). Performance drops a
bit with ESI: about 600/s without ESI vs. 130/s with four unconditional
includes on my small laptop. Note that the ESI number is without
compression, 600/s would be hard to reach without.

Gabriel Wicke
Received on Wed Jan 28 2004 - 04:38:15 MST

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