Isn't the simplest option to place a decent reverse proxy between the webserver and our clients?

For example, varnish will cache and proxy simple GETs, so simple views of the front page and docs (which I imagine is a large chunk of the traffic) will be offloaded from the webserver:
http://varnish.projects.linpro.no/wiki/VarnishFeatures

Also, is the current installation (Db, apache + trac) all on one machine or are the DB and the webserver split already?

These would be easy ways to throw more hardware at the problem.

What is the current web-server configuration?
Can you share traffic stats for the top 20 pages, so we get an idea of where the load is?

-Tom

From: "ssteinerX@gmail.com" <ssteinerx@gmail.com>
Subject: Re: [Twisted-Python] Volunteer for twisted code Reviews and
	Commits
To: Twisted general discussion <twisted-python@twistedmatrix.com>
Message-ID: <C38535FC-8267-4162-B67C-1F27822CBC8D@gmail.com>
Content-Type: text/plain; charset=us-ascii; format=flowed; delsp=yes


On Nov 7, 2009, at 8:51 AM, David Lyon wrote:

  
Hi Jean-Paul,

On Sat, 07 Nov 2009 13:32:28 -0000, exarkun@twistedmatrix.com wrote:

    
A server farm doesn't buy us anything, as trac can't be scaled up  
across
multiple hosts (or even multiple CPUs on a single host).
      
I'm surprised to hear that.

Usually replication of servers for read requests works well
with dns sharing.

Does Trac not run a database? that can go on another machine and
lighten the load.

Anyway, it's your call. Keep up the good work.
    

I think the best option may just be to collect machine, database, and  
usage stats and ask the trac guys for help.

S




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