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From "David Dabbs" <dmda...@gmail.com>
Subject RE: [users@httpd] Event MPM in httpd 2.2.x
Date Fri, 04 Feb 2011 16:23:06 GMT

Thank you Tom for sharing your event MPM experience. 
Can anyone speak to whether 2.2.17 event MPM (safely) supports SSL?
I suspect not, as only recently there was a trunk (2.3) fix to make the SSL expression parser
thread-safe.
Though this may be unrelated. If there's any doubts, we'll simply continuing using worker,
or follow your lead and use a separate httpd for SSL connections.

Best,

David



-----Original Message-----
From: Tom Evans 

On Thu, Feb 3, 2011 at 11:42 PM, David Dabbs <dmdabbs@gmail.com> wrote:
> Hello.
>
> I’m considering changing over to the event MPM, but as of 2.1.17 it is still
> marked with an “Experimental” warning in the MPM docs.
>
> Does anyone know why the experimental warning was dropped in the 2.3 (trunk)
> documentation?
> Was it somehow stabilized/made ready-for-primetime?
>

As it was explained to me 4 years ago, when we first moved to using
2.2 with event MPM, it was marked experimental at that time was only
because it could not handle SSL at all. In the trunk branch, this was
fixed so it would fall back to worker-style MPM when dealing with SSL
connections, and I think this has been backported to 2.2, although I'm
not sure, we still offload SSL to a different apache.

>
> If you’re using a 2.2.x event MPM in a production environment, would you
> mind reporting your experiences with it?
>

In a word - 'excellent'. We use apache-event as the front-end to all
our web apps, and it mainly serves static files or proxies to the
appropriate backend servers. Our sites aren't super-busy, 1-2 million
hits a day, but with event we have consistently fast connection and
throughput times, the load on the servers barely registers. We've
never had a problem with reliability or speed in the 4 years we've
been running event MPM on our front end proxies.

Cheers

Tom

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