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From Cédric Couralet <>
Subject Re: What is the best connector configuration for thousands of mostly idle users?
Date Tue, 11 Feb 2014 05:28:26 GMT
2014-02-10 22:34 GMT+01:00 André Warnier <>:

> Jesse Barnum wrote:
>> On Feb 10, 2014, at 11:14 AM, Filip Hanik <> wrote:
>>  Jesse, mostly idle users and you wish to conserve resources. Use the
>>> JkOptions +DisableReuse
>>> on the mod_jk module. This will close connections after the request has
>>> been completed. Many will tell you this will slow down your system since
>>> new connections have to be created for each request. Usually, the
>>> overhead
>>> of this connection creation on a LAN is worth it. Measure for yourself.
>>> Then you can go back to the regular blocking AJP connector, that will
>>> perform a bit better as it doesn't have to do polling.
>> If I do this, can I keep a long keep-alive time on Apache? I need to
>> preserve that, because renegotiating SSL connections for every request
>> grinds the web server to a halt.
>> Also, I thought mod_jk and mod_ajp were two different things - how can I
>> use them both together?
> Reply to the last phrase above :
> mod_jk and mod_proxy_ajp are indeed two different things, but with a
> similar purpose :
> - each of them is a different add-on module to Apache httpd
> - each one of them can be used as a connector between Apache httpd and
> Apache Tomcat
> - you generally use one or the other, not both at the same time
> - they both connect to the same AJP <Connector> at the Tomcat level
> - between Apache httpd and Tomcat, they both "speak the same language"
> (the AJP protocol)
> One difference is that mod_jk has quite a few more tunable options than
> the mod_proxy_ajp module.  The JkOptions mentioned above by Filip is one of
> these mod_jk options.

I don't know what that JkOptions options does exactly, but from the name,
isn't it the same as the disableReuse option on mod_proxy?

Then the OP could try that.

> But I don't remember (and did not check earlier in the thread) if you
> indicated that you are using mod_proxy_ajp.
> And to answer the previous question : yes, I believe that you can keep a
> long keep-alive in Apache httpd, independently of how httpd connects to
> Tomcat.
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