tomcat 8.5.29 AJP connector setup

[Jose Torres]

Hello,

I am running with configuration below, I like to know what parameters can
be use with tomcat AJP for a H.A. configuration.




<!-- Define an AJP 1.3 Connector on port 8009 -->
<Connector port="8009" protocol="AJP/1.3" redirectPort="443"
maxThreads="4096" minSpareThreads="256"
enableLookups="false" acceptCount="100"
connectionTimeout="20000" />

[Jose Torres]

I hit enter too soon, but I want to know what other people use when
configuring tomcat AJP connector, I provided an example of what I use. I am
running following, tomcat 8.5.29 / apache 2.4.29 / mod_jk/1.2.41.

Thanks

Post by Jose Torres
Hello,
I am running with configuration below, I like to know what parameters can
be use with tomcat AJP for a H.A. configuration.
<!-- Define an AJP 1.3 Connector on port 8009 -->
<Connector port="8009" protocol="AJP/1.3" redirectPort="443"
maxThreads="4096" minSpareThreads="256"
enableLookups="false" acceptCount="100"
connectionTimeout="20000" />

[Christopher Schultz]

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Jose,

Post by Jose Torres
I hit enter too soon, but I want to know what other people use
when configuring tomcat AJP connector, I provided an example of
what I use. I am running following, tomcat 8.5.29 / apache 2.4.29 /
mod_jk/1.2.41.
Thanks

Post by Jose Torres
Hello,
I am running with configuration below, I like to know what
parameters can be use with tomcat AJP for a H.A. configuration.
<!-- Define an AJP 1.3 Connector on port 8009 --> <Connector
port="8009" protocol="AJP/1.3" redirectPort="443"
maxThreads="4096" minSpareThreads="256" enableLookups="false"
acceptCount="100" connectionTimeout="20000" />

Are you experiencing any particular problem, or are you just looking
for "general advice"?

Since you are using Tomcat 8.5 and not 6.0 or below, you probably want
to use an explicit <Executor> because you will have better control
over resource-allocations -- specifically, threads.

4096 threads is a lot of threads. Have you instrumented your
environment to see how many threads you are actually using?

If you really want "high availability" I might actually set the TCP
backlog (acceptcount) to zero. This will allow a reverse-proxy to send
traffic to a server which isn't full and clients will likely receive a
faster response.

Other than that, there really is no "configuration for H.A.". If there
were some other configuration that was better, Tomcat would ship with
it as the default.

- -chris
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