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From Rainer Jung <>
Subject Re: R: Newer version of mod_jk much slower than 1.2.13
Date Fri, 22 Aug 2008 12:21:29 GMT
> I get rid of the balancer and set in apache configuration file:
>         JkMount /eltbinj/* ajp13w_01_01
> With the 1.2.13 the result is obviously the same high speed (I unset the lang for not
italian (lucky) people):
> 13:13:00 (630.19 KB/s) - `/dev/null' saved [53048]
> With the 1.2.26 the result is the same:
> 13:14:53 (7.35 KB/s) - `/dev/null' saved [53048]
> So in conclusion, it is not a matter of load balancer.

Thanks for helping narrowing it down, also the information about it only 
happening for dynamic content is interesting (maybe it has to do with 
chunked encoding).

I could analyze the packet flow between Apache and Tomcat. If you set 
JkLogLevel to trace (and if trace doesn't exist for 1.2.13 to debug 
there), you get very long log output. If you do the wget test once with 
each version and with the increased log level, I could have a look at 
those log files. They will contain a full packet dump of the 
communication and at least for 1.2.26 millisecond timestamps.

Nevertheless I'm still curious about your JK directives for Apache. I 
guess JkMount is not everything ;)



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