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The netem kernel module, controlled by iproute. You need to compile Netem with the kernel: Networking --> Networking Options --> QoS and/or fair queuing --> Network emulator Once the netem module loaded, iproute's tc allows you things like: tc qdisc add dev tap0 root netem delay 50ms loss 50% (50 % packet loss, extra delay of 50 ms)


Probably your best chance will be something like http://bloke.org/apache/limit-apache-requests-per-ip-address-with-mod_limitipconn/ Also, since you are using ajp, I am going to assume that you are front ending tomcat. Another technique that my help is using an Async Servlet - https://plumbr.eu/blog/how-to-use-asynchronous-servlets-to-improve-performance


A possible solution can be using iproute2 htb. see this for an idea: http://luxik.cdi.cz/~devik/qos/htb/manual/userg.htm

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