I have a fairly standard setup where a front-end Apache server
forwards requests to Tomcat through mod_proxy/AJP. How can I setup
Apache/mod_proxy so it only forwards at most N (say, N=4) concurrent
requests to Tomcat? Other concurrent requests coming into Apache
should not be rejected, and should instead be queued to later be sent
to Tomcat.
PS 1: I know this is something you can do this at the Tomcat level
with the maxThreads attribute, but I prefer to handle this at the
Apache level.
PS 2: I see that Apache has a MaxClients configuration, which seems to
be doing what I am looking for. But it is not clear to me how to have
a MaxClient per server mod_proxy forwards to, rather than MaxClient
per Apache. I.e. if Apache forward requests to a cluster of 4 Tomcat
machine, I'd like Apache to limit the number of concurrent requests
forwarded to any given Tomcat to N (say, N=4).
Alex
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