Hey Vinod, For some reason we are not able to go over 33K concurrent connections. I still have to figure out where the bottleneck is. Interestingly, the CPU looks fine (7%), memory fine (50% of max heap), thread dumps fine, no errors....all is fine but the system slows down up to the point of no longer working.
Do you have more info about your experience? I would like to know how you were able to establish when you hit a hardware limit, when it was a JVM-epoll limitation or whatever. In your experience, which JVM implementation was the best one (scalable) and epoll implementation/version. If you can suggest tools or commands to use to monitor our linux/solaris environments it would be great. Thanks for your help. Regards, -- Gato -----Original Message----- From: Vinod Panicker [mailto:[EMAIL PROTECTED] Sent: Friday, December 22, 2006 10:59 PM To: [email protected] Subject: Re: Limitations on open sessions? On 12/22/06, Trustin Lee <[EMAIL PROTECTED]> wrote: > On 12/22/06, Vinod Panicker <[EMAIL PROTECTED]> wrote: > > > > On 12/22/06, Michael Bauroth <[EMAIL PROTECTED]> wrote: > > > Hi Vinod, > > > > > > that's the solution! I called ulimit with the wrong parameter. ulimit -n > > > gives me 50000 as result, so now it's clear. > > > > > > Remaining my second question, but this one I will discuss in the other > > > thread so far. > > > > Rather than calling ulimit each time, just make the necessary entries > > in /etc/security/limits.conf on a Debian system. > > > > If you enter something like this - > > > > * soft nofile 100000 > > * hard nofile 100000 > > > > And reboot, all users on the system will have an open file limit of 100k > > > Hey, isn't it too big? :) > > It would be great if you managed to make MINA handle that amount of > connections in production environment. If so, please let us know! It is very much possible to handle these many connections. The limitations are currently imposed by the hardware and the JVM implementation of epoll. If you remember my earliest tests, we were able to reach 100k connected sessions using MINA. Doing I/O is another matter, though. Regards, Vinod.
