I made some mistakes on my former example. Sorry. Let me post new result
when done. Thanks.
2008/4/2 Steve Johns <[EMAIL PROTECTED]>:
> Thank you very much.
>
> 1) I used Mina1.1.5 NOT 2.0 M1.
> 2) Actually telnet client is on the same machine as my Mina server. Could
> it be SLOW?
>
> In order to test how fast Mina could write, I modified the
> ReverseProtocolHandler example. I added following code in the
> ReverseProtocolHandler:
>
> public void sessionCreated(IoSession session) throws Exception {
> String message =
> "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
>
> while (true) {
> for (int i = 0; i < 5000; i++)
> session.write(message);
>
> Thread.sleep(500);
> }
> }
>
> and I opened a telnet client connect to it. However, when I
> PrintGCDetails, i obversed that GC is so busy to collect (take 0.15 sec to
> collect once, and keep collecting )and after a while it seems too slow to
> collect. Eventually OOM.
>
> I don't know if my code added was correct or NOT. I was impressed when you
> said your server could handle 140k message/sec. How could you possible do
> that? ^^
> On Wed, Apr 2, 2008 at 11:30 AM, "이희승 (Trustin Lee) <[EMAIL PROTECTED]>
> wrote:
>
> > Hi Steve,
> >
> > OOM can be raised when the write request rate is so high. There are two
> > possible issues:
> >
> > 1) MINA NioProcessor is writing slowly.
> > 2) Receiving party (i.e. telnet client) is receiving slowly.
> >
> > If #1 is the case, we need to fix it. However, I was able to achieve
> > 140k messages per second for asynchronous messaging and 20k messages per
> > second for synchronous messaging in my private performance test
> > performed in gigabit network recently. Just in case your scenario is
> > triggering a hidden bug in MINA, please provide us a simple test
> > application.
> >
> > HTH,
> >
> > Steve Johns wrote:
> > > So far Mina does a good job in my recent project until yesterday. I am
> > > working a GW server handling 10k - 15k incoming messages/sec with NOT
> > very
> > > big sizes and send them to clients. The weird thing is the program has
> > NO
> > > problem to consume the incoming messages(decoding, read). However,
> > when a
> > > simple telnet client connected to my server(same machine), I observed
> > the GC
> > > taking 0.5 - 1.0sec to do GC every time and eventually OOM(GC is NOT
> > > faster??). I got serveral questions:
> > > 1) just wonder if mina is able to write that many of messages? I
> > believe
> > > telnet client on the same machine NOT considered to be a SLOW client,
> > right?
> > > 2) IF 1) Yes, the problem seems GC limitation but NOT Mina problem?
> > >
> > > Thanks.
> > >
> >
> > --
> > Trustin Lee - Principal Software Engineer, JBoss, Red Hat
> > --
> > what we call human nature is actually human habit
> > --
> > http://gleamynode.net/
> >
> >
>
