Le 8/9/12 7:23 PM, Antonio Rodriges a écrit :
Maybe check the CPU load on your server machine and/or run a (java)
profiler.
Except the "unusual" buffer size you have chosen (maybe you have a good
reason for that?!), I don't see any issues.
I don't think that the chosen buffer size are "unusual". If you are going to
transfer large amount of data, this is quite sane to use large buffers.That
being said, it all depends on what you do when you process an incoming
message.
Also check that the pb is not on your injector : are you sending enough
message to saturate your server ?
When the client receives the incoming message it issues new server
query.
Not sure that I understand what does your client and what does your
server here. Can you be a bit more explicit ? For instance :
- is your client just sending messages, and wait for a response ?
- is your client using MINA or a simple blocking IO ?
- is your server using MINA (I'm assuming that it does, but just for
clarity) ?
- what exactly do the server ? Is it processing the message in any way
(like waiting for a third tier like a database ) ?
We have currently 3 sizes of messages, the biggest one is 1 MB.
What kind of messages are they ? Are you doing something "special" with
them on the server ?
The
CPU is surely not loaded. Munin live statistics shows not more than
400K output traffic per 0.5 sec. from the server.
That's clearly awfully slow.
We ran some tests on
our network and they showed about 500 Mb/sec mean speed. Thus, the
network is not saturated with our server
You bet !
Also it is interesting that when we increase the buffer size the
number of MESSAGE_RECEIVED events does not noticably changes at client
or speed increases.
Also check that the pb is not on your injector : are you sending enough
message to saturate your server ?
What do you mean by "pb" and "injector"?
pb = problem
Injector = the client used to send requests to the server.
At some point, if your client is waiting for a response from the server,
and if it takes time to receive these responses, then it's likely that
the throughput will be low.
Let's do some math here. You have a 1Gb/s network, let's say the average
message is 1 Mb. It will take roughly 1Mb*10/1Gb second to send a
message from a client to a server, around 10 ms. In order to saturate
your bandwith, you will need to use 100 clients sending 1Mb messages
every second.
If you just use one client, then it will be able to send 100 message per
second, max. Probably less, if the server do some processing. For
instance, if your server takes 100ms to process a single message, then
with one client, you will only be able to process around 9 messages per
second, max.
As I have no idea what your server does, it's really difficult to know
where exactly to dig to find a solution. You need to tell us more here.
--
Regards,
Cordialement,
Emmanuel Lécharny
www.iktek.com
