Please help using MINA in a large mission critical project

[Kumaran Arul <AK...@woolworths.com.au>]

Hi

Any hints will be really appreciated.  I am using MINA 1.1.0 and carrying out some performance tests.


When I run the client and the server on the same machine it performs lot better than having both the client and the server on separate machines?


Also if I hit the server with 100 concurrent requests straight away it stalls with 100% CPU utilization. But if I send a first single request and subsequently send 100 concurrent requests it works fine.

My code is show below. Any recommendations or suggestions will be greatly appreciated.



Thanks
ak


P PLEASE CONSIDER THE ENVIRONMENT BEFORE YOU PRINT THIS E-MAIL

>  -----Original Message-----
> From: 	Kumaran Arul  
> Sent:	Tuesday, 24 April 2007 6:32 PM
> To:	'dev@mina.apache.org'
> Subject:	CPU usage 100%
> Importance:	High
> 
> 
> Hi
> 
> I am using MINA 1.1.0 and works well in Windows environment when I use 200 concurrent requests. Takes 0.45ms per request.
> 
> 
> But when I deployed my application to the HP UX machine it runs fast for first 100 requests and the CPU gets to 100% and slows the whole application down drastically (i.e. 30 seconds a request). Any suggestions will be greatly appreciated.
> 
> 
> I am running with 15-25 worker threads 
> and IOThreads = number of CPUs
> 
> 
> Sample code  below:
> 
>             ExecutorService ioExecutor = Executors.newFixedThreadPool(noOfIoThreads + 1);
> 
> 		ExecutorService serviceExecutor = Executors.newFixedThreadPool(noOfWorkerThreads);
> 
> 		IoAcceptor acceptor = new SocketAcceptor(noOfIoThreads, ioExecutor);
> 		SocketAcceptorConfig config = new SocketAcceptorConfig();
> 
> 		config.setThreadModel(ThreadModel.MANUAL);
> 		config.getSessionConfig().setTcpNoDelay(false);
> 		config.getSessionConfig().setReuseAddress(true);
> 		
> 		DefaultIoFilterChainBuilder chain = config.getFilterChain();
> 		addLogger(chain);
> 		// config.getFilterChain().addLast("compression", new CompressionFilter());
> 		config.getFilterChain().addLast("threadPool", new ExecutorFilter(serviceExecutor));
> 		
> 		SocketAddress sa = null;
> 
> 		try {
> 			sa = new InetSocketAddress(portNo);
> 			//
> 			
> 			//Bind
> 			acceptor.bind(sa, new PayAtPumpTxnHandler(), config);
> 		}
> 
> 		catch (IOException ioe) {
> 			acceptor.unbind(sa);
> 			serviceExecutor.shutdown();
> 			ioExecutor.shutdown();
> 			throw new RuntimeException("Error starting the listener " + listenerName + " on host=" + ((InetSocketAddress)sa).getHostName() +   " on port number=" + portNo + ioe);
> 		}
> 
> 		finally {
> 			logger.info("Listener " + listenerName + " started on host=" +  ((InetSocketAddress)sa).getHostName() +   " port number=" + portNo);
> 		}
> 
> 
> 
> 
> 
> P PLEASE CONSIDER THE ENVIRONMENT BEFORE YOU PRINT THIS E-MAIL
> 

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Re: Please help using MINA in a large mission critical project

[peter royal <pr...@apache.org>]

On Apr 27, 2007, at 3:41 AM, Kumaran Arul wrote:
> When I run the client and the server on the same machine it  
> performs lot better than having both the client and the server on  
> separate machines?

sure, since the OS is probably smart enough to realize its a local  
socket connection and optimize things. There's no network involved! :)

> Also if I hit the server with 100 concurrent requests straight away  
> it stalls with 100% CPU utilization. But if I send a first single  
> request and subsequently send 100 concurrent requests it works fine.

This is starting "cold"?

When performance testing java projects, its critical to provide a  
"warm up" period to allow the JVM to have a chance to load and  
initialize all code, as well as optimize the bytecodes (by converting  
to native code in most cases)

> My code is show below. Any recommendations or suggestions will be  
> greatly appreciated.

It looks okay at first blush.

-pete



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