Hi Peter, Thanks for the reply. I have set the max threads to 500. But dint do anything to minSpareThreads and maxSpare threads. And in the JMX console I could see the value that I have set. But its not there in the server logs..???? Another problem is this... I have tested the performance MULE over JBoss using JMeter. I have taken the number of users as 1, 2, 10, 25, 50, 100 with loop count 2. And I have captured the results, once with 10 as thread pool size and another time with 500 pool size. Expected was that with 500 pool size, the response time should improve. But the results were very inconsistent. Following are the results: #users 1 10 25 50 100 #Loops 2 ThreadPoolSize 500 ResponseTime(sec) 0.14 0.38 0.92 2.014 4.565 And another one: #users 1 10 25 50 100 #Loops 2 ThreadPoolSize 10 ResponseTime(sec) 0.109 0.411 0.957 1.989 4.855 What is the expected behavior on increasing the thread pool size.? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4137503#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...