Thanks for your timely reply Henrick.
1. I increased the size as mentioned by you in loadUI.bat and currently it looks like this :
set JAVA_OPTS=-Xms128m -Xmx2048m -XX:MaxPermSize=256m
I then ran the .bat file but it did not start loaduI. I had to instead start LoadUI via the normal route, using the .exe file.
I tried stimulating my scenario but it again hanged at 600 odd requests. Not sure what is the issue here :/
2. Thanks for the insight on this. As i can see, the big time differences can only be due to network latency, will try to run it via different networks.
Thanks,
Amit