Thanks Temil. I tried it again but it's still in the same place. Just to be clear, the SoapUI GUI appears to show 300 threads running but when I check on the command line that's not the case:
[oracle@tgen01 ~]$ ps -ef | grep soapui
oracle 20809 2775 0 19:59 pts/0 00:00:00 /bin/sh ./soapui-pro.sh
oracle 20813 20809 41 19:59 pts/0 00:46:20 /home/oracle/SmartBear/SoapUI-Pro-4.6.4/jre/bin/java -Xms3072m -Xmx3072m -XX:PermSize=512m -XX:+UseParallelGC -Dsoapui.properties=soapui.properties -Dgroovy.source.encoding=iso-8859-1 -Dsoapui.home=/home/oracle/SmartBear/SoapUI-Pro-4.6.4/bin -splash:soapui-pro-splash.png -Dsoapui.ext.libraries=/home/oracle/SmartBear/SoapUI-Pro-4.6.4/bin/ext -Dsoapui.ext.listeners=/home/oracle/SmartBear/SoapUI-Pro-4.6.4/bin/listeners -Dsoapui.ext.actions=/home/oracle/SmartBear/SoapUI-Pro-4.6.4/bin/actions -Djava.library.path=/home/oracle/SmartBear/SoapUI-Pro-4.6.4/bin -Dwsi.dir=/home/oracle/SmartBear/SoapUI-Pro-4.6.4/wsi-test-tools -cp /home/oracle/SmartBear/SoapUI-Pro-4.6.4/bin/soapui-pro-4.6.4.jar:/home/oracle/SmartBear/SoapUI-Pro-4.6.4/lib/* com.eviware.soapui.SoapUIPro
oracle 23350 22919 0 21:50 pts/7 00:00:00 grep soapui
[oracle@tgen01 ~]$ ps uH p 20813 | wc -l
237
Thanks