Good news, everyone, in the last two weeks I've been working on a tool that could help us to profile Infinispan performance, analyze it and probably debug some stuff as well. While trace logs are the most useful, performance is impacted to almost unusable levels and it still does not provide enough information, logs have low precision etc. The idea is to analyze the behaviour based on the requests and track down the consequences of each request (put/get/whatever). Currently I have a working prototype (I believe already useful) which is able to track down all messages based on the initial request, records which threads execute etc. It's Byteman based, no trace logs/code changes required. However, according to my initial testing it reduces the overall performance 2-3 times. The code is located in https://github.com/rvansa/message-flow-tracer , please look at README for details what it can do and ping me if you have any questions/feedback. Radim PS: short demo output on http://pastebin.com/raw.php?i=SBQFuG3a ----------------------------------------------------------- Radim Vansa Quality Assurance Engineer JBoss Datagrid tel. +420532294559 ext. 62559 Red Hat Czech, s.r.o. Brno, Purkyňova 99/71, PSČ 612 45 Czech Republic