Michal Glowacki [http://community.jboss.org/people/mglowacki] created the discussion "Better single machine or cluster?" To view the discussion, visit: http://community.jboss.org/message/622095#622095 -------------------------------------------------------------- hi,      I would like to get your opinion. I have web application with EJB3 usage which is getting more and more visitors. I need to start thinking about upgrading the hardware. Currently it's 2 machines, one for Apache + JBoss 5.1, 8 cores 2,4GHz with 16GB RAM and execatly same for Postgres 9. Both working as virtual machines.      Now, my question is, what is better, buy a better machine, like with 16 or 32 cores for JBoss, or better to create one more virtual machine and create cluster? When I review logs I see a some blocked threads waiting for various resources and I got the feeling, that increasing CPUs can grow that bigger and performance gain will not be as expected.      What you think? Regards, Michal -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/622095#622095] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]