Hi TOG, Does anyone have suggestions on a mod/application for in-depth analysis of server side chunk / lag /performance issues? One that came recommended was Opis but it appears to have several issues with 1.6.4 (ie: does not work and prevents server start). Suggestions? End goal is to fire up my small SMP world and find out what's causing our block lag; we're only five players in a reasonably spread out area with minimal gear. Shouldn't have such huge issues. Thanks in advance.