I spent couple weeks playing with 3.2.1 and found that it performs very well with active checks (6500+ in 5 min at 1-2 sec latency max) but could not pass 5000 passive checks on the master server. <br><br>When switched to 3.2.0, it processes 7300-7500 passive checks out of 8055 at 0.2 sec latency using directives use_large_installation_tweaks=1 and child_processes_fork_twice=0.<br>