"Nizzardini, Al" wrote: > > What are sys processes 40 and 42. Do they have anything to do with > transaction manager and dispatcher? Not XM, no. XM process numbers are rather deterministic as they get created during bootup of the system. There are 5 processes belonging to XM (at least on all currently supported releases) and they should be PINs 10..14 or 11..15. If you see other processes doing a very high number of disc IOs, but they do not show a program name, then my guess would be you are looking at io_mgr_process PINs which probably do DTC communication event logging, typically due to a hearbeat problem on your link because SQE-Test is not enabled on some of your LAN tranceivers on some of your DTCs. HTH, Götz.