Not completely, but "tusc" or "truss" should get you a bunch of trace info on HPUX. Very similar to "strace" on other platforms, not to be confused with the "strace" on HPUX, which is a STREAMS thing. HTH! GL! Rich -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Allen, Brandon Sent: Tuesday, February 21, 2006 2:28 PM To: john.kanagaraj@xxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: RE: A good OS centric discussion on performance Yep, good article. Is anyone aware of anything similar to Solaris' DTrace for HPUX or AIX?