I used to work on Solaris 10 , which has DTRACE far best troubleshooting utillity.
Had a chance to talk with first DTrace user Jarod Jenson.So if you need any help I am sure he will give you some hint..
Since Oracle is “forcing” Linux , in my new job guess what … I am running Linux and of course once a while you will run into some problem but DTrace is not there ….
but Systemtap is promissing…
SystemTap provides free software (GPL) infrastructure to simplify the gathering of information about the running Linux system.
Here is official page:
also there is good link from Oracle Open World 2007