Long DTrace scripts

If you try to write/run large DTrace script you can encounter problem that DTrace won't let you run such a script. In that case you can increase dtrace_dof_maxsize which can be changed on the fly (or you can put it in /etc/system). For example:

     # ./big_script.d
     dtrace: failed to enable './big_script.d': DIF program exceeds maximum program size

     # mdb -kw
     Loading modules: [ ... ]
     > dtrace_dof_maxsize/E
     dtrace_dof_maxsize:
     dtrace_dof_maxsize:      262144
     > dtrace_dof_maxsize/Z 0t524288
     dtrace_dof_maxsize:      0x40000    =    0x80000
     > dtrace_dof_max_size/E
     dtrace_dof_maxsize:
     dtrace_dof_maxsize:      524288
     > $q

     # ./big_script.d
     dtrace: script './big_script.d' matched 264 probes