Oracle Solaris DTrace is a comprehensive dynamic telemetry facility that is built into Oracle Solaris
and can be used by administrators and developers to examine the behavior of both user programs and
of the operating system itself. With Oracle Solaris DTrace you can explore your system to understand
how it works, track down performance problems across many layers of software, or locate the cause of
aberrant behavior. It is safe to use on production systems and does not require restarting either the
system or applications.