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|Oracle Solaris Dynamic Tracing Guide Oracle Solaris 11 Information Library|
DTrace is a comprehensive dynamic tracing facility that is built into Oracle Solaris that can be used by administrators and developers on live production systems to examine the behavior of both user programs and of the operating system itself. DTrace enables you to explore your system to understand how it works, track down performance problems across many layers of software, or locate the cause of aberrant behavior. DTrace lets you create your own custom programs to dynamically instrument the system and provide immediate, concise answers to arbitrary questions you can formulate using the DTrace D programming language.