Most provisions for dynamic tunability (such as setting a debug mode) can seriously impact time efficiency by adding levels of indirection and increasing Numbers of branches.
Dynamic xmalloc debug (XMDBG) : This feature improves system reliability by improving the overall diagnostics capabilities of the allocation of memory.
Dtrace, the dynamic tracing facility introduced in Solaris 10, provides a debugging tool to debug the problems that are difficult to diagnose using traditional problem determination mechanisms.
D trace是在Solaris 10中引入的动态跟踪工具，这种调试工具可以调试用传统的问题判断机制难以诊断的问题。