Visualizing System Latency 68
ChelleChelle writes "Latency has a direct impact on performance — thus, in order to identify performance issues it is absolutely essential to understand latency. With the introduction of DTrace it is now possible to measure latency at arbitrary points; the problem, however, is how to visually present this data in an effective manner. Toward this end, heat maps can be a powerful tool. When I/O latency is presented as a visual heat map, some intriguing and beautiful patterns can emerge. These patterns provide insight into how a system is actually performing and what kinds of latency end-user applications experience."
Re:another solution to an already solved problem.. (Score:1, Informative)
How bout you RTFA before you make you're smartass comments, since yours is almost a direct fucking quote from it. However, this isn't about measuring network latency, it's about disk latency, something that until recently was extraordinarily hard to measure.
Re:The sky is falling... (Score:3, Informative)