Chapter 1. Introduction to Observability Tools
Bryan Cantrill’s foreword describes operating systems as “proprietary black boxes, welded shut to even the merely curious.” Bryan paints a realistic view of the not-too-distant past when only a small amount of the software stack was visible or observable. Complexity faced those attempting to understand why a system wasn’t meeting its prescribed service-level and response-time goals. The problem was that the performance analyst had to work with only a small set of hardwired performance statistics, which, ironically, were chosen some decades ago by kernel developers as a means to debug the kernel’s implementation. As a result, performance measurement and diagnosis became an art of inferencing and, in ...
Get Solaris™ Performance and Tools: DTrace and MDB Techniques for Solaris 10 and OpenSolaris now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.