Date: Tue, 15 Feb 2005 23:34:21 +0100 From: Borja Marcos <borjamar@sarenet.es> To: Bosko Milekic <bosko.milekic@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: MBUF statistics Message-ID: <ce99ff480e0189eec1c5333e839690fe@sarenet.es> In-Reply-To: <bbebbd3d0502151427b11c3d3@mail.gmail.com> References: <02266ed294653cda2452e7ac0a713c2c@sarenet.es> <200502151655.09800.max@love2party.net> <bbebbd3d0502151427b11c3d3@mail.gmail.com>
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> needs to be changed to accomodate this structure, but in addition to > that a way to make statistics gathering cheaper would be nice, because > currently doing a 'vmstat -z' is really terrible for performance. > Which reminds me... those of you doing benchmarks, please don't run > 'vmstat -z' while you're doing them, it might skew/pessimize your > results. I'm reading them from a C program with sysctl() and right now it doesn't seem to eat a lot. Regarding precision, the most useful aspect of these statistics is the historic view, and a rough view is enough to spot sudden changes and trends. Borja.
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