Date: Sat, 17 Feb 2007 14:34:11 -0600 From: Kirk Strauser <kirk@strauser.com> To: freebsd-questions@freebsd.org Subject: A bottleneck in gstripe? Message-ID: <200702171434.15077.kirk@strauser.com>
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[-- Attachment #1 --] I built a gstripe volume with 4 drives and a 128KB stripesize. When running one particular application, gstat reports that stripe/stripe1 is 99% busy, although its four drives are running at less than 30% each. Am I misinterpreting the numbers - maybe the total is the sum of the drives? - or is there some giant overhead that I'm missing? I've set kern.geom.stripe.fast=1, and kern.geom.stripe.fast_failed stays at 0. I don't have enough experience with geom_strip to even know where to go from here. Are stripe sizes likely to make much of a difference when the heaviest load is when PostgreSQL is receiving massive imports? This is a production system and I don't have the opportunity to play with it as much as I'd like, so any pointers to experiments likely to make a difference would be most welcome. -- Kirk Strauser [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iD8DBQBF12bH5sRg+Y0CpvERAi18AKCC/t+h1h7FoEZtKmADCWjjEyWDGgCfcghd gL6arVFJzsGbZkHdE8h0W6s= =MVCY -----END PGP SIGNATURE-----
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