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Date:      Mon, 8 Dec 2008 12:38:23 +0100 (CET)
From:      Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To:        Uwe Laverenz <uwe@laverenz.de>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Performance benchmarks pitting FreeBSD against Windows
Message-ID:  <20081208123800.I70518@wojtek.tensor.gdynia.pl>
In-Reply-To: <493CA2D6.80308@laverenz.de>
References:  <0016e64ca7d690e38f045d45227d@google.com> <ghb2qd$ij6$1@ger.gmane.org> <20081205163206.GC25258@kokopelli.hydra> <ghhidb$og3$1@ger.gmane.org> <20081208013850.R1852@wojtek.tensor.gdynia.pl> <ghhrdl$f2a$1@ger.gmane.org> <20081208034441.B65436@wojtek.tensor.gdynia.pl> <493CA2D6.80308@laverenz.de>

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>> changed it to 1MB everywhere.
>
> I've found that increasing vfs.read_max increases read performance quite a 
> bit in bonnie++ benchmarks.
>
> sysctl vfs.read_max=32

what exactly this option do?

read_max 32 <what?>

UFS blocks? MAXPHYS blocks?



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