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From: Ivan Voras <ivoras@FreeBSD.org>
Date: Sat, 7 Aug 2010 18:30:10 +0000 (UTC)
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Subject: cvs commit: src/sys/kern vfs_cluster.c
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ivoras      2010-08-07 18:30:10 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             vfs_cluster.c 
  Log:
  SVN rev 211031 on 2010-08-07 18:30:10Z by ivoras
  
  To help with sequential read UFS performance on modern systems, increase
  the vfs.read_max default. For most systems this means going from 128 KiB
  to 256 KiB, which is still very conservative and lower than what most
  other operating systems use, but as a sane default should not
  interfere much with existing systems.
  
  For systems with RAID volumes and/or virtualization envirnments, where
  read performance is very important, increasing this sysctl tunable to 32
  or even more will demonstratively yield additional performance benefits.
  
  If MAXPHYS ever gets bumped up, it will probably be a good idea to slave
  read_max to it.
  
  Revision  Changes    Path
  1.181     +1 -1      src/sys/kern/vfs_cluster.c