diff options
Diffstat (limited to 'share/man/man4')
| -rw-r--r-- | share/man/man4/aac.4 | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/share/man/man4/aac.4 b/share/man/man4/aac.4 index 22167b9..65afac2 100644 --- a/share/man/man4/aac.4 +++ b/share/man/man4/aac.4 @@ -100,18 +100,24 @@ disk/container interface .It Pa /boot/kernel/aac.ko aac loadable module .El -.Sh TUNING +.Sh IMPLEMENTATION NOTES The read-only sysctl .Va hw.aac.iosize_max -defautls to 65536 and may be set at boot time to another value via +defaults to 65536 and may be set at boot time to another value via .Xr loader 8 . This value determines the maximum data transfer size allowed -to/from an array. Setting it higher will result in better performance, -especially for large sequential access patterns. BEWARE: internal limitations -of the card limit this value to 64K for arrays with many members. While it -may be safe to raise this value, do so AT YOUR OWN RISK. Note also that -performance peaks at a value of 96K, and drops off dramatically at 128K, due -to other limitations of the card. +to/from an array. +Setting it higher will result in better performance, +especially for large sequential access patterns. +.Em Beware : +internal limitations +of the card limit this value to 64K for arrays with many members. +While it may be safe to raise this value, this is done +.Em at the operator's own risk . +Note also that +performance peaks at a value of 96K, +and drops off dramatically at 128K, +due to other limitations of the card. .Sh DIAGNOSTICS Compiling with .Dv AAC_DEBUG |
