vinum in 4.x poor performer?

[Marc G. Fournier]

On Wed, 9 Feb 2005, Greg 'groggy' Lehey wrote:

> On Tuesday,  8 February 2005 at 23:21:54 -0400, Marc G. Fournier wrote:
>>
>> I have a Dual-Xeon server with 4G of RAM, with its primary file system
>> consisting of 4x73G SCSI drives running RAID5 using vinum ... the
>> operating system is currently FreeBSD 4.10-STABLE #1: Fri Oct 22 15:06:55
>> ADT 2004 ... swap usage is 0% (6149) ... and it performs worse then any of
>> my other servers, and I have less running on it then the other servers ...
>>
>> I also have HTT disabled on this server ... and softupdates enabled on the
>> file system ...
>>
>> That said ... am I hitting limits of software raid or is there something I
>> should be looking at as far as performance is concerned?  Maybe something
>> I have misconfigured?
>
> Based on what you've said, it's impossible to tell.  Details would be
> handy.

Like?  I'm not sure what would be useful for this one ... I just sent in 
my current drive config ... something else useful?

systat -v output help:

     4 users    Load  4.64  5.58  5.77                  Feb  9 00:24

Mem:KB    REAL            VIRTUAL                     VN PAGER  SWAP PAGER
         Tot   Share      Tot    Share    Free         in  out     in  out
Act 1904768  137288  3091620   381128  159276 count
All 3850780  221996  1078752   605460         pages
                                                      7921 zfod   Interrupts
Proc:r  p  d  s  w    Csw  Trp  Sys  Int  Sof  Flt    242 cow     681 total
     24     9282       949 8414*****  678  349 8198 566916 wire        ahd0 irq16
                                                   2527420 act      67 ahd1 irq17
54.6%Sys   0.2%Intr 45.2%User  0.0%Nice  0.0%Idl   608208 inact   157 em0 irq18
|    |    |    |    |    |    |    |    |    |     146620 cache   200 clk irq0
===========================>>>>>>>>>>>>>>>>>>>>>    12656 free    257 rtc irq8
                                                           daefr
Namei         Name-cache    Dir-cache                7363 prcfr
     Calls     hits    %     hits    %                     react
     46106    46005  100       13    0                     pdwake
                                                           pdpgs
Disks   da0   da1   da2   da3   da4 pass0 pass1           intrn
KB/t   5.32  9.50 12.52 16.00  9.00  0.00  0.00    204096 buf
tps      23     2     4     3     1     0     0      1610 dirtybuf
MB/s   0.12  0.01  0.05  0.04  0.01  0.00  0.00    512000 desiredvnodes
% busy    3     1     1     1     0     0     0    397436 numvnodes
                                                    166179 freevnodes

Drives da1 -> da4 are used on the vinum array da0 is just the system drive 
...

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email: scrappy at hub.org           Yahoo!: yscrappy              ICQ: 7615664