Date: Mon, 15 Mar 2004 17:16:52 -0600 From: "adp" <dap99@i-55.com> To: <questions@freebsd.org> Subject: Tuning a system.. Message-ID: <001701c40ae3$a4b1dbb0$4b0a000a@yourqqh4336axf>
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We have a pretty high load mail server that does AV and spam filtering. I am
looking to perf. tune this machine. It's FreeBSD 4.9-REL and Postfix. I am
trying to correlate the info in systat to things I need to worry about. I am
using systat with vmstat output since that seems to basically show
everything you need to see. By the way, I did read 'man tuning'.
First, I see that my memory is fine:
3 users Load 9.75 4.46 3.24 Mar 15 17:02
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 106712 8704 3036376 30772 35356 count
All 502468 37816 3878800 181488 pages
The major thing I'm looking at is SWAP PAGER:
SWAP PAGER
in out
I see that I have processes in the run state and 14 waiting on the disk:
Proc:r p d s w Csw Trp Sys Int Sof Flt
8 14 77 6305 297429015 950 1863 2293
I have 77 processes sleeping.
I have 0 processes in w state, which means that my CPU isn't having a
problem.
I am spending a lot of time in sys and the rest in user:
49.5%Sys 1.7%Intr 44.5%User 0.0%Nice 4.4%Idl
Here are my disks:
Disks aacd0 acd0
KB/t 13.19 0.00
tps 111 0
MB/s 1.43 0.00
% busy 2 0
>From %Sys I would say that disk is a problem for us. However, I'm having
problems really understanding the numbers for Disks. We are running the
server on RAID-1 (2 disks) IDE. What should I be looking for here?
Here is the right side:
2626 cow 867 total
106472 wire ata0 irq14
147376 act 464 bge0 irq11
222104 inact 110 aac0 irq7
28304 cache atkbd0 irq
6992 free 100 clk irq0
daefr 128 rtc irq8
2841 prcfr
react
pdwake
pdpgs
intrn
62032 buf
508 dirtybuf
40239 desiredvnodes
38005 numvnodes
13105 freevnodes
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