Good morning.
I recently upgraded our two email gateways from 4.8 to 6.2. The required
software was upgraded as well which consists of MailScanner and
Sendmail. Both had been keep up to date so it was not a jump in required
resources.
The issue I am seeing is that my server load, under the same traffic
load, has increased 4 times or more. Where previously we saw a high load
on the servers of 5 to 8, we are now seeing 14 to 17. Since the upgrade
Sendmail has begun to timeout connections.
I have been digging through the system, mail lists, forums, anything to
help determine the cause of the increased load. Here are some examples
of what I am seeing.
bash-2.05b# vmstat -w2
procs memory page disks faults cpu
r b w avm fre flt re pi po fr sr da0 da1 in sy cs us
sy id
12 5 0 2234516 199864 772 4 0 4 431 447 0 0 485 564 927 29
4 67
11 6 0 2229788 181352 8631 0 0 0 5597 0 0 0 294 2592 1236
45 5 50
9 5 0 2227208 168144 6456 0 0 0 4607 0 2 0 278 1333 898
46 4 50
11 5 0 2229068 175868 5164 0 0 0 5423 0 0 0 212 766 541 47
3 50
14 7 0 1948392 236296 8136 0 0 0 12382 0 14 0 368 4135 1504
42 8 50
4 3 2 1744620 321024 7550 0 0 0 13454 0 23 6 752 11417
3919 42 8 50
12 5 0 1951788 258944 12490 0 0 0 11295 0 0 5 727 18566
4844 40 10 50
16 6 0 2155668 214324 8231 0 0 0 4230 0 1 29 724 15531 4381
41 9 50
8 6 1 2044828 242084 4567 0 0 0 9119 0 0 12 774 12196 3225
43 7 50
bash-2.05b# top
last pid: 85205; load averages: 12.89, 13.78, 14.66
up
47+15:51:31 15:20:01
126 processes: 12 running, 79 sleeping, 35 zombie
CPU states: 43.8% user, 0.0% nice, 6.3% system, 0.0% interrupt, 50.0%
idle
Mem: 1008M Active, 582M Inact, 211M Wired, 78M Cache, 112M Buf, 122M Free
Swap: 4096M Total, 304M Used, 3792M Free, 7% Inuse
I am suspicious of the kernel being the culprit because the system looks
as if it is not working very hard, CPU load never shows above 50% idle.
I found one thread which mentions that as an issue and offers a patch.
http://lists.freebsd.org/pipermail/freebsd-bugs/2007-February/022526.html
Currently I am running the SMP-GENERIC kernel and sysctl shows the
following.
hw.model: Intel(R) Xeon(TM) CPU 2.40GHz
machdep.hlt_logical_cpus: 0
machdep.hyperthreading_allowed: 0
kern.smp.cpus: 4
I see dev.cpu.0 through dev.cpu.3
Can anyone offer a solution? Is this a known issue I can easily correct?
At this point I am left with either rolling back to 4.11 or trying
another OS.
I am thinking I have missed something obvious and I need to make a
sysctl change to get the system working properly. Any help is
appreciated, I'm losing mail.
Thanks,
Dave
--
In 50 years, our descendants will look back on the early years
of the internet, and much like we now look back on men with
rockets on their back and feathers glued to their arms, marvel
that we had the intelligence to wipe the drool from our chins.
_______________________________________________
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
