FYI Hyperthreading http://news.zdnet.co.uk/0,39020330,39237341,00.htm
"Intel had sold hyperthreading as something that gave performance
gains to
heavily threaded software. SQL Server is very thread-intensive, but it
suffers. In fact, I've never seen performance improvement on server
software
with hyperthreading enabled. We recommend customers disable it when
running
Citrix and our software on the same server."
Turning HT OFF is not the solution for everyone but has worked on
servers in
several cases that I am aware of.
David B
www.declude.com
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Matt
Sent: Friday, January 13, 2006 11:08 AM
To: Declude.JunkMail@declude.com
Subject: Re: [Declude.JunkMail] Declude v3 CPU usage and processing
speed
Quick comment about turning hyperthreading off. I posted a graph from
sometime in the last two weeks where I tested this with 2.0.6.16 and it
showed that this effectively doubled my CPU utilization. I
understand that
3.x is different, but it still launches a lot of processes such as
external
tests and virus scanners that are primarily single-threaded. I won't
dismiss the possibility of an error on my system considering how
large the
difference was for the worse, but I haven't seen any claims that
turning off
hyperthreading produced an improvement yet, though on other
applications I
have definitely seen benchmarks that show measurable improvements in
some
cases.
Matt
David Barker wrote:
1. Set THREADS 200
2. Which virus scanner are you running ? and do you have PRESCAN ON
in your
virus.cfg
3. Try turning hyperthreading off.
4. Set WAITFORMAIL 500
5. Have you had DNS issues with decludeproc running ? Disable
WINSOCKCLEANUP
ON
6. Disable WAITFORTHREADS and WAITBETWEENTHREADS
Let me know.
David B
www.declude.com
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Markus
Gufler
Sent: Friday, January 13, 2006 10:11 AM
To: Declude.JunkMail@declude.com
Subject: RE: [Declude.JunkMail] Declude v3 CPU usage and processing
speed
I have worked with customers with similar Dual-Xeon CPU
setup and have seen processing of 1000+ emails per minute.
We have two of this machines here. It has exactly the same config
from the
screw who hold the server in the rack up to each dot in the junkmail
config
file (except the license codes ;-)
The first server seems processing messages faster then the second.
On the second server the more I play with values the lower CPU-usage
and
processing goes. After each reboot of decludeproc it's going down a
little
bit. Neither a reboot solved the problem. When I block incomming
SMTP-traffic on the second server it will process around 50 messages
per
minute by showing up an average CPU usage way below of 50%
(currently 20%)
1. What is your THREADS in the Declude.cfg ?
Everything from 5 up to 500
2. Are you running many large filters ?
I've tried enabling und disabling many filters without any
noticeable
change. But large filters should create a large cpu-usage.
3. How many virus scanners are you running ?
Usualy two but I've also disabled the second for testing without any
result
4. Is hyperthreading turned ON or OFF ?
Yes task manager is showing up 4 cpu's
5. Are you using any other Directives in your declude.cfg ?
Beside THREADS I've currently in use
WAITFORMAIL 5000
WINSOCKCLEANUP ON
I've tried changing WAITFORMAIL up to 15000 ms as suggested by
another v3
Admin and I've also tried adding
WAITFORTHREADS 1500
WAITBETWEENTHREADS 1
With values from 150 .. 1500 and 1 .. 1000 without any noticeable
change in
the task manager cpu usage.
The number of queue files in the proc folder is going up and down
(something
between 1000 and 12000 files) The server is working and delivery
messages
but only with 50% of his power and speed.
Netstat is showing around 100 ETSABLISHED connections and around 50
in
TIME_WAIT The process list in the task manager is showing up around
50
entries
Markus
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