On 09/13/2010 12:41 PM, Paras pradhan wrote:
John,
I am testing to support 300 requests / second. concurrent parameter in
ab does test number of Established tcp session per second if I am not
mistaken.
Thanks
Paras.
Sorry again, Paras. This time I erred in two ways: I said you were
testing at *300* /connections/ per second. Actually, your -c parameter
is 100 so you are testing at *100* /concurrent requests/ (not requests
per second; the actual number of requests per second is probably far
higher).
Suggestions:
* Post your complete ab results back here
* You might want to run your test against a (non-encrypted) http url
(as well as the encrypted https url you are using) to see to see
if the encryption process is a significant part of the processing
time. (I'm guessing it will be.)
FWIW, I'm posting my own ab results below. I ran ab from my desktop
against a simple login screen on a webserver running on a dual-core
laptop on the same local network using a command of "ab -t 10 -c 30
http://192.168.1.3/Login.html";. As you can see, I was actually
completing 573 requests per second!:
# ab -t 10 -c 30 http://192.168.1.3/Login.html
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 192.168.1.3 (be patient)
Completed 5000 requests
Finished 5734 requests
Server Software: Apache/2.2.12
Server Hostname: 192.168.1.3
Server Port: 80
Document Path: /Login.html
Document Length: 2409 bytes
Concurrency Level: 30
Time taken for tests: 10.002 seconds
Complete requests: 5734
Failed requests: 0
Write errors: 0
Total transferred: 16439378 bytes
HTML transferred: 13813206 bytes
Requests per second: 573.30 [#/sec] (mean)
Time per request: 52.328 [ms] (mean)
Time per request: 1.744 [ms] (mean, across all concurrent requests)
Transfer rate: 1605.14 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.4 0 7
Processing: 4 50 68.6 41 1918
Waiting: 3 49 68.4 41 1918
Total: 4 50 68.6 42 1919
Percentage of the requests served within a certain time (ms)
50% 42
66% 46
75% 50
80% 53
90% 81
95% 120
98% 180
99% 282
100% 1919 (longest request)
#
I hope this helps. (And thanks for introducing me to ab!)
John
On Fri, Sep 10, 2010 at 5:34 PM, John List <johnl...@gulfbridge.net
<mailto:johnl...@gulfbridge.net>> wrote:
On 09/10/2010 06:09 PM, Paras pradhan wrote:
On Fri, Sep 10, 2010 at 4:58 PM, John List
<johnl...@gulfbridge.net <mailto:johnl...@gulfbridge.net>> wrote:
Which processes are using the processors the most? (I suspect
your imap server might be more responsible than apache.)
John Hicks
True . But I am only hitting the login.php page from ab to benchmark.
Thanks
Paras.
(Pardon me for not reading your op more carefully.)
I am not familiar with ab, but after a quick read, I have one
observation:
You say you are building a system to support 200+ concurrent users
on horde. I assume that means 200 users concurrently running horde
and therefore checking their inbox every minute or so. That would
be about *3.3 requests per second*.
It looks to me like your ab test is testing at *300.0 connections*
*per second*.
In other words, perhaps you needn't be too concerned about
sluggish performance from the ab test.
John Hicks
On 09/08/2010 03:42 PM, Paras pradhan wrote:
Hi,
Looking for recommendations.
I need to serve 100-200+ concurrent users to provide php
based webmail client (horde). I have setup memcached and
php-fastcgid for this purpose. The server has four 2.2G
AMD optereon cores with 8GB of memory. I am doing stress
test using ab as: ab -t 36000 -c 100
https://url/h/imp/login.php. What I have noticed if the
number of concurrent users are more than around 25, I get
the sluggish performance and I can see linux load rising
high to 25 to 30 and all the cpu cores are approximately
75% used.
This is what I have in config files:
mpm worker:
--
<IfModule worker.c>
StartServers 15
MaxClients 960
MinSpareThreads 75
MaxSpareThreads 150
ThreadsPerChild 64
MaxRequestsPerChild 5000
--
memcached: 4GB
---
fcgid:
<IfModule !mod_fastcgi.c>
AddHandler fcgid-script .fcgi
MaxRequestsPerProcess 10000
MaxProcessCount 100
IPCCommTimeout 240
IdleTimeout 240
ProcessLifeTime 300
BusyTimeout 300
DefaultMaxClassProcessCount 100
DefaultMinClassProcessCount 50
</IfModule>
---
php-fcgid:
# Number of PHP childs that will be launched. Leave
undefined to let PHP decide.
# DefaultInitEnv PHP_FCGI_CHILDREN 4
# Maximum requests before a process is stopped and a
new one is launched
DefaultInitEnv PHP_FCGI_MAX_REQUESTS 10000
----
OS: RHEL 5.5
Apache: 2.2.3
PHP: 5.1
Mysql: 5.0
Will appreciate for any inputs.
Thanks!
Paras.
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