Paras, have you checked the OS counters ?, is this completely CPU bound ? would you post a "vmstat 2" run during the ab testing ? Regards, Pablo On Mon, Sep 13, 2010 at 7:28 PM, Paras pradhan <pradhanparas@xxxxxxxxx> wrote: > I got almost the same result as yours with a small test php script. But with > the login page of horde, I am getting a small number of requests processed. > I am assuming my tuned apache is fine and its the bulky horde php scripts > that are hitting me. But still looking around the solution.. I have > memcached and eaccelerator in place but not seeing improvements. > > With small php script: > nagarkot:~ ppradhan$ ab -t 10 -c 30 https://domain/test.php > This is ApacheBench, Version 2.3 <$Revision: 655654 $> > Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ > Licensed to The Apache Software Foundation, http://www.apache.org/ > Benchmarking hostname (be patient) > Finished 4608 requests > > Server Software: Apache/2.2.3 > Server Hostname: hostname > Server Port: 443 > SSL/TLS Protocol: TLSv1/SSLv3,AES256-SHA,1024,256 > Document Path: /test.php > Document Length: 68 bytes > Concurrency Level: 30 > Time taken for tests: 10.003 seconds > Complete requests: 4608 > Failed requests: 0 > Write errors: 0 > Total transferred: 1107432 bytes > HTML transferred: 313480 bytes > Requests per second: 460.65 [#/sec] (mean) > Time per request: 65.125 [ms] (mean) > Time per request: 2.171 [ms] (mean, across all concurrent requests) > Transfer rate: 108.11 [Kbytes/sec] received > Connection Times (ms) > min mean[+/-sd] median max > Connect: 8 30 33.3 26 406 > Processing: 5 35 21.4 32 386 > Waiting: 5 30 20.4 27 383 > Total: 20 65 40.3 59 462 > Percentage of the requests served within a certain time (ms) > 50% 59 > 66% 64 > 75% 69 > 80% 72 > 90% 81 > 95% 91 > 98% 154 > 99% 269 > 100% 462 (longest request) > > > With horde: > > -- > nagarkot:~ ppradhan$ ab -t 10 -c 30 https://domain/h/imp/login.php > 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 hostname (be patient) > Finished 28 requests > > Server Software: Apache/2.2.3 > Server Hostname: hostname > Server Port: 443 > SSL/TLS Protocol: TLSv1/SSLv3,AES256-SHA,1024,256 > Document Path: /h/imp/login.php > Document Length: 16808 bytes > Concurrency Level: 30 > Time taken for tests: 10.057 seconds > Complete requests: 28 > Failed requests: 0 > Write errors: 0 > Total transferred: 490644 bytes > HTML transferred: 470624 bytes > Requests per second: 2.78 [#/sec] (mean) > Time per request: 10775.575 [ms] (mean) > Time per request: 359.186 [ms] (mean, across all concurrent requests) > Transfer rate: 47.64 [Kbytes/sec] received > Connection Times (ms) > min mean[+/-sd] median max > Connect: 9 213 220.9 269 867 > Processing: 660 3935 2707.5 3242 9787 > Waiting: 659 3934 2707.5 3241 9785 > Total: 926 4148 2762.9 3314 10056 > Percentage of the requests served within a certain time (ms) > 50% 3314 > 66% 4803 > 75% 6077 > 80% 6369 > 90% 8963 > 95% 9699 > 98% 10056 > 99% 10056 > 100% 10056 (longest request) > > > Thanks! > Paras. > On Mon, Sep 13, 2010 at 1:33 PM, John List <johnlist@xxxxxxxxxxxxxx> wrote: >> >> 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 <johnlist@xxxxxxxxxxxxxx> >> wrote: >>> >>> On 09/10/2010 06:09 PM, Paras pradhan wrote: >>> >>> On Fri, Sep 10, 2010 at 4:58 PM, John List <johnlist@xxxxxxxxxxxxxx> >>> 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. >>>>> >>>> >>>> >>>> --------------------------------------------------------------------- >>>> The official User-To-User support forum of the Apache HTTP Server >>>> Project. >>>> See <URL:http://httpd.apache.org/userslist.html> for more info. >>>> To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx >>>> " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx >>>> For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx >>>> >>> >>> >> >> > > --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. 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