# Question about running on multiprocessor **URL:** \ **Category:** NGINX\ **Created:** [June 21, 2013, 12:22pm UTC](https://www.ruby-forum.com/t/question-about-running-on-multiprocessor/245576 "2013-06-21T12:22:44Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Post date:** [June 21, 2013, 12:22pm UTC](https://www.ruby-forum.com/t/question-about-running-on-multiprocessor/245576/1 "2013-06-21T12:22:44Z")
Hi, I’m a beginner on this field. I want just to do some simulation about multiprocessor programming. What I’m trying to do is to test performance of nginx by using Apache Benchmark. So, I added “server.max-worker = 8” to default “nginx.conf” and ran Apache Bench through a command, “ab -n 100000 -c 1000 xxx.xxx.xx.xx”. However, server computer’s max CPU utilization showed 30% as if it had just 2 cores. Without “max-worker=8”, max CPU utilization is 15%, so it is sure that there was some change. How can I increase the CPU utilization to 100%, which is 8 core?? Followings are running environment, O/S: Ubuntu 12.04 (in VIrtualbox4.2) CPU: Intel, i7-3610QM (which has physical 4 cores, but virtually 8 cores considering hyperthreading) RAM: 4096MB nginx: 1.4.1 Apache: 2.2 notes-I checked that CPU utilization can be 100% with another application. If anyone has idea on this or needs more information about my setting, please let me know. Thanks in advance. ---
**Author:** ![SSS\_SS\_SSSSSS\_SSS](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ac8455/32.png) [@SSS\_SS\_SSSSSS\_SSS](https://www.ruby-forum.com/u/SSS_SS_SSSSSS_SSS)\ **Post date:** [June 22, 2013, 2:33pm UTC](https://www.ruby-forum.com/t/question-about-running-on-multiprocessor/245576/2 "2013-06-22T14:33:47Z")
---------- Forwarded message ---------- From: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Date: 2013/6/21 Subject: question about running on multiprocessor To: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Hi, I’m a beginner on this field. I want just to do some simulation about multiprocessor programming. What I’m trying to do is to test performance of nginx by using Apache Benchmark. So, I added “server.max-worker = 8” to default “nginx.conf” and ran Apache Bench through a command, “ab -n 100000 -c 1000 xxx.xxx.xx.xx”. However, server computer’s max CPU utilization showed 30% as if it had just 2 cores. Without “max-worker=8”, max CPU utilization is 15%, so it is sure that there was some change. How can I increase the CPU utilization to 100%, which is 8 core?? Followings are running environment, O/S: Ubuntu 12.04 (in VIrtualbox4.2) CPU: Intel, i7-3610QM (which has physical 4 cores, but virtually 8 cores considering hyperthreading) RAM: 4096MB nginx: 1.4.1 Apache: 2.2 notes-I checked that CPU utilization can be 100% with another application. ## If anyone has idea on this or needs more information about my setting, please let me know. Thanks in advance. With regards, Jason Koh ()