Help to analyze performance bottlenecks

stubbornchloe · 2017-12-04T13:42:17+00:00

Hiii,am using angular js as my front end php as my serverside scripting language. I want to change the server language to 'LUA'. But am a beginer...

Help to analyze performance bottlenecks

stubbornchloe

My performance test environment is as below:

Env: centos

Architecture: x86_64

CPU op-mode(s): 32-bit, 64-bit

Byte Order: Little Endian

CPU(s): 4

On-line CPU(s) list: 0-3

Thread(s) per core: 2

Core(s) per socket: 2

Configurations: worker_connections 4096, worker_processes auto, and upstream keepalive are configured to 128 and keepalive timeout to 30,

When I'm taking a performance test, nginx server CPU wasn't fully taken, just about 50% or less.

Flame graphs of both on-cpu and off-cpu is attached. Could you please help me to analyze performance bottlenecks?

Thank you so much!

Attachment: nginx_on_cpu_200.svg
Description: image/svg

Attachment: nginx_off_cpu_200.svg
Description: image/svg

peter_booth

Are you running this on a virtual machine ? What does cat /price/cpuinfo | tail -30 show?

It looks like your host is two physical cores (that the OS thinks are four cores because of hyper threading) so I wouldn’t worry about only seeing 50% cpu usage.

For your test how are you generating traffic? Is it from another host in the same data center? What software are you using to generate your workload?

Are you logging millisecond response times from within nginx?

Sent from my iPhone

On Dec 4, 2017, at 12:42 AM, Chloe LI <stubbo...@gmail.com> wrote:

My performance test environment is as below:

Env: centos
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2

Configurations: worker_connections 4096, worker_processes auto, and upstream keepalive are configured to 128 and keepalive timeout to 30,

When I'm taking a performance test, nginx server CPU wasn't fully taken, just about 50% or less.

Flame graphs of both on-cpu and off-cpu is attached. Could you please help me to analyze performance bottlenecks?

Thank you so much!

.

<nginx_on_cpu_200.svg>

<nginx_off_cpu_200.svg>