Wordpress High Nginx Cpu usage

Exact same server used as EE or different specs ?

It's quite possible that Centmin Mod would use more cpu and memory as it's configured to handle more load and thus use more resources (that's how performance works usually). But it's also possible that traffic patterns and make up of that traffic aren't exactly the same as prior on EE as they are now with Centmin Mod.

FYI, CPU load optimal is 1.0 per cpu thread so 8 cpu thread normal = 8x1 = 8.0. 16 cpu server normal is 16x1 = 16.0

so cpu load of 8 for

• 2 cpu server = 8/2 = 4.0 load average
• 4 cpu server = 8/4 = 2.0 load average
• 8 cpu server = 8/8 = 1.0 load average

When you type top command, hit number 1 to break down per cpu stats

Centmin Mod is provided as is, so troubleshooting load issues is left to end user to do. However, there's many linux tools and scripts that can help you figure out what was causing the load issues and when.

If you're providing info on this forum, more info might be helpful

1. What version of Centmin Mod ? .08 stable or .09 beta ? If .09 beta when was it installed and when was last time you updated ?
2. What's your VPS/Server hardware specifications ? cpu type ? memory available ? disk space ?
3. Who's your web host ? Different hosts have different limits for server resource usage and some are more restrictive that others so it could just be their resource usage policy you tripped which may or may not be restrictive. If restrictive, then real solution would be finding a better web host. If not restrictive, then it's finding out what caused high cpu load.
4. If running Centmin Mod 123.09beta01 or higher, you will have access to a cminfo top command which can also provide a summary of statistics - some of which are explained in info and linked articles below.

Tools and commands you will want to read up on and learn for basic system admin tasks and troubleshooting.

• 20 Command Line Tools to Monitor Linux Performance
• 13 Linux Performance Monitoring Tools - Part 2
• 80 Linux Monitoring Tools for SysAdmins - Server Density Blog
• Amazing ! 25 Linux Performance Monitoring Tools
• 20 Linux System Monitoring Tools Every SysAdmin Should Know
• My mysqlmymonlite.sh script can help with that mysqlmymonlite.sh Addon | Centmin Mod Community README text file has instructions for setting up a cronjob to email you reports i.e. every 10/15min or every hour.

Notes:

• Centmin Mod already installed Glances tool. It can be invoked from SSH command glances or top2. Official Glances site at nicolargo.github.io/glances/ and documentation here.

For example what's output for these commands

Code (Text):

top -bn1

Code (Text):

ps aufxw

Code (Text):

sar -q

Code (Text):

sar -r

Code (Text):

sar -q -f /var/log/sa/sa$(date +%d -d yesterday)

Code (Text):

sar -r -f /var/log/sa/sa$(date +%d -d yesterday)

If you want to look at per process usage stats use pidstat run pidstat every 1 sec for 5 runs and sed is just to replace your main hostname with word hostname so mask your domain for posting on public places

Code (Text):

pidstat -durh 1 5 | sed -e "s|$(hostname)|hostname|g"

for posting code you might want to use CODE tags for code How to use forum BBCODE code tags

 

also how are you measuring the cpu usage on EE and Centmin Mod ?

 

Ah ngxtop can be a life saver. Glad to hear you got to the bottom of the issue

 

nope no automatic database cronjobs are setup by Centmin Mod - you can check your cronjobs to see what runs