My client’s server has recently started having performance issues. The single website hosted on the server loads very slowly. It is built with WordPress using a custom theme. There are a minimum amount of plugins installed, and none were added in the last few weeks when the performance issues began.
The server has 2 CPUs and 2GB of memory. The server stack is LAMP with Ubuntu 20.04 and PHP FPM. All of the installed software is kept up to date.
Both of the CPUs constantly use more than 80% while running the WordPress site.
The free -m command returns the following: Total 1983, Used 1734, Free 64, Shared 132, Buff/Cache 184, and Available 12.
Rebooting the server temporarily resolves these issues.
Redis Server is installed for object caching. No other caching or optimization plugins are currently installed on the server or in WordPress.
Any suggestions on how to address these issues?
I am novice server administrator, but keen to learn.
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I will recommend to examine if any of the WordPress plugins are causing the extra resource usage on the droplet. Sometimes a faulty plugin can consume a lot of memory or cause CPU usage spikes.
You can monitor the droplet resource usage using
topand other tools. We have a tutorial that covers this process here:
It looks like that you are running quite close to the memory and CPU limits. It might be worth adding some extra resources like RAM and CPU to that Droplet.
Other suggestions would also include:
Let me know how it goes!