CPU peaks, website goes down right after publishing a post

Developer help Self-hosting
1

Hi,

I have a few Ghost websites hosted with DigitalOCean’s 1-click deployment.

Lately, I have noticed that CPU consumption peaks right after publishing a post. This results in slow loading to the website going down momentarily. Things go back to normal after a few minutes.

Here are the stats from Digial Ocean. You can see CPU peaking and load average spiking as soon as the post is published.

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When I first noticed on one website, I increased the server to have 2-core vCPU instead of 1. The problem still persists. I use dedicated, high performance CPU option in Digital Ocean.

I have started noticing this issue on 2 other Ghost installs as well.

Anyone else encountering this issue?

What could be the solution? I don’t want to increase the server configuration to 4 core or 8 core just to survive the temporary spike.

2

Are you “Publishing to email”? How many subscribers?

3

I have encountered it for both normal and neesletter posts.

4

Before you press send, log into the server and start a live tail of the logs:

journalctl -f -u '*ghost*'

And maybe in a second terminal window, run htop during the publish process.

  • Is thing anything interesting in the logs during this time?
  • Does the memory ever reach 100%?
5

The top command always shows node taking too much CPU.

Memory consumption also increases but don’t reach 100%.

6

And what do the Ghost logs show during this time?

7

Which version of Ghost are you running?

8

The latest one at the moment 5.49 but the problem was persistent in older versions too.

9

Will share when I have successfully captured the logs :slight_smile: