Random large TTFBs slowing down website
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Hey WordPress experts,
I’m having trouble with my WordPress site and cannot for the life of me figure out what’s causing it. For some reason, random files seem to have TTFBs of 40 seconds or over a minute, causing the site to load incredibly slowly. So far here are the steps I’ve taken or things I’ve looked at:
- Logs of the Digital Ocean droplet’s memory usage, bandwidth, CPU, and Disk I/O show that all are consistently low. So it doesn’t appear to be a resources issue.
- After updating all the components didn’t work, we used the Duplicator plugin to literally pickup the site and move it to a new server on Ubuntu 18.04. The problem still exists.
- We tried disabling all plugins, and the problem still existed, so it doesn’t seem to be caused by a faulty plugin either (we don’t have many active ones anyway).
- Rebooting the server seems to fix the problem temporarily (e.g. for an hour or so).
- We use cloudflare as a CDN and everything seems fine there – directly accessing our site by IP also has the problem.
The site has been running fine for over a year and yet in the last 2 weeks has just become unusable, and I have no idea what’s changed. If anyone could provide some insight, I’d be hugely appreciative.
Also, after the problem starts occurring, we also see the following in the Site Health page in reference to the REST API and a loopback request:
Error: [] cURL error 28: Operation timed out after 10001 milliseconds with 0 bytes received
The page I need help with: [log in to see the link]
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