Unable to load wp-admin due to high resource spikes

  • Hi,

    I’ve been working on a test website on a subdomain without any issues since February this year. Since July, I started experiencing random spikes in resource usage, even though I don’t have any visitors:

    • CPU resources limit was reached for your site
    • Physical memory resources limit was reached for your site
    • I/O usage resources limit was reached for your site <— Mainly this one

    Since then, I have not been able to continue working on my website because wp-admin keeps loading forever.

    I tried disabling all plugins, restoring an old backup, using different browsers and private windows, disabled WP heartbeat and installed a caching plugin. But all don’t seem to work.

    I looked at the resource log, and I can see the limits are reached because of some faults:

    Faults: https://ibb.co/6XGpGMX

    I/O usage: https://ibb.co/7nQgWRs

    Physical memory usage: https://ibb.co/gTsDZKX

    I investigated the snapshots and can see that the following take up a lot of MEM:

    • lsphp:l/public_html/test01/wp-admin/admin-ajax.php
    • usr/sbin/httpd -DFOREGROUND
    • lsphp:ns/mug-cakes.nl/public_html/test01/index.php
    • lsphp:s/mug-cakes.nl/public_html/test01/xmlrpc

    Example: https://ibb.co/98wHvPq

    This is the process list for August 8 12:17 am: https://ibb.co/YTfWjX8

    And these are the http queries of August 8 12:17 am: https://ibb.co/YctVt2y

    I know the second query is from a spambot, as I’ve been getting a lot of spam comments on that web page (which have not been posted because I am using an anti-spam plugin).

    I’ve spent so many days trying to find the culprit of these large, seemingly random spikes/faults that prevent me from using wp-admin, but no luck so far.

    Any help is very much appreciated!!

    • This topic was modified 1 year, 7 months ago by chloeponee.
    • This topic was modified 1 year, 7 months ago by chloeponee.

    The page I need help with: [log in to see the link]

Viewing 2 replies - 1 through 2 (of 2 total)

  • That sounds like a frustrating problem. I’d try talking to your host to see if they can see anything their end. Also, you mention this is a subdomain. Is your main domain affected as well, or just this subdomain? If the main domain gets hammered by bots, or has some other issue, the subdomain might be affected too.

    Hope that helps…

    Thread Starter chloeponee

    (@chloeponee)

    Hi, thanks for your reply.
    I’ve talked to my host, but they couldn’t help me any further and just proposed to upgrade my hosting..

    The odd thing is, is that my main domain is not affected, both the website itself and the wp-admin side.. It’s just my subdomain. And this started suddenly last month.

    I installed protective plugins against spam on both websites, including wordfence, cleantalk and a few more.

Viewing 2 replies - 1 through 2 (of 2 total)
  • The topic ‘Unable to load wp-admin due to high resource spikes’ is closed to new replies.