Matt 🌻
My blog (@coxy) is hosted on a very small server package from the hosting company. It costs me about £10/month and does the job just fine.
Until I installed the #ActivityPub plug-in on #WordPress and now every interaction I get from #Mastodon to my WordPress blog takes the site offline.
:kakao_confused:
Annika Backstrom
@matt Any ideas what a resolution might look like? Do you already have caching in place, or does the AP plugin do a ton of writes or something?
Annika Backstrom
@matt There are lots of options for caching, I'd be super curious if one of them helps without too much configuration required https://wordpress.org/documentation/article/optimization-caching/
Matt 🌻
@thomasp I'm guessing its due to all the requests coming in from way over 300 servers at the same time.
You can see when the requests stop being successful and start failing. I think it triggers some sort of limit on the server.
Thomas Pike
@matt certainly doesn't seem good...
Might be worth asking your hosting provider if they have any idea what's happening. If it is somehow taking down the PHP-FPM service (or whatever PHP backend is in use), then that's pretty unusual, and something they should look at.
Matt 🌻
@thomasp I'm going to say this is part of the problem...
Thomas Pike
@matt In what way does the site go offline? Does the PHP service get killed?
Does anything show up in the error logs?
Matt 🌻
@thomasp I don't know. I don't know how to do server management.
...that's why I outsource oslo.town hosting to masto.host 😆
Let me go and check the logs.
Annika Backstrom
@matt "Error establishing a database connection" :D
is that with caching?
Matt 🌻
@annika Oh, maybe I figured it out with the help of YouTube.
Matt 🌻
@annika Oh, I think its something to do with this... but I don't really know what any of it means. 😕
Any more advice?
https://developer.wordpress.org/plugins/cron/hooking-wp-cron-into-the-system-task-scheduler/
Annika Backstrom
@matt it seems to have come back a lot faster this time
Bob Jonkman
Yup, 100% CPU utilization is what we saw on our webhost too. And it didn't go away unless I renamed the WordPress index.php in the document root and killed all the lsphp processes...
I've deactivated both the ActivityPubPlugin and the WebFinger plugin on that site until we can bring the blog in-house on our own server. But that may be months away yet.
Matthias Pfefferle
@matt @thisismissem WP_Cron will not be triggered by external calls (at least not by ActivityPub). It might be the default behaviour, but then it shouldn't cause a lot of load if there is nothing to trigger.
It's very hard to get a page cached properly on a small/low price hosting plan. Cloudflare has some issues with ActivityPub requests: https://dustinrue.com/2023/09/wordpress-activitypub-and-cloudflare/ and caching does not always vary between Browser Calls and ActivityPub Calls: https://github.com/Automattic/wordpress-activitypub/issues/580
Matt 🌻
@thisismissem I have Cloudflare set up, but the site still goes down 😆
Does this make sense: https://oslo.town/@matt/111693835980201114
Now, after moving the wp-cron.php tasks from running as default, to scheduling them in the backend (cPanel), the site throws up a database error now for a minute or so instead of... just not loading at all.
Any advice welcome.
Emelia 👸🏻
@matt @thomasp these are all GET requests so highly cacheable by a CDN, so that'd probably be what I'd recommend if you've not one in place (e.g., fastly, cloudflare, etc)
Matthias Pfefferle
@matt @thisismissem Have you tried WP Super Cache? This works really nice with ActivityPub and I think they also support API caching.
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