E_ERROR

Hey Robert thanks for the quick reply.

I do believe I’ve figured this one out, at least for now. After enabling WP Debugging with the client’s permission, I was able to determine that the WP Memory was being exhausted. Had to bump it from 128MB to 512MB in order to resolve the issue. I’m not sure what has changed that suddenly the system needs 3x more memory than it used to, but I do update plugins as soon as updates are available so it could be any number of conflicts. No new plugins have been installed – just so happens your plugin was the only one that kept turning up in the logs. I don’t see any indication of other resources such as CPU increasing though – just seems to be memory.

For the record, on this site, there are 3 monster plugins – WooCommerce, JetPack, and Paid Memberships Pro (latest versions). The customer also purchased extensions for WooCommerce and Paid Memberships Pro, each extension counts as an additional plugin so the plugin count for this site way higher than what I’d normally consider appropriate (like 40) – but the large majority of these extensions are not much more than small code snippets. The site runs on PHP 7.3. It’s still odd though, all of these have been running for almost 2 years with base memory and I’ve had no issues until now.

I’ll keep monitoring for any additional error messages, but haven’t had a problem ::knock on wood:: since I upped the memory.

@robert681 just an FYI, this also occurred on another site of mine. This one doesn’t have any ‘heavy’ plugins and the error only occurred when doing a purge all on my cache. Same error message though referencing a PHP memory exhaustion on /wp-content/plugins/wp-security-audit-log/classes/Sensors/Database.php.

I bumped the PHP memory from 256MB to 512MB and that resolved the issue. May be worth nothing though, that something has changed with this plugin seeming to be the common denominator. Everything appears to be working normally though after the memory adjustment.