'sudden memory usage spike hitting GCP App Engine project
I have a GCP app running in the standard environment on php 7.4 and using mysqli to access google cloud SQL. Instance class is F2 and has been for years. This morning, out of nowhere and with no code or configuration changes, the memory usage has spiked to the point where it is exceeding the quota and restarting the service so often the system has become unusable. It doesn't matter how many people are logged in. Pages that don't access the database seem unaffected so it appears to be related to SQL.
One other note: my WordPress site calls into this system using XMLHttp, and that query is working fine.
I am at a loss and my clients are dead in the water. How can I figure out what's causing this? It sure seems like they must have changed something on the platform side.
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