When query_cache_type is enabled the server frequently crashes. Since it runs on Azure I have no access to the logs and I did not get them when requested.
Azure support wrote this:
We got update from our engineering team that server was down because of query cache is not disabled. query_cache_type is a static variable and needs to restart the server to take it effect. So, can you please set query_cache_type parameter to OFF and query_cache_size as 0, and restart server as need to see if the variable query_cache_type as OFF.
The server is quite slow. A similar configuration on Googe Cloud (MySQL however) is much faster. I suspect this setting affects performance.
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Bug
Major