Database overload.............but why?There're hardly more than 10 active users at any one time.........................
There are only a handful of reasons why that message should show up :
1. DDoS attack in progress. Cloudflare should kick in to handle it.
2. Server or network glitch. eg server went through an autoreboot for some reason.
3. Database maintenance being performed or database backing up.
4. Server actually overloaded because the forum traffic is too high for the hardware or pipes to manage.
4 is not possible as I have plenty of spare capacity so the error must be caused by 1 to 3.