I’ve got something strange that’s just popped up. I’m running Yii on Elastic Beanstalk, using DB sessions. Whenever a user logs out and tries to log back &
in, all hell breaks loose. Essentially they end up getting a series of 504 gateway timeout errors thereafter, and my CPU usage on my EC2 instance balloons to 100% CPU utilization. sometimes they can clear their cache and login, sometimes it takes quite a while before they can access the website again. Whatever the case, the CPU remains at peak for quite some time - often I’ve had to terminate the instance so that a new one can be spawned by the load balancer. Am I missing anything obvious here? I’ve done quite a bit of performance tuning and there aren’t any real huge queries/bottlenecks. I’m at a loss.