Every so often, my entire site goes down for an indefinite period of time. Restarting the MySQL service appears to temporarily fix the issue. I recently upgraded to EE 2.7 and about the same time my website started to experiencing a bit of a slow down. Just when this error occurred, I noticed a huge spike in response time (1 million ms) for PHP processing in New Relic!
Above image shows a 30 hour window for New Relic
This shows a 6 hour window for new relic
Any ideas on what could be happening? Any suggestions for diagnosing this? Remember, this error only occurs periodically and seemingly without warning.