The Help Scout reporting servers have a few large indexes. One of those indexes was added this week as we launched 2 new reports. The new index caused reporting servers to quickly run out of memory yesterday and reporting data was unavailable for about 15 minutes. Everything was back to normal after restarting the servers.
We have a good idea of what's causing the problem, but aren't 100% sure. To narrow it down, we're going to put this new index on a separate server. It should allow us to validate the issue and resolve it once and for all.
A small maintenance window is required in order to isolate the new index, which we have scheduled for Sunday morning at 9am EST.