We’ve been monitoring web traffic, lowering the number of queries needed on some of the landing pages, and even putting the gallery behind security temporarily. These have somewhat lowered the time between crashes but not stopped them overall, which has helped us largely rule out excessive web traffic from a web crawler. Web crawlers have temporarily caused issues with other Wildbooks before, but never this long.
We’ll keep restarting the server when we see these, but we may need to rebuild the server as it is looking more and more like incompatible Linux software, possibly from any recent upgrade of the operating system. The cause is not an obvious one.
Rebuilding the server will need to get scheduled in our upcoming workload if it needs to happen.