Change Details

Periodically (a few times a day), apache response on rendering the enwiki Main_Page times out. This causes pybal to fail healthchecks against that URL and attempt to depool multiple servers. pybal monitoring of the upstream nginx/varnish's also times out on the same URL at the same time, which indicates that a cache invalidation on Main_Page is happening around the same time. Suspicion at this point is this is related to Main_Page content updates, needs further investigation...