Removed the layouts plugin and the location plugin and the problem resolved itself for now. Because its really late my time I haven’t had a chance to isolate whether one or both or none are causing the issue, but @angus@merefield giving you a heads up.
I didn’t have a chance to check the errors before I took down the plugins. And then today I rebuilt Discourse to 2.6.0.beta6 ( e7bad9f05d ). Problem went away.
Een basisvraag, hoe weet men welke plugin hoeveel CPU en geheugen in beslag neemt? htop toont alleen de unicorn workers, maar niet veel bronnen die elke plugin gebruikt.