Starting from December 24, 2019, disk space has been increasing on maps servers. The most space increase happens on postgresql. There is a strong temporal correlation with the increase of OSM replication frequency.
As a stop gap measure, replication is paused, so no new writes should happen on those servers, which will give us some time to understand the issue. The impact is that no new tiles will be generated and we're going to be out of sync with OSM.