On 2018-Oct-29, Joshua D. Drake wrote: > -Hackers, > > > Working on 9.6 today (unsure if fixed in newer versions). Had an issue where > the wal was 280G despite max_wal_size being 8G. Found out there were stale > replication slots from a recent base backup. I went to drop the replication > slots and found that since the wal_level was set to minimal vs replica or > higher, I couldn't drop the replication slot. Clearly that makes sense for > creating a replication slot but it seems like an artificial limitation for > dropping them.
This sounds closely related to https://www.postgresql.org/message-id/20180508143725.mn3ivlyvgpul6ovr%40alvherre.pgsql (commit a1f680d962ff) wherein we made it possible to drop a slot in single-user mode. Seems worth fixing. Send a patch? -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
