Andrew Anderson <forumwriter...@gmail.com> writes: >> What's using it?
> As I think, streaming replication is using this slot. Does anybody know how
> to fix it ?
Unless you need another replica that's downstream of the standby,
you should not be maintaining a replication slot on the standby.
There may be a way to have a slot that's not actually holding back
WAL cleanup while doing nothing, but I don't know what it is.
regards, tom lane
