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## Problem See #6626 If there is inactive replication slot then Postgres will not bw able to shrink WAL and delete unused snapshots. If she other active subscription is present, then snapshots created each 15 seconds will overflow AUX_DIR. Setting `max_slot_wal_keep_size` doesn't solve the problem, because even small WAL segment will be enough to overflow AUX_DIR if there is no other activity on the system. ## Summary of changes If there are active subscriptions and some logical replication slots are not used during `neon.logical_replication_max_time_lag` interval, then unused slot is dropped. ## Checklist before requesting a review - [ ] I have performed a self-review of my code. - [ ] If it is a core feature, I have added thorough tests. - [ ] Do we need to implement analytics? if so did you add the relevant metrics to the dashboard? - [ ] If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section. ## Checklist before merging - [ ] Do not forget to reformat commit message to not include the above checklist Co-authored-by: Konstantin Knizhnik <knizhnik@neon.tech>