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Save slot's restart_lsn when invalidated due to size

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We put it aside as invalidated_at, which let us show "lost" in
pg_replication slot.  Prior to this change, the state value was reported
as NULL.

Backpatch to 13.

Author: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://postgr.es/m/20200617.101707.1735599255100002667.horikyota.ntt@gmail.com
Discussion: https://postgr.es/m/20200407.120905.1507671100168805403.horikyota.ntt@gmail.com
This commit is contained in:
Alvaro Herrera
2020-06-24 14:15:17 -04:00
parent 368d7f3297
commit 0188bb8253
5 changed files with 16 additions and 3 deletions
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src/backend/replication/slot.c
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@@ -1226,6 +1226,7 @@ restart:
(uint32) restart_lsn)));
SpinLockAcquire(&s->mutex);
s->data.invalidated_at = s->data.restart_lsn;
s->data.restart_lsn = InvalidXLogRecPtr;
SpinLockRelease(&s->mutex);
ReplicationSlotRelease();