On Wed, May 27, 2026 at 6:55 PM Xuneng Zhou <[email protected]> wrote: > > Hi, > > Currently, pg_replication_slots can report a non-null safe_wal_size > for a replication slot that has never reserved WAL, if > max_slot_wal_keep_size is finite. > > Such a slot has restart_lsn = NULL and wal_status = NULL. safe_wal_size is > derived from restart_lsn, so it's not meaningful in this state. The > current code handles WALAVAIL_REMOVED but not WALAVAIL_INVALID_LSN > before computing safe_wal_size, leading arithmetic on InvalidXLogRecPtr. > > Fix this by returning NULL for safe_wal_size when WAL availability is > WALAVAIL_INVALID_LSN. >
Fixed the indentation issue in v1 and updated the comment and doc. Not sure this small issue warrants an additional test, still added one in case someone wants it. -- Regards, Xuneng Zhou HighGo Software Co., Ltd.
v2-0001-Fix-safe_wal_size-for-slots-without-restart_lsn.patch
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