Dear Shubham, Thanks for creating a patch. I have one comment about it.
check_publisher() assumed that the SQL function `pg_catalog.current_setting('max_slot_wal_keep_size')` will return the numeric, but it just return the text representation. I.e., if the parameter is set to 10MB, the function returns like below: ``` postgres=# SELECT * FROM pg_catalog.current_setting('max_slot_wal_keep_size'); current_setting ----------------- 10MB (1 row) ``` Your patch can work well because atoi() ignores the latter part of the string, e.g., "10MB" is converted to "10", but this is not clean. I suggest either of 1) accepting the value as the string, or 2) using an SQL function pg_size_bytes() to get max_slot_wal_keep_size. Best regards, Hayato Kuroda FUJITSU LIMITED