max_slot_wal_keep_size
A GUC to limit the amount of storage used by replication slots.
max_slot_wal_keep_size is a GUC to limit the amount of storage used by replication slots.
max_slot_wal_keep_size was added in PostgreSQL 13.
Default
The default value for max_slot_wal_keep_size is -1 (no limit).
Applying changes
Changes to max_slot_wal_keep_size can be applied with pg_reload_conf(), pg_ctl reload or SIGHUP.
Details
postgres=# SELECT * FROM pg_settings WHERE name='max_slot_wal_keep_size';
-[ RECORD 1 ]---+------------------------------------------------------------------------
name | max_slot_wal_keep_size
setting | -1
unit | MB
category | Replication / Sending Servers
short_desc | Sets the maximum WAL size that can be reserved by replication slots.
extra_desc | Replication slots will be marked as failed, and segments released for
| deletion or recycling, if this much space is occupied by WAL on disk.
context | sighup
vartype | integer
source | default
min_val | -1
max_val | 2147483647
enumvals |
boot_val | -1
reset_val | -1
sourcefile |
sourceline |
pending_restart | f
Change history
- PostgreSQL 13
- added (commit c6550776)
References
- PostgreSQL documentation: max_slot_wal_keep_size
Useful links
- PostgreSQL 13: Don’t let slots kill your primary - July 2020 blog article by 2ndQuadrant