max_wal_size v17

Parameter type: Integer

Default value: 1 GB

Range: 2 to 2147483647

Minimum scope of effect: Cluster

When value changes take effect: Reload

Required authorization to activate: EDB Postgres Advanced Server service account

max_wal_size specifies the maximum size for the WAL to reach between automatic WAL checkpoints. This is a soft limit. WAL size can exceed max_wal_size under special circumstances, such as when under a heavy load, with a failing archive_command, or with a high wal_keep_segments setting.

Increasing this parameter can increase the amount of time needed for crash recovery. You can set this parameter in the postgresql.conf file or on the server command line.