Level replica is required for binary replication, and level logical is required for logical replication. This is a setting because raising the level adds more writes to the WAL, so if you’re not doing …

13 Samh 2025 · If archive_command is an empty string (the default) while archive_mode is enabled (and archive_library is set to an empty string), WAL archiving is temporarily disabled, …

When this parameter is on, the PostgreSQL server writes the entire content of each disk page to WAL during the first modification of that page after a checkpoint.

wal_level is a configuration parameter determining the level of detail written to WAL. wal_level was added in PostgreSQL 9.0. The default value for wal_level is: wal_level can only be changed …

There are several WAL -related configuration parameters that affect database performance. This section explains their use. Consult Chapter 18 for general information about setting server …

Specifies the maximum number of concurrent connections from standby servers or streaming base backup clients (i.e., the maximum number of simultaneously running WAL sender …

13 Samh 2025 · Using WAL results in a significantly reduced number of disk writes, because only the WAL file needs to be flushed to disk to guarantee that a transaction is committed, rather …

Copy WAL directory (by default on Ubuntu - /var/lib/postgresql/<version>/main/pg_wal) to new file path using rsync. It will preserve file/folder permissions and folder structure with the -a flag.

You can delete the default publication and create your own (name: wal-listener) with the necessary filtering conditions, and then the filtering will occur at the database level and not at …

2 Samh 2020 · WAL doesn't let you go backwards in time, only forwards. When restoring you would normally restore your data files from your backup (eg one taken with pg_basebackup).