How do I use different PostgreSQL versions?
Most of the PostGreSQL commands take the “-p ####” or “–port=####” option, so you can use that to select the version you want. To list all installed clusters (name, port, status, data directory etc.) use pg_lsclusters command.
How can I tell if Postgres is running on Ubuntu?
Using the Shell Command Line
- $ postgres -V postgres (PostgreSQL) 9.3.10.
- $ /usr/lib/postgresql/9.3/bin/postgres -V postgres (PostgreSQL) 9.3.10.
- $ psql -V psql (PostgreSQL) 9.3.10.
- $ /usr/lib/postgresql/9.3/bin/psql -V psql (PostgreSQL) 9.3.10.
How is a minor version of PostgreSQL numbered?
Minor releases are numbered by increasing the last part of the version number. Beginning with PostgreSQL 10, this is the second part of the version number, e.g. 10.0 to 10.1; for older versions this is the third part of the version number, e.g. 9.5.3 to 9.5.4.
What happens when you upgrade PostgreSQL to 10.11?
For example, an upgrade from 9.6 .12 to 10 .11 is a major version upgrade, where 9.6 and 10 are the major version numbers. Major version upgrades can contain database changes that are not backward-compatible with previous versions of the database. This functionality can cause your existing applications to stop working correctly.
Do you need to upgrade read replicas in PostgreSQL?
If your PostgreSQL DB instance is using read replicas, you must upgrade all of the read replicas before the minor version upgrade of the source instance. For more details, see Automatic minor version upgrades for PostgreSQL. For information about manually performing a minor version upgrade, see Manually upgrading the engine version .
Which is the major version of PostgreSQL engine?
For PostgreSQL versions earlier than 10, the engine version number is in the form major.major.minor. The major engine version number is both the integer and the first fractional part of the version number. For example, 9.6 is a major version.