# Requirements

pg_hint_plan 1.5 requires PostgreSQL 15.

PostgreSQL versions tested

- Version 15

OS versions tested

- CentOS 8.5

See also
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## References

- [EXPLAIN](http://www.postgresql.org/docs/current/static/sql-explain.html)
- [SET](http://www.postgresql.org/docs/current/static/sql-set.html)
- [Server Config](http://www.postgresql.org/docs/current/static/runtime-config.html)
- [Parallel Plans](http://www.postgresql.org/docs/current/static/parallel-plans.html)