# What is Pgpool-II? Pgpool-II is a tool to add useful features to PostgreSQL, including:
* connection pooling * load balancing * automatic fail over and more. # Minor releases Pgpool Global Development Group is pleased to announce the availability of following versions of Pgpool-II: * 4.2.6 * 4.1.9 * 4.0.16 * 3.7.21 * 3.6.28 This release includes a vulnerability fix. Please take a look at [release notes](https://www.pgpool.net/docs/latest/en/html/release.html). You can download [the source code and RPMs](https://pgpool.net/mediawiki/index.php/Downloads).
