The bottom line – Pgpool-II is a great tool if you need load-balancing and high availability. Connection pooling is almost a bonus you get alongside. PgBouncer does only one thing, but does it really well. If the objective is to limit the number of connections and reduce resource consumption, PgBouncer wins hands down.
Is PgBouncer a load balancer?
PgBouncer is a popular connection pooler designed for PostgreSQL, but it is not enough to achieve PostgreSQL High Availability by itself as it doesn’t have multi-host configuration, failover, or detection. Using a Load Balancer is a way to have High Availability in your database topology.
What is Pgpool in Postgres?
Pgpool-II is a proxy software that sits between PostgreSQL servers and a PostgreSQL database client. It does that by distributing SELECT queries among available servers, improving the system’s overall throughput. In an ideal scenario, read performance could improve proportionally to the number of PostgreSQL servers.
Do I need PgBouncer?
For those who do not know, PgBouncer a lightweight connections pooler for PostgreSQL. It reduces PostgreSQL resource consumption (memory, backends, fork). It supports online restart/upgrade without dropping client connections. It allows PostgreSQL restart/upgrade without dropping client connections.
What is PgBouncer in PostgreSQL?
PgBouncer is an open-source, lightweight, single-binary connection pooler for PostgreSQL. It can pool connections to one or more databases (on possibly different servers) and serve clients over TCP and Unix domain sockets. PgBouncer maintains a pool of connections for each unique user, database pair.
Do I need Pgbouncer?
What is Pgbouncer in PostgreSQL?
Is Pgpool-II open-source?
Pgpool-II is an open source project and the contribution style follows the way PostgreSQL does except that we don’t have CF application. Source code is managed by the git repository.
Why should I use Pgbouncer?
How many connections can Pgbouncer handle?
To test the benefit of connection poolers, I installed pgbouncer on the server running pgbench. pgbouncer was configured to allow up to 5,000 client connections but only open a maximum of 200 connections against our test RDS PostgreSQL instance. pgbench was then run against this pgbouncer pool.
What is Pgbench in PostgreSQL?
pgbench is a simple program for running benchmark tests on PostgreSQL. It runs the same sequence of SQL commands over and over, possibly in multiple concurrent database sessions, and then calculates the average transaction rate (transactions per second). (In -T mode, only the actual number of transactions is printed.)
What is the difference between PG_bench-II and PG_pgbouncer?
PgBouncer allows limiting connections per-pool, per-database, per-user or per-client. Winner! Pgpool-II allows limiting the overall number of connections only. PgBouncer supports queuing at the application level (i.e. PgBouncer maintains the queue). Winner! Pgpool-II supports queuing at kernel level – this can cause pg_bench on CentOS 6 to freeze.
What is pgpool-II and how does pgpgbouncer work?
PgBouncer is a good match for this case because it excels at pooling down from 1,000 database connections to 100, which can save serious resources in Postgres. Pgpool-II is often implemented by organizations because of its added capabilities, but that doesn’t necessarily make Pgpool-II the ideal choice for all use cases.
Can I use pgbouncer and pgpool-II in a chain?
It is also perfectly fine to use both PgBouncer and Pgpool-II in a chain – you can have a PgBouncer to provide connection pooling, which talks to a Pgpool-II instance that provides high availability and load balancing. This gives you the best of both worlds!
Is pgpool-II the right choice for your use case?
Pgpool-II is often implemented by organizations because of its added capabilities, but that doesn’t necessarily make Pgpool-II the ideal choice for all use cases. Many perceive Pgpool-II as an end-all solution, but in reality, PgBouncer is often a better solution for scenarios where bringing down database connections is key.
