Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. It only takes a minute to sign up.
Sign up to join this community
If I set up a pgbouncer.ini config file with several database entries, does pgBouncer create a separate pool for each one? I would think so, but have not been able to confirm this.
For example, with something like this:
[databases] db1 = ... db2 = ... [pgbouncer] . . . max_client_conn = 480 default_pool_size = 250
Would I have a default pool of 250 for each DB and a max of 480, or a total of 250 default and max of 480 connections that are shared between both?
Thanks very much!
Yes, pgbouncer creates a separate pool for each database. You really don't want a pool size as big as 250 in a scenario like this - because that is 250 connections from pgbouncer to the postgres server for each database.
The max of 480 is the total number of connections from clients into pgbouncer, regardless of which database they go into.
Would I have a default pool of 250 for each DB and a max of 480, or a total of 250 default and max of 480 connections that are shared between both?
You will have one pool per DB per user (or role) of you omit specifying user in db1 or db2 lines inside [databases] section. Though you can enforce connecting with some predefined user if you want.
You kind of misunderstood what max_client_conn is . It is the "lightweight" connections limit. The max connections made TO pgbouncer not to database server.
