a single Engine only points to one database URL at a time. so to that extent, as an Engine assumes there's a "default database" when it connects, any concept of multiple "databases" beneath that is not something the Engine is aware of.
PostgreSQL itself has no "USE" command, so if you have a connection to a PostgreSQL database, that's the one you're talking to, so given this architecture you would definitely need to create an individual Engine per database. OTOH if these are actually PostgreSQL **schemas** and not databases, that would be something entirely different, but you haven't specified this. On Tue, Mar 22, 2022, at 10:26 AM, Mustafa Demiraslan wrote: > Current structure is like this: > > image.png > > I can't manage pooling for green colored databases. > > > Mike Bayer <mike...@zzzcomputing.com>, 22 Mar 2022 Sal, 17:12 tarihinde şunu > yazdı: >> __ >> for one engine with 18 databases, what is "switching the bindings" ? do >> you mean you call "USE <database>" on the connection ? >> >> creating 18 separate engines would not be that big a deal if that's what >> works best for the code, no issue doing that. >> >> On Tue, Mar 22, 2022, at 9:41 AM, Mustafa Demiraslan wrote: >>> Hi team, >>> I am using 3 database engines at the same time, 1(include 1 database) + >>> 1(include 1 database) + 1(include 18 database). I use the database >>> containing 18 databases by switching the bindings. I connect to database >>> using sessions with session_maker for each engine. During the load test, I >>> am stuck on the max_connection limit for the part containing 18 databases. >>> Do you think the right approach is to create a separate engine for each >>> database(1+1+18 engine) or is it a single engine multiple binding? I would >>> be very happy if you express your thoughts. >>> >>> Regards, >>> Mustafa >>> >>> >>> -- >>> SQLAlchemy - >>> The Python SQL Toolkit and Object Relational Mapper >>> >>> http://www.sqlalchemy.org/ >>> >>> To post example code, please provide an MCVE: Minimal, Complete, and >>> Verifiable Example. See http://stackoverflow.com/help/mcve for a full >>> description. >>> --- >>> You received this message because you are subscribed to the Google Groups >>> "sqlalchemy" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to sqlalchemy+unsubscr...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/sqlalchemy/f196963c-9a0b-4359-b972-27010dfdcaden%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/sqlalchemy/f196963c-9a0b-4359-b972-27010dfdcaden%40googlegroups.com?utm_medium=email&utm_source=footer>. >> >> >> >> -- >> SQLAlchemy - >> The Python SQL Toolkit and Object Relational Mapper >> >> http://www.sqlalchemy.org/ >> >> To post example code, please provide an MCVE: Minimal, Complete, and >> Verifiable Example. See http://stackoverflow.com/help/mcve for a full >> description. >> --- >> You received this message because you are subscribed to the Google Groups >> "sqlalchemy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sqlalchemy+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sqlalchemy/97a1ad3f-2752-4fc4-9997-fcefff3b4589%40www.fastmail.com >> >> <https://groups.google.com/d/msgid/sqlalchemy/97a1ad3f-2752-4fc4-9997-fcefff3b4589%40www.fastmail.com?utm_medium=email&utm_source=footer>. > > > -- > SQLAlchemy - > The Python SQL Toolkit and Object Relational Mapper > > http://www.sqlalchemy.org/ > > To post example code, please provide an MCVE: Minimal, Complete, and > Verifiable Example. See http://stackoverflow.com/help/mcve for a full > description. > --- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sqlalchemy/CAM%2BjLs8-po%3DoFJyv1vFKionj8nuMpUU2DQm7AvkHTOEYUbi1QQ%40mail.gmail.com > > <https://groups.google.com/d/msgid/sqlalchemy/CAM%2BjLs8-po%3DoFJyv1vFKionj8nuMpUU2DQm7AvkHTOEYUbi1QQ%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sqlalchemy/bddd27ef-3c59-4b24-b3f3-e42b0876886c%40www.fastmail.com.
