On Mon, Jul 10, 2017 at 5:58 PM, Jonathan Vanasco <jonat...@findmeon.com> wrote: > > > On Monday, July 10, 2017 at 9:44:03 AM UTC-4, Mike Bayer wrote: >> >> * Connection pool pre-ping - The connection pool now includes an >> optional "pre ping" feature that will test the "liveness" of a pooled >> connection for every connection checkout, transparently recycling the >> DBAPI connection if the database is disconnected. > > > > Can you please detail where this happens? Would it be on a new Session() or > on the first time the session is actively used (e.g. SQL is emitted)
So the note for this is at: http://docs.sqlalchemy.org/en/latest/changelog/migration_12.html#pessimistic-disconnection-detection-added-to-the-connection-pool then in the main docs, the new flag replaces the previous "pessimistic disconnect" recipe: http://docs.sqlalchemy.org/en/latest/core/pooling.html#pool-disconnects-pessimistic in terms of a Session, the Session in non-autocommit mode, bound to an Engine and not a specific Connection, does a connection pool checkout per transaction, or in autocommit mode does checkout-per-statement, or in autocommit mode when you use begin()/commit() again checkout per transaction. > > -- > 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 post to this group, send email to sqlalchemy@googlegroups.com. > Visit this group at https://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
