PostgreSQL Connection Modes(Session Mode vs. Transaction Mode)
Connection Mode (Session Mode) Each client maintains a dedicated connection to the database for the entire session duration[2]. The connection is only released back to the pool when the client disconnects from the database[2]. This mode replicates a direct connection to PostgreSQL and supports all PostgreSQL features and mechanisms[2]. It’s safer and more compatible with all PostgreSQL clients[2]. Does not significantly reduce the load on database resources[2]. Transaction Mode The connection to PostgreSQL is maintained only for the duration of a transaction[2]. When the transaction completes, the connection is returned to the pool and can be reused by other clients[2]. Allows for a higher number of client connections (up to 10,000) with a smaller pool size[2]. Reduces the load on DBMS resources, especially beneficial for a large number of low-load client connections[2]. More efficient in terms of resource utilization, as idle connections are released back to the pool[3]. Key Differences Connection Duration: ...