Raj, when you turned on pgbouncer, did you check if it's set to "transaction mode" & not "session mode"?
Also worth checking if pgbouncer itself is maxing out a CPU core during the slow test, both are common causes of a TPS drop like that, separate from Postgres itself.
From: Raj <rajeshkumar.dba09@gmail.com>
Sent: Sunday, June 21, 2026 9:25 AM
To: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: TPS in direct Postgres Vs TPS in pgbouncer
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Hi All,
When the application team is using posytgres directly for 17.9 version, they get necessary TPS.
When they use pgbouncer, they get 50% reduction in TPS.
What are general advices?
My set up is 3 node PATRONI, where node3 is DR and manual failover.
Two nodes (node1 and node2) are in site A ..having haproxy, pgnouncer is bound with haproxy.
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