I'm willing to set-up a pooler like pgbouncer, but have some questions as my scenario is not that easy:
1 Load Balancer (nginx)
2 web servers (www01 and www02)
5 DB servers (master01, slave01 (read-only), slave02 (hot_standby), slave03 (hot_standby), slave04 (hot_standby)
Just ONE Database. Size: 2TB
I'm using PostgreSQL 9.2
Can pgbouncer handle with my master and slave01, as I'm using slave01 as read-only server? Also.. I've got 2 www servers... Do I have to have pgbouncer in both of them?