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Can anyone here help me understand persistent PDO connections?
So I set up Patroni cluster, everything works as expected. But during the failover/switchover PHP remembers connections to the failed node. And I can’t figure out why. Reloading FPM is kind of PitA.
I will use PgBouncer. But I still would like to know how PHP works with the persistent connections.
I haven’t used persistent connections although I have been tempted in the past. I believe, if you haven’t used it before, it might come with more trouble than it solves.
As an alternative I could propose using amphp (or maybe react PHP) which will let you handle a pool of connections in a single long running process. But it’s a bigger change really, the more I think of it.
Yeah, but any ‘single server’ PHP defeats the purpose of PHP, so I’m not a huge fan.
I’ve used them in the past, and they work great, until you have to switchover to another node.