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From: Bee.Lists <[email protected]>
To: Tom Lane <[email protected]>
Cc: Submit Postgresql Novice <[email protected]>
Subject: Re: Connections Increasing Slowly
Date: Tue, 23 Jun 2020 13:25:11 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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On Jun 22, 2020, at 10:07 PM, Tom Lane <[email protected]> wrote:
> 
> Hmm.  If the client thinks the server dropped the connection, but the
> server thinks the connection is still live, that smells strongly of
> network-level disconnects.  Does the client let the connection sit idle
> for more than a minute or two at a time?  If so I'd bet that some firewall
> in between is deciding that the connection is dead and dropping it.
> Again, setting the server's tcp_keepalives_* settings could help fix that,
> by ensuring that the network connection sees some traffic regularly.
> 
> 			regards, tom lane

Hi Tom.  Some more testing. 

Turned off firewalld, same issue.  Some notes:

I have one simple query that’s in my activity (currently active) that’s in there 5 times.  It should have closed very quickly, yet there’s 5 instances idling.  I have two other queries, that should have operated quickly, then closed, but they are idling.  

tcp_keepalives* are around 3.

Any idea where to look now?

I’ve set my max_connections to 12 (4 cores * 3).


Cheers, Bee

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