RE: Timeout parameters

From: "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com>
To: "Jamison, Kirk" <k(dot)jamison(at)jp(dot)fujitsu(dot)com>, "Nagaura, Ryohei" <nagaura(dot)ryohei(at)jp(dot)fujitsu(dot)com>
Cc: 'Michael Paquier' <michael(at)paquier(dot)xyz>, "AYahorau(at)ibagroup(dot)eu" <AYahorau(at)ibagroup(dot)eu>, 'Fabien COELHO' <coelho(at)cri(dot)ensmp(dot)fr>, "'pgsql-hackers(at)postgresql(dot)org'" <pgsql-hackers(at)postgresql(dot)org>, "MikalaiKeida(at)ibagroup(dot)eu" <MikalaiKeida(at)ibagroup(dot)eu>
Subject: RE: Timeout parameters
Date: 2019-02-22 01:59:20
Message-ID: 0A3221C70F24FB45833433255569204D1FB9F574@G01JPEXMBYT05
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From: Jamison, Kirk [mailto:k(dot)jamison(at)jp(dot)fujitsu(dot)com]
> socket_timeout (integer)

libpq documentation does not write the data type on the parameter name line.

> Terminate any connection that has been inactive for more than the specified
> number of seconds to prevent client from infinite waiting for individual
> socket read operations due to dead connection. This can be used both as
> a force global query timeout and network problems detector. A value of zero
> (the default) turns this off.
>
> or
>
> Controls the number of seconds of connection inactivity to prevent client
> from infinite waiting for individual socket read operations due to dead
> connection. This can be used both as a force global query timeout and network
> problems detector. A value of zero (the default) turns this off.

The second one is better, but:

* Just "connection inactivity" (i.e. the application hasn't submitted any request to the server for a long time) does not terminate the connection.
* "due to dead connction" is not the cause for the timeout. If the timeout occurs, consider the connection dead (see keepalives_count).
* Not restricted to "read" operation?

Regards
Takayuki Tsunakawa

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