Re: Connection Timeout Issue due to intermittent non-response of Postgre database

On Sun, 5 Nov 2023 at 19:45, 이상원 <swlee(dot)kioplo(at)gmail(dot)com> wrote:

> Thanks, I'll check it out. then, I will update to all.
>
> 2023년 11월 5일 (일) 오전 12:33, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>님이 작성:
>
>> =?UTF-8?B?7J207IOB7JuQ?= <swlee(dot)kioplo(at)gmail(dot)com> writes:
>> > The Postgre database does not respond intermittently, causing a
>> connection
>> > timeout in the Spring Framework. There is no regularity in the
>> occurrence
>> > of connection timeouts and they do not repeat continuously. Not easy to
>> > track.
>>
>> I'd try turning on statement logging, and maybe also statement duration
>> logging, and then matching up the times of observed client-side outages
>> with what's happening according to the postmaster log. Connection
>> and disconnection logging might be useful too.
>>
>> A likely bet about the root cause is an unreasonably short connection
>> timeout in some network infrastructure between your client and the
>> database server. That would manifest as both sides reporting that the
>> other side disconnected (not necessarily at the same time, but for the
>> same connection). If so, it could likely be cured by adjusting the
>> database's TCP keepalive settings. But you ought to gather data
>> first.
>>
>
I would have to agree that it is very likely a network issue.

Dave