Re: client_connection_check_interval default value

On Mon, Mar 9, 2026 at 6:03 PM Hüseyin Demir <huseyin.d3r@gmail.com> wrote:
>
> Hi Fujii,
>
> Thanks for the patch. The rate-limiting approach makes sense to me. A couple of thoughts:
>
> 1) I think Chao Li's suggestion of using max(10s, deadlock_timeout) as the rate limit interval is worth adopting. If someone has set deadlock_timeout to, say, 30s or 60s, they've already signaled they don't need frequent lock-wait feedback. Logging every 10s after a 60s deadlock_timeout feels inconsistent with that intent.

Or perhaps they expect the log message to be emitted only once,
just after deadlock_timeout, similar to the current behavior when
client_connection_check_interval is not set, I guess.

I'm now starting thinking it might be better to preserve the existing
behavior (emitting the message once per wait) regardless of whether
client_connection_check_interval is set, and implement that first.

If there is a need to emit the message periodically, we could add that
as a separate feature later so that it works independently of
the client_connection_check_interval setting.

Thought?

Regards,

-- 
Fujii Masao