| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Jelte Fennema-Nio <postgres(at)jeltef(dot)nl> |
| Cc: | Alexander Lakhin <exclusion(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Noah Misch <noah(at)leadboat(dot)com>, Jacob Champion <jacob(dot)champion(at)enterprisedb(dot)com>, Denis Laxalde <denis(dot)laxalde(at)dalibo(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Greg Stark <stark(at)mit(dot)edu>, "Gregory Stark (as CFM)" <stark(dot)cfm(at)gmail(dot)com>, Jelte Fennema <Jelte(dot)Fennema(at)microsoft(dot)com>, Daniel Gustafsson <daniel(at)yesql(dot)se>, Peter Eisentraut <peter(at)eisentraut(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com> |
| Subject: | Re: [EXTERNAL] Re: Add non-blocking version of PQcancel |
| Date: | 2024-08-30 20:55:09 |
| Message-ID: | 591893.1725051309@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
I wrote:
> Hmm. I'm not convinced that 0001 is an actual *fix*, but it should
> at least reduce the frequency of occurrence a lot, which'd help.
After enabling log_statement = all to verify what commands are being
sent to the remote, I realized that there's a third thing this patch
can do to stabilize matters: issue a regular remote query inside the
test transaction, before we enable the timeout. This will ensure
that we've dealt with configure_remote_session() and started a
remote transaction, so that there aren't extra round trips happening
for that while the clock is running.
Pushed with that addition and some comment-tweaking. We'll see
whether that actually makes things more stable, but I don't think
it could make it worse.
regards, tom lane
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