Re: Queries that should be canceled will get stuck on secure_write function

On Fri, Aug 27, 2021 at 3:24 PM Andres Freund <andres@anarazel.de> wrote:
> I wonder if we could improve the situation somewhat by using the non-blocking
> pqcomm functions in a few select places. E.g. if elog.c's
> send_message_to_frontend() sent its message via a new pq_endmessage_noblock()
> (which'd use the existing pq_putmessage_noblock()) and used
> pq_flush_if_writable() instead of pq_flush(), we'd a) not block sending to the
> client before AbortCurrentTransaction(), b) able to queue further error
> messages safely.

pq_flush_if_writable() could succeed in sending only part of the data,
so I don't see how this works.

-- 
Robert Haas
EDB: http://www.enterprisedb.com