On 24.08.23 00:56, Andres Freund wrote:
Hi,

On 2023-08-23 18:32:26 -0400, Tom Lane wrote:
Andres Freund <and...@anarazel.de> writes:
There are other potential uses for libpq in pg_regress though - I'd e.g. like
to have a "monitoring" session open, which we could use to detect that the
server crashed (by waiting for the FD to be become invalid). Where the
connection default issue could matter more?

Meh.  I don't find that idea compelling enough to justify adding
restrictions on what test scenarios will work.  It's seldom hard to
tell from the test output whether the server crashed.

I find it pretty painful to wade through a several-megabyte regression.diffs
to find the cause of a crash. I think we ought to use
restart_after_crash=false, since after a crash there's no hope for the tests
to succeed, but even in that case, we end up with a lot of pointless contents
in regression.diffs. If we instead realized that we shouldn't start further
tests, we'd limit that by a fair bit.

I once coded it up so that if the server crashes during a test, it would wait until it recovers before running the next test. I found that useful. I agree the current behavior is not useful in any case.



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