Having hit the maximum socketdir length error a number of times in pg_upgrade, especially when running tests in a deep directory hierarchy, I figured it was time to see if anyone else has had the same problem? The attached patch is what I run with locally to avoid the issue, it adds a --socketdir=PATH option to pg_upgrade which overrides the default use of CWD. Is that something that could be considered?
cheers ./daniel
pg_upgrade_sockdir.patch
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