On Wed, Nov 18, 2015 at 11:18 AM, Jeff Janes <jeff.janes@gmail.com> wrote:
>
> I get an error when running pg_upgrade from 9.4 to 9.6-this
>
> error while copying relation "mediawiki.archive"
> ("/tmp/data/base/16414/21043_vm" to
> "/tmp/data_fm/base/16400/21043_vm"): No such file or directory
OK, so the problem seems to be that rewriteVisibilitymap can get
called with errno already set to a nonzero value.
It never clears it, and then fails at the end despite that no error
has actually occurred.
Just setting it to 0 at the top of the function seems to be correct
thing to do. Or does it need to save the old value and restore it?
But now when I want to do the upgrade faster, I run into this:
"This utility cannot upgrade from PostgreSQL version from 9.5 or
before to 9.6 or later with link mode."
Is this really an acceptable a tradeoff? Surely we can arrange to
link everything else and rewrite just the _vm, which is a tiny portion
of the data directory. I don't think that -k promises to link
everything it possibly can.
Cheers,
Jeff