Release date: 2015-06-12
This release contains a small number of fixes from 9.1.17. For information about new features in the 9.1 major release, see Section E.107.
A dump/restore is not required for those running 9.1.X.
However, if you are upgrading from a version earlier than 9.1.16, see Section E.91.
Fix rare failure to invalidate relation cache init file (Tom Lane)
With just the wrong timing of concurrent activity, a VACUUM
FULL
on a system catalog might fail to update the “init file”
that's used to avoid cache-loading work for new sessions. This would
result in later sessions being unable to access that catalog at all.
This is a very ancient bug, but it's so hard to trigger that no
reproducible case had been seen until recently.
Avoid deadlock between incoming sessions and CREATE/DROP
DATABASE
(Tom Lane)
A new session starting in a database that is the target of
a DROP DATABASE
command, or is the template for
a CREATE DATABASE
command, could cause the command to wait
for five seconds and then fail, even if the new session would have
exited before that.