E.89. Release 9.1.18
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 .
E.89.1. Migration to Version 9.1.18
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 .
E.89.2. Changes
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Fix rare failure to invalidate relation cache init file (Tom Lane)
With just the wrong timing of concurrent activity, a
VACUUM FULLon 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 DATABASEcommand, or is the template for aCREATE DATABASEcommand, could cause the command to wait for five seconds and then fail, even if the new session would have exited before that.