Tom, all: First draft of the release announcement.
Please improve/edit/correct. Thanks! -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com
2015-06-12 Update Release ========================= The PostgreSQL Global Development Group has released an update to all supported versions of our database system, including 9.4.4, 9.3.9, 9.2.13, 9.1.18 and 9.0.22. This release primarily fixes issues not successfully fixed in prior releases. It should be applied as soon as possible by any user who installed the May or June update releases. Other users should apply at the next available downtime. Crash Recovery Fixes --------------------- Earlier update releases attempted to fix an issue in PostgreSQL 9.3 and 9.4 with "multixact wraparound", but failed to account for issues doing multixact cleanup during crash recovery. This could cause servers to be unable to restart after a crash. As such, all users of 9.3 and 9.4 should apply this update as soon as possible, expecially if they have already applied updates 9.3.7, 9.3.8, 9.4.2 or 9.4.3. Database administrators who used pg_upgrade to upgrade to PostgreSQL version 9.3 may find that applying the update causes an immediate autovacuum of their entire database. Please see the [release notes](http://www.postgresql.org/docs/9.4/static/release-9-3-9.html) for details and ways to change the timing of the vacuum. Other Fixes and Improvements ---------------------------- In addition to the above, a few other minor issues were patched in this release. These fixes include: * Prevent failure to invalidate relation cache init file * Avoid deadlock between new sessions and CREATE/DROP DATABASE * Improve query planning for semi-joins and anti-joins * Cumulative Releases ------------------- All PostgreSQL update releases are cumulative. As this update release fixes a number of problems inadvertently introduced by fixes in earlier update releases, we strongly urge users to apply this update, rather than installing less recent updates that have known issues. As this update release closes all known bugs with multixact handling, the PostgreSQL Project does not anticipate additional update releases soon. Updating -------- As with other minor releases, users are not required to dump and reload their database or use pg_upgrade in order to apply this update release; you may simply shut down PostgreSQL and update its binaries. Users who have skipped multiple update releases may need to perform additional post-update steps; see the Release Notes for details. See also the above note for users who used pg_upgrade with PostgreSQL version 9.3. Links: * [Download](http://www.postgresql.org/download) * [Release Notes](http://www.postgresql.org/docs/current/static/release.html)
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