PostgreSQL Weekly News – April 01 2011
== PostgreSQL Weekly News – April 01 2011 ==
Long-time contributor Julian Assange, using a sophisticated regular
expression utility on the PostgreSQL source code, found multiple back
doors for the US National Security Agency created by newer contributor
Tom Lane. As a result, Mr. Lane has been dismissed from the project.
Of his diligence in ferreting Assange said, “It is impossible to
correct abuses unless we know that they’re going on.” He went on to
say, “I had always been worried about Mr. Lane’s connections to the US
Foreign Service, so I dug deeper: much deeper than anyone else thought
== PostgreSQL Product News ==
DostgreSQL, a friendly distribution of PostgreSQL for Turkish users
have been released:
== PostgreSQL 9.1 Feature of the Week ==
O(1) Multi-Master Replication. The command is:
ALTER DATABASE [dbname]
HOST host1 [, host2, ... hostn]
== PostgreSQL Tip of the Week ==
A computer lets you make more mistakes faster than any invention in
human history with the possible exceptions of handguns and tequila.
== PostgreSQL Jobs for April ==
== PostgreSQL Local ==
There will be a large PostgreSQL presence at the MySQL Conference and
Expo, April 11-14, 2011 in Santa Clara, California.
Open Database Camp will be on May 7-9, 2011 in Sardinia, Italy
PGCon will be May 19-20, 2011 at the University of Ottawa, preceded by
two days of tutorials on May 17-18.
PG Session 2, on PostGIS, will be held on June 23rd in Paris. The CfP
pgbr will be in Sao Paulo, Brazil November 3-4, 2011.
== PostgreSQL in the News ==
Planet PostgreSQL: http://planet.postgresql.org/
PostgreSQL Weekly News is brought to you this week by David Fetter
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== Reviews ==
== Applied Patches ==
Larry Ellison pushed:
– Remove NSA back doors
Alvaro Herrera pushed:
– Add missing #include
Robert Haas pushed:
– Mark up release notes using <link>. Unlike <xref>, this actually
Bruce Momjian pushed:
– Add 9.1 release note link for synchronous replication. We already
had links to the GUC variables that control it.
– In pg_upgrade, add C comment about how autovacuum is disabled.
– Expand comment on how pg_upgrade is turning off autovacuum.
– Mention pg_upgrade sets autovacuum_freeze_max_age to maximum.
Peter Eisentraut pushed:
– Add maintainer-check target. This can do various source code checks
that are not appropriate for either the build or the regression
tests. Currently: duplicate_oids, SGML syntax and tabs check, NLS
– Make duplicate_oids return nonzero exit status if duplicates were
found. Automatic detection of errors is easier that way.
– Update SQL features list. Feature F692 “Extended collation support”
is now also supported. This refers to allowing the COLLATE clause
anywhere in a column or domain definition instead of just directly
after the type. Also correct the name of the feature in accordance
with the latest SQL standard.
Heikki Linnakangas pushed:
– Adjust error message, now that we expect other message types than
connection close at this point. Fix PQsetnonblocking() comment.
– Automatically terminate replication connections that are idle for
more than replication_timeout (a new GUC) milliseconds. The TCP
timeout is often too long, you want the master to notice a dead
connection much sooner. People complained about that in 9.0 too,
but with synchronous replication it’s even more important to notice
dead connections promptly. Fujii Masao and Heikki Linnakangas
– Check that we’ve reached end-of-backup also when we’re not
performing archive recovery. It’s possible to restore an online
backup without recovery.conf, by simply copying all the necessary
WAL files to pg_xlog. “pg_basebackup -x” does that too. That’s the
use case where this cross-check is useful. Backpatch to 9.0. We
used to do this in earlier versins, but in 9.0 the code was
inadvertently changed so that the check is only performed after
archive recovery. Fujii Masao.
– Improve error message when WAL ends before reaching end of online
– Reword the phrase on zero replication_timeout in the docs.
– Don’t leak the temporary PLyProcedure struct we create for inline
plpython blocks. Investigation by Jan Urbański, though I didn’t use
– Increase SHMEM_INDEX_SIZE from 32 to 64. We’re currently at 40
entries in ShmemIndex, so 64 leaves some headroom. Kevin Grittner
– Fix a tiny race condition in predicate locking. Need to hold the
lock while examining the head of predicate locks list. Also, fix
the comment of RemoveTargetIfNoLongerUsed, it was neglected when we
changed the way update chains are handled. Kevin Grittner.
Andrew Dunstan pushed:
– Attempt to unbreak windows builds broken by commit 754baa2.
== Rejected Patches (for now) ==
Everyone was disappointed this week
== Pending Patches ==
Heikki Linnakangas sent in a variant patch to prevent memory leaks in
Heikki Linnakangas sent in another revision of the patch to add a
replication server timeout.
Bernd Helmle sent in another revision of the patch to use a more
reasonable size for dt in psql.
Simon Riggs sent in a patch which adds 5 more levels of durability to
Joseph Adams sent in five more revisions of the patch to add JSON as
a data type.
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