pgsql: Fix corner-case bug in tracking of latest removed WAL segment du

From: Heikki Linnakangas <heikki(dot)linnakangas(at)iki(dot)fi>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix corner-case bug in tracking of latest removed WAL segment du
Date: 2010-11-01 08:16:04
Message-ID: E1PCpYi-0004ro-Fb@gemulon.postgresql.org
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Fix corner-case bug in tracking of latest removed WAL segment during
streaming replication. We used log/seg 0/0 to indicate that no WAL segments
have been removed since startup, but 0/0 is a valid value for the very first
WAL segment after initdb. To make that disambiguous, store
(latest removed WAL segment + 1) in the global variable.

Per report from Matt Chesler, also reproduced by Greg Smith.

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=931b6db39b808608a3c80c42b47e3cbcda9e66db

Modified Files
--------------
src/backend/access/transam/xlog.c | 9 ++++++---
src/backend/replication/walsender.c | 2 +-
2 files changed, 7 insertions(+), 4 deletions(-)

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