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

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
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master

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

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