pgsql: Fix off-by-one error in autovacuum shmem struct sizing.

From: heikki(at)postgresql(dot)org (Heikki Linnakangas)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix off-by-one error in autovacuum shmem struct sizing.
Date: 2008-11-12 10:10:32
Message-ID: 20081112101032.92B717545A4@cvs.postgresql.org
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Log Message:
-----------
Fix off-by-one error in autovacuum shmem struct sizing. This could lead to
autovacuum worker sending SIGUSR1 signal to wrong process, per Zou Yong's
report.

Backpatch to 8.3.

Modified Files:
--------------
pgsql/src/backend/postmaster:
autovacuum.c (r1.86 -> r1.87)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/autovacuum.c?r1=1.86&r2=1.87)

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