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.

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index fd1489947f002cefaad73ba2ff98942d8c4d47fa..c85ad81a8e9194e532b16a9e9756206ed32e8aab 100644 (file)
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -55,7 +55,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.86 2008/11/03 19:03:41 alvherre Exp $
+ *   $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.87 2008/11/12 10:10:32 heikki Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -222,7 +222,7 @@ typedef enum
 {
    AutoVacForkFailed,          /* failed trying to start a worker */
    AutoVacRebalance,           /* rebalance the cost limits */
-   AutoVacNumSignals = AutoVacRebalance        /* must be last */
+   AutoVacNumSignals           /* must be last */
 } AutoVacuumSignal;
 
 /*-------------