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-rw-r--r--src/bin/pg_resetxlog/pg_resetxlog.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/bin/pg_resetxlog/pg_resetxlog.c b/src/bin/pg_resetxlog/pg_resetxlog.c
index 8671c0a4a3d..d11280e1d4d 100644
--- a/src/bin/pg_resetxlog/pg_resetxlog.c
+++ b/src/bin/pg_resetxlog/pg_resetxlog.c
@@ -492,7 +492,8 @@ GuessControlValues(void)
*/
gettimeofday(&tv, NULL);
sysidentifier = ((uint64) tv.tv_sec) << 32;
- sysidentifier |= (uint32) (tv.tv_sec | tv.tv_usec);
+ sysidentifier |= ((uint64) tv.tv_usec) << 12;
+ sysidentifier |= getpid() & 0xFFF;
ControlFile.system_identifier = sysidentifier;