Reorder LOCALLOCK structure members to compact the size

Save 8 bytes (on x86-64) by filling up padding holes.

Author: Takayuki Tsunakawa <tsunakawa.takay@jp.fujitsu.com>
Discussion: https://www.postgresql.org/message-id/20190219001639.ft7kxir2iz644alf@alap3.anarazel.de

diff --git a/src/include/storage/lock.h b/src/include/storage/lock.h
index 16b927cb801d4d60382f780c2c8a8ac6fe409ad8..badf7fd682b3d8ef9f8851f4d6b0dc386a3eac6e 100644 (file)
--- a/src/include/storage/lock.h
+++ b/src/include/storage/lock.h
@@ -404,15 +404,15 @@ typedef struct LOCALLOCK
        LOCALLOCKTAG tag;                       /* unique identifier of locallock entry */
 
        /* data */
+       uint32          hashcode;               /* copy of LOCKTAG's hash value */
        LOCK       *lock;                       /* associated LOCK object, if any */
        PROCLOCK   *proclock;           /* associated PROCLOCK object, if any */
-       uint32          hashcode;               /* copy of LOCKTAG's hash value */
        int64           nLocks;                 /* total number of times lock is held */
-       bool            holdsStrongLockCount;   /* bumped FastPathStrongRelationLocks */
-       bool            lockCleared;    /* we read all sinval msgs for lock */
        int                     numLockOwners;  /* # of relevant ResourceOwners */
        int                     maxLockOwners;  /* allocated size of array */
        LOCALLOCKOWNER *lockOwners; /* dynamically resizable array */
+       bool            holdsStrongLockCount;   /* bumped FastPathStrongRelationLocks */
+       bool            lockCleared;    /* we read all sinval msgs for lock */
 } LOCALLOCK;
 
 #define LOCALLOCK_LOCKMETHOD(llock) ((llock).tag.lock.locktag_lockmethodid)