Set REDIS_AOF_REWRITE_MIN_SIZE to 64mb.

64mb is the default value in redis.conf. For some reason instead the
hard-coded default was 1mb that is too small.

src/redis.h

@@ -81,7 +81,7 @@
 #define REDIS_SHARED_BULKHDR_LEN 32
 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
 #define REDIS_AOF_REWRITE_PERC  100
-#define REDIS_AOF_REWRITE_MIN_SIZE (1024*1024)
+#define REDIS_AOF_REWRITE_MIN_SIZE (64*1024*1024)
 #define REDIS_AOF_REWRITE_ITEMS_PER_CMD 64
 #define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
 #define REDIS_SLOWLOG_MAX_LEN 128