Comment 2 for bug 1472251

5.1 looks good:

#define REFRESH_TABLE_STATS 256 /* Refresh table stats hash table */
#define REFRESH_INDEX_STATS 512 /* Refresh index stats hash table */
#define REFRESH_USER_STATS 1024 /* Refresh user stats hash table */
#define REFRESH_SLOW_QUERY_LOG 2048 /* Flush slow query log and rotate*/
#define REFRESH_CLIENT_STATS 4096 /* Refresh client stats hash table */
#define REFRESH_THREAD_STATS 8192 /* Refresh thread stats hash table */

/* The following can't be set with mysql_refresh() */
#define REFRESH_READ_LOCK 16384 /* Lock tables for read */
#define REFRESH_FAST 32768 /* Intern flag */

/* RESET (remove all queries) from query cache */
#define REFRESH_QUERY_CACHE 65536
#define REFRESH_QUERY_CACHE_FREE 0x20000L /* pack query cache */
#define REFRESH_DES_KEY_FILE 0x40000L
#define REFRESH_USER_RESOURCES 0x80000L
#define REFRESH_QUERY_RESPONSE_TIME 0x100000L /* response time distibution */
#define REFRESH_FLUSH_PAGE_BITMAPS 0x200000L
#define REFRESH_RESET_PAGE_BITMAPS 0x400000L