max repl throughput galera

SET GLOBAL wsrep_desync=on;
FLUSH TABLES WITH READ LOCK;
...wait until the queue rises to be quite high, about 20.000
UNLOCK TABLES; use test;
SELECT sum(trx) as transactions, sum(duration) as time, 
    IF(sum(duration) < 5, 'DID NOT TAKE LONG ENOUGH TO BE ACCURATE', 
      ROUND(SUM(trx)/SUM(duration))) 
        AS transactions_per_second 
FROM
  (SELECT VARIABLE_VALUE * -1 AS trx, null as duration
        FROM information_schema.GLOBAL_STATUS
        WHERE VARIABLE_NAME = 'wsrep_last_committed'
    UNION ALL
        SELECT null as trx, galeraWaitUntilEmptyRecvQueue() AS duration
    UNION ALL
        SELECT VARIABLE_VALUE AS trx, null as duration
        FROM information_schema.GLOBAL_STATUS
        WHERE VARIABLE_NAME = 'wsrep_last_committed'
    ) AS COUNTED;