title: Is there any limit on the number of arguments that redis commands such as ZADD or HMGET can handle?
body: <p>I'd like to use single ZADD or HMGET commands instead of a MULTI/EXEC. </p>
  
  <p>Is there any limit on the number of (score, member) tuples that ZADD can handle?</p>
  
  <p>Is there any limit on the number of fields that HMGET can handle?</p>