Exchange 2010 copy queue length?

 https://social.technet.microsoft.com/Forums/exchange/en-US/f3b6dd25-8362-48c6-9a4a-facd18c55f99/exchange-2010-copy-queue-length

Copy queue length (logs)   Indicates the number of log files waiting to be copied and inspected.

Replay queue length (logs)   Indicates the number of log files waiting to be replayed into this copy of the database.