Discards: The total number of messages thrown off the queue.
Floods: The total number of full queue exceptions
Execs: The total number of RPCs executed by this machine node
CtxErrs: Total number of RPC that failed due to a bad execution context being specified
ModErrs: Total number of RPC that failed due to a bad target module name being specified
You may additionally expand each socket line to view more detailed statistics for the individual sockets as shown in the example below:

TxRPC: Total number of RPCs transmitted
RxRPC: Total number of RPCs received
Pings: Total number of pings received
Acks: Total number of acks received
Disc: Total number of times this socket has been lost
Lost: Total number of times communications have irrevocably been lost
Coll: Total number of collisions encountered
Sync: The number of bad sync string errors received
Hdr: The number of bad header errors received
Len: The number of bad length errors received
Pkt: The number of incomplete packet errors received
The Reset button to the far right of each socket statistics line can be clicked to reset the statistics.