Hello,  Please give this command a try:  # isi statistics client --nodes X --zero  This would not suppress the zero value results showing you your inactive clients. I hope this helps!
When in InsightIQ on a given cluster it shows Connected clients as 3.4K , active clients are listed as 595. When I dump the connections via CLI "isi statistics client --nodes X"  The count comes out close to the active clients. 
How do I display inactive isilon clients clients