Hi I've found that heap size of client nodes used in total size of grid heap size:
[11:35:56,444][INFO][main][GridDiscoveryManager] Topology snapshot [ver=4, servers=4, clients=0, CPUs=4, heap=8.0GB] [11:36:04,556][INFO][disco-event-worker-#45%null%][GridDiscoveryManager] Added new node to topology: TcpDiscoveryNode [id=3cc4213b-b4a7-4f45-88b3-07cbdc3488b6, addrs=[0:0:0:0:0:0:0:1, 127.0.0.1, 192.168.100.10], sockAddrs=[ksm-homepc/169.254.90.143:0, /0:0:0:0:0:0:0:1:0, /127.0.0.1:0, /192.168.100.10:0], discPort=0, order=5, intOrder=5, lastExchangeTime=1441960564491, loc=false, ver=1.4.0#20150910-sha1:071586e2, isClient=true] [11:36:04,558][INFO][disco-event-worker-#45%null%][GridDiscoveryManager] Topology snapshot [ver=5, servers=4, clients=1, CPUs=4, heap=9.0GB] But really only server nodes heap used for a grid and it might confuse the user for available heap on grid if a topology has a few server nodes and many clients. -- Sergey Kozlov
