Hello! It is still a problem for you? I can see slight decrease of fill factor on your chart coupled with slight increase of data region usage. With regards to fragmentation it is to be expected.
I have tried your test: 15:04:54,356 INFO [grid-timeout-worker-#23] Metrics for local node (to disable set 'metricsLogFrequency' to 0) ^-- Node [id=14b5701b, uptime=00:01:00.014] ^-- PageMemory [pages=6157] ^-- Heap [used=105MB, free=69.72%, comm=350MB] ^-- Non heap [used=62MB, free=-1%, comm=65MB] Then, ten minutes later: 15:15:54,402 INFO [grid-timeout-worker-#23] Metrics for local node (to disable set 'metricsLogFrequency' to 0) ^-- Node [id=14b5701b, uptime=00:12:00.058] ^-- PageMemory [pages=6212] ^-- Heap [used=230MB, free=34.11%, comm=350MB] ^-- Non heap [used=67MB, free=-1%, comm=68MB] Regards, -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/