Hi Shaomin, 1. Yes, this is a per node setting. So if there are two nodes on one box, it's possible that 20G will be allocated on this box. You should make sure that this limit correlates with the amount of physical memory you have. 2. In 1.5. IgniteCache.metrics() return values for local node only, but you can use IgniteCache.metrics(ClusterGroup) to get aggregated values for a set of nodes. This is already fixed in master - in 1.6 aggregated metrics will be returned by default.
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