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From Shaomin Zhang <Shaomin.Zh...@tudor.com>
Subject Off-heap memory usage questions
Date Thu, 14 Apr 2016 13:24:26 GMT

I am trying to use OFFHEAP_TIERED caches, and have this setting for the memory <property
name="offHeapMaxMemory" value="#{10 * 1024L * 1024L * 1024L}"/>, virtual memory is disenabled.
I have a couple questions:

1. Does this mean that 10G off-heap memory is allocated for each cache? If I have two Ignite
instances on a single hard node, 20G will be allocated? What if there is not enough memory
(REM) ?
2. I am using CacheMetrics. getOffHeapAllocatedSize() to report the size of the off-heap memory
used. Is the reported value for the single JVM, for the all the Ignite JMVs on the single
hardware node or for the whole cluster composed of server hardware nodes?




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