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From: Shaomin Zhang <Shaomin.Zhang@tudor.com>
To: "user@ignite.apache.org" <user@ignite.apache.org>
Subject: Off-heap memory usage questions
Thread-Topic: Off-heap memory usage questions
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Date: Thu, 14 Apr 2016 13:24:26 +0000
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Hi

I am trying to use OFFHEAP_TIERED caches, and have this setting for the mem=
ory <property name=3D"offHeapMaxMemory" value=3D"#{10 * 1024L * 1024L * 102=
4L}"/>, 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? W=
hat 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 th=
e all the Ignite JMVs on the single hardware node or for the whole cluster =
composed of server hardware nodes?


Thanks

Shaomin

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