IgniteConfiguration: UtilityCachePoolSize and UtilityCacheKeepAliveTime

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IgniteConfiguration: UtilityCachePoolSize and UtilityCacheKeepAliveTime

Alexey Kuznetsov-2
Ignites,

Could anybody give a short description about IgniteConfiguration:
UtilityCachePoolSize and UtilityCacheKeepAliveTime properties.

What for we need them?

Javadocs says: "Keep alive time of thread pool size that will be used to
process utility cache messages."

What is this  "utility cache messages"?
When I need to change this settings? (possible use cases).

I need to know this as a part of my work on IGNITE-843 Web Control Center,
to add this settings on UI or not and if yes then I need to show
informative description to user what for this property is.

Thanks.

--
Alexey Kuznetsov
GridGain Systems
www.gridgain.com