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From Dmitriy Setrakyan <dsetrak...@apache.org>
Subject Re: Enable/disable cache statistics in runtime
Date Wed, 29 Nov 2017 21:58:22 GMT
On Wed, Nov 29, 2017 at 12:22 PM, Alex Plehanov <plehanov.alex@gmail.com>

> Hello, Igniters!
> We need the ability to enable or disable statistics for caches in runtime.
> For now, there is a cache configuration property which seems modifiable in
> runtime and this, at first sight, works for local node. But there are no
> methods to enable or disable statistics for cache cluster wide.
> So, I propose:
> Create a new JMX operation in
> CacheClusterMetricsMXBeanImpl/CacheLocalMetricsMXBeanImpl
> to enable/disable statistics for cache. When invoked, operation must set
> statisticsEnabled flag in cache configurations. Then send a new type of
> DiscoveryCustomMessage, which will set this flag for cache on other nodes
> in cluster.
> Do you have objections to this solution?

Why do we need a discovery message? A simple cluster broadcast should do.

I think it makes sense to make this solution generic enough, so other JMX
metrics could be enabled/disabled using the same mechanism.


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