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https://issues.apache.org/jira/browse/IGNITE-2389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Tupitsyn updated IGNITE-2389:
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Fix Version/s: (was: 1.7)
1.8
> Need to add ability to swap the queue if it's too long
> ------------------------------------------------------
>
> Key: IGNITE-2389
> URL: https://issues.apache.org/jira/browse/IGNITE-2389
> Project: Ignite
> Issue Type: Improvement
> Components: data structures
> Reporter: Valentin Kulichenko
> Fix For: 1.8
>
>
> In some cases there can be a requirement to start swapping new queue elements
> to avoid out of memory errors. For example, if the consumer temporarily
> stopped for some reason, but the producer still adds elements.
> We can do this based on cache swap space and evictions. I think we should:
> # Add max allowed in-memory elements property to {{CollectionConfiguration}}.
> We can also support limit by memory size.
> # Implement special eviction policy that will evict new queue elements if
> limits are reached.
> # Automatically unswap latest elements when consumer resumes polling (can be
> achieved by a background process).
> In case of {{IgniteSet}}, limits should be also honored, but here we don't
> have ordering. So I think we can use our standard LRU, but make sure that
> only elements are swapped. Header and other meta objects should be always in
> memory.
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