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https://issues.apache.org/jira/browse/IGNITE-6182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16145044#comment-16145044
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Igor Seliverstov commented on IGNITE-6182:
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The final version of warning based on disscussion on devlist:
{noformat}
-----------------------------------------------------
Excessive memory usage by Ignite node process (performance may drop)
[requested=44613MB, available=15942MB].
Please tune the folowing settings as suggested:
MemoryPolicyConfiguration.initialSize for bigPlc: 8102MB
MemoryPolicyConfiguration.maxSize for bigPlc: 8102MB
MemoryPolicyConfiguration.initialSize for dfltPlc: 100MB
MemoryPolicyConfiguration.maxSize for dfltPlc: 100MB
Current settings:
Java Heap maxSize: 3543MB
Java Heap initSize: 250MB
MemoryPolicyConfiguration.initialSize for bigPlc: 256MB
MemoryPolicyConfiguration.maxSize for bigPlc: 40960MB
MemoryPolicyConfiguration.initialSize for dfltPlc: 10MB
MemoryPolicyConfiguration.maxSize for dfltPlc: 10MB
The overall expected memory usage by all Ignite nodes on the host: 44613MB
-----------------------------------------------------
{noformat}
> Change default max memory size from 80% to 20%
> ----------------------------------------------
>
> Key: IGNITE-6182
> URL: https://issues.apache.org/jira/browse/IGNITE-6182
> Project: Ignite
> Issue Type: Task
> Components: general
> Affects Versions: 2.1
> Reporter: Vladimir Ozerov
> Assignee: Igor Seliverstov
> Priority: Blocker
> Fix For: 2.2
>
>
> Currently we can allocate up to 80% of available RAM by default. It could
> lead to swap with potential risk of hang.
> In order to improve user experience, we need to do the following:
> 1) Decrease default to 20%
> ({{MemoryConfiguration.DFLT_MEMORY_POLICY_FRACTION}})
> 2) When node starts it should sum max sizes of all memory regions plus Java's
> XMX. If result is greater than 50% of total RAM, we should issue a warning
> about potential swap.
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