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From "Anton Vinogradov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-6182) Change default max memory size from 80% to 20%
Date Thu, 31 Aug 2017 16:18:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-6182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16149196#comment-16149196
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Anton Vinogradov commented on IGNITE-6182:
------------------------------------------

[~gvvinblade],

Code you provided can't be compiled, please fix.

> 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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