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https://issues.apache.org/jira/browse/IGNITE-6182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16152644#comment-16152644
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Sergey Kozlov edited comment on IGNITE-6182 at 9/4/17 2:39 PM:
---------------------------------------------------------------
Guys
I just have checked it and found that the warning is not clear yet. I started 3
nodes and the thitd node printed out:
{noformat}
16:51:21] Attempting to start more nodes than physical RAM available on the
host what can lead to significant slowdown
please decrease JVM heap size, memory policy size or checkpoint buffer size)
[required=13002MB, available=16260MB]
{noformat}
Why the required size is less than the available size but node is still warning?
was (Author: skozlov):
Guys
I just have checked it and found that the warning is not clear yet. I started 3
nodes and thrid node prined out:
{noformat}
16:51:21] Attempting to start more nodes than physical RAM available on the
host what can lead to significant slowdown
please decrease JVM heap size, memory policy size or checkpoint buffer size)
[required=13002MB, available=16260MB]
{noformat}
Why the required size is less than the available size but node is still warning?
> 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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