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https://issues.apache.org/jira/browse/HADOOP-7832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757350#comment-13757350
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Manu Zhang commented on HADOOP-7832:
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Thanks Cristina. I've applied all the patches in HADOOP-7714 and resolve
conflicts when applying them. I can see some "Loaded file ... 100.0% of its 4k
pages where found in OS page cache" (TaskTracker) but the "ENOMEM" WARN still
happens. But not between "Loaded block..." (BlockSender). BTW, where should I
look for "Loaded IFile..."?
> Using mincore to understand the effect of fadvise in the Linux page cache
> -------------------------------------------------------------------------
>
> Key: HADOOP-7832
> URL: https://issues.apache.org/jira/browse/HADOOP-7832
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: io, native, performance
> Reporter: Cristina L. Abad
> Priority: Minor
> Attachments: hadoop-7714-20s-205-mincore.txt
>
>
> This Jira adds a way to log the percentage of pages of a file that were on
> the Linux page cache (when the file is being opened) with the purpose of
> measuring the effect of issuing posix_fadvise (POSIX_FADV_DONTNEED) calls.
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