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Date: Tue, 10 Nov 2009 01:29:32 +0000 (UTC)
From: "Scott Chen (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Updated: (MAPREDUCE-1167) Make ProcfsBasedProcessTree
 collect rss memory information
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-1167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Scott Chen updated MAPREDUCE-1167:
----------------------------------

    Attachment: MAPREDUCE-1167-v3.patch

1. Rename rssmem to rssmemPage to help clarify.
2. Throws Exception when PAGESIZE is not available.

@Vinod: After reviewing the code, I think it is better to use page number in ProcessInfo because ProcessInfo is simply a parsed version of /proc/PID directory. It should be consistent with what's in /proc. I changed the field's name from rssmem to rssmemPage and also the getters' names. I think this should be able to help clarify. Also ProcessInfo is a private class. I think as long as our public methods all use bytes it should be fine.

> Make ProcfsBasedProcessTree collect rss memory information
> ----------------------------------------------------------
>
>                 Key: MAPREDUCE-1167
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1167
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: tasktracker
>    Affects Versions: 0.20.1
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>         Attachments: MAPREDUCE-1167-v2.patch, MAPREDUCE-1167.patch
>
>
> Right now ProcfsBasedProcess collects only virtual memory. We can make it collect rss memory as well.
> Later we can use rss in TaskMemoryManagerThread to obtain better memory management.

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