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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3793) enable numa memory interleaving
Date Mon, 11 May 2015 16:36:00 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14538133#comment-14538133
] 

Josh Elser commented on ACCUMULO-3793:
--------------------------------------

bq. Of course, numactl has to actually be installed on the system, and we could additionally
require a flag to be set before we prefix our command (if we didn't want to execute with numactl
by default... though I can't see much of a downside)

You'll be breaking OSX (as it appears that it doesn't exist there. I would personally be upset
if I suddenly have to install new software to (continue) running Accumulo. This sounds like
it should be an option which can be enabled via accumulo-env.sh.

> enable numa memory interleaving
> -------------------------------
>
>                 Key: ACCUMULO-3793
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3793
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: scripts
>         Environment: Large VM
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>             Fix For: 1.6.3, 1.8.0, 1.7.1
>
>
> In this [fine article|http://tinyurl.com/m8lt7v2] it is recommended that NUMA optimizations
be disabled. This seems to be exactly our use-case as well, and we have been struggling with
ways to manage the linux page cache on large production systems.  Do this by default in the
start scripts.



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