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From Stack <st...@duboce.net>
Subject Re: scanner deadlock?
Date Wed, 14 Sep 2011 15:47:25 GMT
On Wed, Sep 14, 2011 at 8:42 AM, Geoff Hendrey <ghendrey@decarta.com> wrote:
> 17 MR nodes, 8 reducers per machine = 138 concurrent reducers.
> (machines are 12-core, and I've found 8 reducers with 1GB allocated heap to be a happy
medium that doesn't freeze out the data nodes or the region servers - or so I think :-).
>

Are you swapping at all?

What if you restored your config. to something sane -- 100 handlers
with queue size of 10, default timeout -- with 1/4 of the reducers?

What does this MR job do?

St.Ack

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