I am looking at some hadoop tuning parameters like io.sort.mb,
mapred.child.javaopts etc.

- My question was where to look at for current setting
- Are these settings configured cluster wide or per job?
- What's the best way to look at reasons of slow performance?

Use a search engine to find the Hadoop best practices blog by Arun Murthy.

Sriram

On Feb 24, 2012, at 10:36 PM, Mohit Anchlia <[EMAIL PROTECTED]> wrote:

> I am looking at some hadoop tuning parameters like io.sort.mb,
> mapred.child.javaopts etc.
>
> - My question was where to look at for current setting
> - Are these settings configured cluster wide or per job?
> - What's the best way to look at reasons of slow performance?