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From Stack <st...@duboce.net>
Subject Re: write performance degradation
Date Sun, 30 Jan 2011 22:59:19 GMT
On Sun, Jan 30, 2011 at 5:49 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> RC3 was promoted to 0.90 release, so I didn't expect much difference.

Pardon me.  You are right.

> Here is output from top on one node:
>
> top - 22:42:26 up 104 days, 20:38,  1 user,  load average: 1.04, 1.34, 2.13

Load is low.


> Tasks: 152 total,   1 running, 151 sleeping,   0 stopped,   0 zombie
> Cpu(s):  0.5%us,  0.2%sy,  0.0%ni, 98.8%id,  0.0%wa,  0.0%hi,  0.4%si,
> 0.0%st
> Mem:  16440036k total, 15532616k used,   907420k free,    42472k buffers
> Swap: 16777208k total,  5719488k used, 11057720k free,  4530368k cached
>

Is this swap active?  Are you swapping?

Regards the rest, its hard to offer advice based off a single
snapshot.  Do you have ganglia up and running on this cluster?

St.Ack

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