On Wed, Sep 1, 2010 at 7:24 AM, Matthew LeMieux <[email protected]> wrote:
> I'm starting to find that EC2 is not reliable enough to support HBase. I'm > running into 2 things that might be related: > > 1) On idle machines that are apparently doing nothing (reports of <3% CPU > utilization, no I/O wait) the load is reported as being higher than the > number of cores. I don't know if attachments work on the mailing list, but > I attached a small image anyway to illustrate this confusing thing. (I've > been using m1.large and m2.xlarge running CDH3) > > If you're using AMIs based on the latest Ubuntu (10.4), theres a known kernel issue that seems to be causing high loads while idle. More info here: https://bugs.launchpad.net/ubuntu/+source/linux-ec2/+bug/574910 It's possible other distros running 2.6.32 may be showing the same problem as well.
