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sungiant's questions

Martin Hope
sungiant
Asked: 2014-07-03 01:45:40 +0800 CST
  • 1

I had a number of 12.10 machines running on EC2 and provisioned them using scripts built around:

  • ssh
  • scp
  • rsync

Now I have replaced most of my 12.10 machines with 14.04 machine and am finding that my provisioning scripts now run prohibitively slowly whilst executing the same remote commands.

An example of a remote command being used is:

ssh -o StrictHostKeyChecking=no -o BatchMode=yes -p22 -i /Users/.ssh/ec2_key.pem [email protected] "sudo /etc/init.d/redis-server status"

This will execute very quickly on my 12.10 machines, maximum 3 seconds delay, however the same command on the 14.04 machines can take upwards of 60 seconds.

Does anyone know what the problem is?

Watching the machine through htop whilst running a remote command indicates that the problem is somehow related to the message of the day:

enter image description here

12.10
Martin Hope
sungiant
Asked: 2012-11-28 02:25:44 +0800 CST
  • 305

I have a fresh install of Ubuntu 12.04.1 LTS an a number of servers.

I have not added any cron jobs or edited my crontab on those servers, however, at around the same time for each machine, I get a 75% CPU spike and the following info in my syslog at the time of the spike:

CRON[8380]: (CRON) info (No MTA installed, discarding output)

I have mono-complete installed and am running a service stack webserver.

What is the best way for me to stop this from happening? I would like to be able to remove the CPU spike.

cron