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Community ▶ Questions ▶ High disk io rate
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High disk io rate

performance

Hi,

I get emails about high disk i/o rate every so often. This is the most recent one:

Your Linode has exceeded the notification threshold (5000) for disk io rate by averaging 6247.02 for the last 2 hours.

I always check iotop after getting them and everything seems fine. I also set up a cron job to log iotop every 10 minutes and still don't see anything irregular reported. I've been googling around and can't seem to be able to nail down what's causing it. I have the Linode 2GB plan.

Any ideas?

Thanks!

1 Reply

Check the graphs in the Linode manager to see if it is continuous. I usually get one every month when a full backup is generated and uploaded to Amazon S3. When my nightly incremental backups happen I don't get them. There is probably a process that runs on your Linode as a set interval that sets them off. The Linode notices are mostly there to ensure you're aware that something COULD be wrong (or maybe your site got really popular or something) and you might have to increase your plan size. It doesn't mean something is wrong. If you get these emails frequently you can change the trigger level in the Linode manager.

Back when I had a 512 Linode I used to get them when one of my cron processes would overlap and the whole Linode would spiral into unusefulness.

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