O'Reilly logo

Release It! by Michael T. Nygard

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Vital Signs

The incident had started about twenty minutes before Daniel called me. The operations center had escalated to the on-site team. David, the operations manager, had made the choice to bring me in as well.

Too much was on the line for our client to worry about interrupting a vacation day. Besides, I had told them not to hesitate to call me if I was needed.

We knew a few things at this point, twenty minutes into the incident:

  • Session counts were very high, higher than the day before.

  • Network bandwidth usage was high but not hitting a limit.

  • Application server page latency (response time) was high.

  • Web, application, and database CPU usage were low—really low.

  • Search servers, our usual culprit, were responding well. System stats looked ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required