Book Image

Nginx Troubleshooting

By : Alexey Kapranov
Book Image

Nginx Troubleshooting

By: Alexey Kapranov

Overview of this book

Nginx is clearly winning the race to be the dominant software to power modern websites. It is fast and open source, maintained with passion by a brilliant team. This book will help you maintain your Nginx instances in a healthy and predictable state. It will lead you through all the types of problems you might encounter as a web administrator, with a special focus on performance and migration from older software. You will learn how to write good configuration files and will get good insights into Nginx logs. It will provide you solutions to problems such as missing or broken functionality and also show you how to tackle performance issues with the Nginx server. A special chapter is devoted to the art of prevention, that is, monitoring and alerting services you may use to detect problems before they manifest themselves on a big scale. The books ends with a reference to error and warning messages Nginx could emit to help you during incident investigations.
Table of Contents (15 chapters)
Nginx Troubleshooting
About the Author
About the Reviewers
Rare Nginx Error Messages

Using ngxtop

When the first version of the famous Unix utility top(1) was conceived in 1984, imitating an old VMS command that did a similar thing, the author was unlikely to imagine that he actually created a whole class of online system administration tools suited for both routine and emergency situations. Since then, top has become an essential program, and many other utilities have been born with the same principle in mind—produce a dynamic interactive top N list of items sorted by a particular criteria. There are htop, iotop, mytop, pg_top, ntop, iftop, and many others. The Nginx ecosystem has its own top, which is named ngxtop and is hosted on

The recommended way to install ngxtop is using the pip package manager for Python packages. Your distribution may or may not have pip installed by default, so you might also need to install pip first. On Debian-based Linux distributions, you will usually be all set up with:

$ sudo apt-get install python-pip