innotop is a ‘top’ clone for MySQL with many features and flexibility.
Each of its modes shows you a different aspect of what’s happening in the server. For example, there’s a mode for monitoring replication, one for queries, and one for transactions. innotop refreshes its data periodically, so you see an updating view.
innotop has lots of features for power users, but you can start and run it with virtually no configuration.
innotop is mostly configured via its configuration file, but some of the configuration options can come from the command line.
innotop is free and open source software.
Features include:
- Completely customizable.
- Different modes:
- Health Dashboard – displays a single table with one row per monitored server. The columns show essential overview information about the server’s health, and coloration rules show whether replication is running or if there are any very long-running queries or excessive replication delay.
- InnoDB Buffers – displays information about the InnoDB buffer pool, page statistics, insert buffer, and adaptive hash index.
- Command Summary – similar to mytop’s Command Summary mode. It shows the “cmd_summary” table.
- InnoDB Deadlocks – shows the transactions involved in the last InnoDB deadlock. A second table shows the locks each transaction held and waited for. A deadlock is caused by a cycle in the waits-for graph, so there should be two locks held and one waited for unless the deadlock information is truncated.
- InnoDB Foreign Key Errors – shows the last InnoDB foreign key error information, such as the table where it happened, when and who and what query caused it, and so on.
- InnoDB I/O Info – shows InnoDB’s I/O statistics, including the I/O threads, pending I/O, file I/O miscellaneous, and log statistics. It displays the “io_threads”, “pending_io”, “file_io_misc”, and “log_statistics” tables by default.
- InnoDB Lock Waits – shows information from InnoDB plugin’s transaction and locking tables. You can use it to find when a transaction is waiting for another, and kill the blocking transaction. It displays the “innodb_blocked_blocker” table.
- Locks – shows information about current locks. At the moment only InnoDB locks are supported, and by default you’ll only see locks for which transactions are waiting.
- Master/Slave Replication Status – shows the output of SHOW SLAVE STATUS and SHOW MASTER STATUS in three tables.
- Open Tables – comes from MySQL’s SHOW OPEN TABLES command.
- User Statistics – displays data that’s available in Percona’s enhanced version of MySQL (also known as Percona Server with XtraDB).
- Query List – displays the output from SHOW FULL PROCESSLIST , much like mytop’s query list mode. This mode does not show InnoDB-related information.
- InnoDB Row Operations and Semaphores – shows InnoDB row operations, row operation miscellaneous, semaphores, and information from the wait array.
- Variables & Status – calculates statistics, such as queries per second, and prints them out in several different styles. You can show absolute values, or incremental values between ticks.
- InnoDB Transactions – shows transactions from the InnoDB monitor’s output, in top-like format.
- Limited support for managing servers.
- View any status variables how changing in real time.
- Plugin interface.
- Support for MySQL 8.0, MariaDB 10.0 has been added.
- Monitors many servers simultaneously and can aggregate across them. Server groups functionality. From the defined connections, you can easily configure groups and for almost each view mode – you can either choose a single connection or a group.
Website: github.com/innotop/innotop
Support:
Developer: Kenny Gryp, Frédéric Descamps (original developer Baron Schwartz)
License: GNU General Public License v2.0
innotop is written in Perl. Learn Perl with our recommended free books and free tutorials.
| Popular series | |
|---|---|
 | The largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions. |
 | Hundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information. |
 | Replace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS. |
 | Awesome Free Linux Games Tools showcases a series of tools that making gaming on Linux a more pleasurable experience. This is a new series. |
 | Machine Learning explores practical applications of machine learning and deep learning from a Linux perspective. We've written reviews of more than 40 self-hosted apps. All are free and open source. |
 | New to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux. |
 | Alternatives to popular CLI tools showcases essential tools that are modern replacements for core Linux utilities. |
 | Essential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users. |
 | Linux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine. |
 | Surveys popular streaming services from a Linux perspective: Amazon Music Unlimited, Myuzi, Spotify, Deezer, Tidal. |
 | Saving Money with Linux looks at how you can reduce your energy bills running Linux. |
 | Home computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum. |
 | Now and Then examines how promising open source software fared over the years. It can be a bumpy ride. |
 | Linux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged. |
 | Linux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery. |
 | Getting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers. |
 | Best Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series. |
 | These best free books accelerate your learning of every programming language. Learn a new language today! |
 | These free tutorials offer the perfect tonic to our free programming books series. |
 | Linux Around The World showcases usergroups that are relevant to Linux enthusiasts. Great ways to meet up with fellow enthusiasts. |
 | Stars and Stripes is an occasional series looking at the impact of Linux in the USA. |