August 2022
Intermediate to advanced
974 pages
26h 5m
English
Content preview from MySQL Cookbook, 4th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 23. Monitoring the MySQL Server
23.0 Introduction
This chapter covers how to monitor the MySQL server using various command-line tools:
The
mysqladmininterfaceSystem variables
Status variables
Information and Performance Schemas
Storage engines diagnostics
Logfiles
This chapter doesn’t cover managing administrative tasks. Instead, it focuses on the server’s observability. Administrators or developers should evaluate outcomes from various command-line tools on the MySQL server carefully before taking action and modifying configuration changes listed in Chapter 22. Rather, this chapter discusses what you can find out, and how, by surveying the types of information available and how to use that information to answer questions. The purpose is not so much to consider specific monitoring problems, but to illustrate your options so you can begin to answer your questions, whatever they are. In the case of reactive monitoring on an issue, follow one of the following options:
Determine which of the available information sources pertain to the problem at hand.
Choose an approach for using the information: Are you asking a one-time question? If so, maybe a few interactive queries are sufficient. If you’re trying to solve an issue that may recur or for which you need continuous monitoring, a program-oriented approach is better. Will a script written entirely in SQL do the job, or do you need to write a program that queries the server and performs additional manipulation of the information obtained? ...
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