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This article will explain in detail how to use the monitoring script for Mysql index. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

On variable: off by default, it creates several HASH tables in memory

Set global userstat=on

Set global thread_statistics=on

Check the index usage: you can determine whether the index is used or not

Select * from t where c1, and c2, and c5, order by c2, c3

SELECT * FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t' and table_schema='test'

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| | TABLE_SCHEMA | TABLE_NAME | INDEX_NAME | ROWS_READ | |

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| | test | t | idx_t_c1 | 18 | |

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ROWS_READ: the number of rows accessed from the index, which is a cumulative value

This is the end of this article on "how to use monitoring scripts for Mysql indexes". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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