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MySQL Performance

When MySQL ignores histograms?

MySQL can ignore histograms in the query optimizer when it determines that using the histograms would not provide any benefit to the query execution plan. This can occur in several cases, including: Why MySQL ignores […]

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MySQL Troubleshooting

Troubleshooting Mutex Contention in MySQL

Mutex contention occurs in MySQL when multiple threads attempt to access a shared resource, such as a data structure or a system resource, simultaneously. Because only one thread can access the resource at a time, […]

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MinervaDB

Troubleshooting Table I/O with SYS Schema in MySQL 8

MySQL 8 performance monitoring helps proactive troubleshooting by providing real-time data and insights into the performance of the database system. By monitoring performance, administrators can proactively identify and resolve potential performance issues before they become […]

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MySQL Performance

How to implement multicolumn index in MySQL 8

To implement a multi-column index in MySQL 8, you need to create an index that includes multiple columns in the index definition. The order of the columns in the index definition is important, as it […]