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https://dev.mysql.com/doc/refman/8.0/en/not-enough-file-handles.html
If you get ERROR 'file_name' not found (errno: 23), Can't open file: file_name (errno: 24), or any other error with errno 23 or errno 24 from MySQL, it means that you have not allocated enough file descriptors for the MySQL server. You can either ...
https://dev.mysql.com/doc/refman/8.0/en/optimization-indexes.html
The best way to improve the performance of SELECT operations is to create indexes on one or more of the columns that are tested in the query. The index entries act like pointers to the table rows, allowing the query to quickly determine which rows ...
https://dev.mysql.com/doc/refman/8.0/en/optimization.html
This chapter explains how to optimize MySQL performance and provides examples. Depending on your job role (developer, DBA, or a combination of both), you might optimize at the level of individual SQL statements, entire applications, a single ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-benchmarking.html
To measure performance, consider the following factors: Whether you are measuring the speed of a single operation on a quiet system, or how a set of operations (a “workload”) works over a period of time. With simple tests, you usually test how ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-character.html
For character and string columns, follow these guidelines: Use binary collation order for fast comparison and sort operations, when you do not need language-specific collation features. You can use the BINARY operator to use binary collation within ...
https://dev.mysql.com/doc/refman/8.0/en/optimizer-features-to-trace.html
Some features in the optimizer can be invoked many times during statement optimization and execution, and thus can make the trace grow beyond reason. They are: Greedy search: With an N-table join, this could explore factorial(N) plans. Range ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-diskio.html
If you follow best practices for database design and tuning techniques for SQL operations, but your database is still slow due to heavy disk I/O activity, consider these disk I/O optimizations. If the Unix top tool or the Windows Task Manager shows ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-logging.html
Consider the following guidelines for optimizing redo logging: Increase the size of your redo log files. When InnoDB has written redo log files full, it must write the modified contents of the buffer pool to disk in a checkpoint. From MySQL 8.0.30, ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-queries.html
To tune queries for InnoDB tables, create an appropriate set of indexes on each table. Follow these guidelines for InnoDB indexes: Because each InnoDB table has a primary key (whether you request one or not), specify a set of primary key columns ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-storage-layout.html
Once your data reaches a stable size, or a growing table has increased by tens or some hundreds of megabytes, consider using the OPTIMIZE TABLE statement to reorganize the table and compact any wasted space. The reorganized tables require less disk ...