![freeze - MySQL 8.0.31 INNODB table hangs on copy to tmp table when doing ALTER TABLE to add Column - Stack Overflow freeze - MySQL 8.0.31 INNODB table hangs on copy to tmp table when doing ALTER TABLE to add Column - Stack Overflow](https://i.stack.imgur.com/RIBH3.png)
freeze - MySQL 8.0.31 INNODB table hangs on copy to tmp table when doing ALTER TABLE to add Column - Stack Overflow
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MySQL starts using > 90% of CPU, "Copying to tmp table on disk" and "converting HEAP to MyISAM" - YouTube
![mysql - Copying to tmp table slow for query ... but only sometimes - Database Administrators Stack Exchange mysql - Copying to tmp table slow for query ... but only sometimes - Database Administrators Stack Exchange](https://i.stack.imgur.com/hPTyU.png)
mysql - Copying to tmp table slow for query ... but only sometimes - Database Administrators Stack Exchange
![mysql - Copying to tmp table slow for query ... but only sometimes - Database Administrators Stack Exchange mysql - Copying to tmp table slow for query ... but only sometimes - Database Administrators Stack Exchange](https://i.stack.imgur.com/hxss2.png)