https://dev.mysql.com/monitor-alter-table-performance-schema.html
mysql> ALTER TABLE employees.employees ADD COLUMN middle_name varchar(14) AFTER first_name; Query OK, 0 rows affected (9.27 sec) Records: 0 Duplicates: 0 Warnings: 0 Check the progress of the ALTER TABLE operation by querying the Performance Schema ... You can monitor ALTER TABLE progress for InnoDB tables using Performance ...
https://dev.mysql.com/myisam-maintenance-schedule.html
If you are performing many updates to MyISAM tables with dynamic-sized rows (tables with VARCHAR, BLOB, or TEXT columns) or have tables with many deleted rows you may want to defragment/reclaim space from the tables from time to time. It is a good ...
https://dev.mysql.com/myisamchk-general-options.html
This is often the case when you have large key values for CHAR, VARCHAR, or TEXT columns, because the sort operation needs to store the complete key values as it proceeds. The options described in this section can be used for any type of table ...
https://dev.mysql.com/mysql-cluster-limitations-syntax.html
However, you can create indexes on VARCHAR columns of NDB tables. Some SQL statements relating to certain MySQL features produce errors when used with NDB tables, as described in the following list: Temporary tables. Trying either to create a ...
https://dev.mysql.com/mysql-cluster-limitations-unsupported.html
A number of features supported by other storage engines are not supported for NDB tables. Trying to use any of these features in NDB Cluster does not cause errors in or of itself; however, errors may occur in applications that expects the features ...
https://dev.mysql.com/mysql-cluster-ndb-innodb-engines.html
The NDB storage engine is implemented using a distributed, shared-nothing architecture, which causes it to behave differently from InnoDB in a number of ways. For those unaccustomed to working with NDB, unexpected behaviors can arise due to its ...
https://dev.mysql.com/mysql-cluster-ndbinfo-restart-info.html
Table 22.357 Columns of the restart_info table Column Name Type Description node_id integer Node ID in the cluster node_restart_status VARCHAR(256) Node status; see text for values. Each entry in the table corresponds to a node restart status report ...
https://dev.mysql.com/mysql-cluster-programs-ndb-size-pl.html
This is a Perl script that can be used to estimate the amount of space that would be required by a MySQL database if it were converted to use the NDBCLUSTER storage engine. Unlike the other utilities discussed in this section, it does not require ...
https://dev.mysql.com/mysql-cluster-what-is-new.html
For a VARCHAR, this often involved adding more spaces than there were characters in the original string. The following sections describe changes in the implementation of NDB Cluster in MySQL NDB Cluster 8.0 through 8.0.20, as compared to earlier ...
https://dev.mysql.com/mysql-stmt-execute.html
int mysql_stmt_execute(MYSQL_STMT *stmt) mysql_stmt_execute() executes the prepared query associated with the statement handler. The currently bound parameter marker values are sent to server during this call, and the server replaces the markers ...
