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https://dev.mysql.com/doc/internals/en/optimizer-index-merge-join-type.html
OR t_n) where each of t_i stands for a SEL_TREE object, and no pair (t_i, t_j) of distinct SEL_TREE objects can be combined into single SEL_TREE object. 7.2.2.5.1 Overview Index Merge is used when table condition can be converted to form: cond_1 OR ...
https://dev.mysql.com/doc/internals/en/the-myi-file.html
A .MYI file for a MyISAM table contains the table's indexes. The .MYI file has two parts: the header information and the key values. So the next sub-sections will be "The .MYI Header" and "The .MYI Key Values". The .MYI Header A .MYI file begins ...
https://dev.mysql.com/doc/ndbapi/en/mccj-using-clusterj-operations.html
To insert a new row into the table, first create a new instance of Employee. This can be accomplished by calling the Session method newInstance(), as shown here: Employee newEmployee = session.newInstance(Employee.class); Set the Employee instance ...
https://dev.mysql.com/doc/ndbapi/en/ndb-examples-event-handling.html
The source code for this program may be found in the NDB Cluster source tree, in the file storage/ndb/ndbapi-examples/ndbapi_event/ndbapi_event.cpp. #include <NdbApi.hpp> // Used for cout #include <stdio.h> #include <iostream> #include <unistd.h> ...
https://dev.mysql.com/doc/ndbapi/en/ndb-nodejs-api-converter.html
fromDB(val): Convert a value val read from the database into application object format. If the user supplies a JavaScript converter, it used to read and write to the database. Converter invocations are chained in the following ways: When writing to ...
https://dev.mysql.com/doc/ndbapi/en/ndbapi-examples-common-files.html
*/ allocate_in_bytes(column, new_ref, data_start, input.length(), error); if(error != Success) { return NULL; } /* Copy the input string into aRef's data pointer without affecting remaining blank spaces at end. In the NDB Cluster source ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-cluster-metric-mysqlserver-innodbactivity-category.html
Buffer Pool Read Ahead (Delta) The number of pages read into the InnoDB buffer pool by the read-ahead background thread. Buffer Pool Read Ahead Evicted (Delta) Pages read into InnoDB buffer pool by the read-ahead thread that were evicted without ...
https://dev.mysql.com/doc/mysql-em-plugin/en/ui-myoem-homepage-regions.html
The graph is broken down into the following transaction types: Commit (Delta) Rollback (Delta) Release Savepoint (Delta) Rollback to Savepoint (Delta) Savepoint (Delta) Begin (Delta) If you hover the cursor over one of the lines, a tooltip displays ... This section describes the regions displayed on the MySQL Database target ...
https://dev.mysql.com/doc/mysql-monitor/8.0/en/performance-advisors-ref.html
Default frequency 00:05:00 Default auto-close enabled no InnoDB Buffer Pool Writes May Be Performance Bottleneck For optimal performance, InnoDB should not have to wait before writing pages into the InnoDB buffer pool. Otherwise, MySQL acquires a ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-about-analytics.html
Manually loading data into MySQL HeatWave involves preparing tables on the DB System and executing load statements. For MySQL HeatWave on AWS, load data into MySQL HeatWave using the MySQL HeatWave Console. Data loaded into MySQL HeatWave, including ... When a MySQL HeatWave Cluster is enabled, queries that meet certain prerequisites are automatically offloaded from the DB System to the MySQL HeatWave Cluster for accelerated ...