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https://dev.mysql.com/doc/internals/en/integer.html
The MySQL Protocol has a set of possible encodings for integers: Fixed-length integers Length-encoded integers 14.1.1.1.1 Fixed-Length Integer Types Protocol::FixedLengthInteger A fixed-length integer stores its value in a series of bytes with the ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-prereqs.html
Model and Table Sizes The table used to train a model cannot exceed 10 GB, 100 million rows, or 1017 columns. Refer to the appropriate MySQL version for maximum MySQL HeatWave AutoML model sizes. MySQL 9.0.0 and later: The shape you set for the ...
https://dev.mysql.com/doc/refman/8.4/en/telemetry-metrics-configuration.html
telemetry.otel_exporter_otlp_metrics_max_tls System Variable telemetry.otel_exporter_otlp_metrics_max_tls Scope Global Dynamic No SET_VAR Hint Applies No Type Enumeration Default Value [none] Valid Values [none]1.21.3 Maximum TLS version to use for ... Server Configuration telemetry.metrics_enabled System Variable telemetry.metrics_enabled Scope Global Dynamic No SET_VAR Hint Applies No Type Boolean Default Value ON Controls whether telemetry metrics are collected or ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-online-ddl-space-requirements.html
If the operation takes a long time and concurrent DML modifies the table so much that the size of the temporary log file exceeds the value of innodb_online_alter_log_max_size, the online DDL operation fails with a DB_ONLINE_LOG_TOO_BIG error, and ...
https://dev.mysql.com/doc/internals/en/variation-of-protocol-option.html
If not, do something of the following: Exclude some protocol variants from execution. It is usual to run tests with and without the mysql-test-run.pl startup option "--ps-protocol". And there are also attempts of System QA to run the other ...
https://dev.mysql.com/doc/refman/8.4/en/json.html
A maximum of 3 JSON columns per NDB table is supported. MySQL parses any string used in a context that requires a JSON value, and produces an error if it is not valid as JSON. Positions for “at position N” in such error messages are 0-based, but ...The JSON data type provides these advantages over storing JSON-format strings in a string column: Automatic validation of JSON documents stored in JSON ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-data-load-prerequisites.html
For example, avoid running DDL and large DML operations on the LINEITEM table while executing an ALTER TABLE LINEITEM SECONDARY_LOAD operation. Load time is affected if the primary key contains more than one column, or if the primary key column is ... This topic describes how to prepare your data for loading into MySQL ...
https://dev.mysql.com/doc/internals/en/determining-logging-format.html
THD::decide_logging_format() also determines if the statement is impossible to log, in which case it generates an error and the statement is not executed. At parse time, it is detected if the statement is unsafe to log in statement format (that is, ... For each statement, we must determine the logging format: row or ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-frequently-asked-questions.html
Warning When the network round-trip time (RTT) between any group members is 5 seconds or more you could encounter problems as the built-in failure detection mechanism could be incorrectly triggered. Two settings are available to increase the chances ...What is the maximum number of MySQL servers in a group? A group can consist of maximum 9 ...
https://dev.mysql.com/doc/connectors/en/connector-net-using-character-sets.html
Treating Binary Blobs As UTF8 Before the introduction of 4-byte UTF-8 character set, MySQL did not support 4-byte UTF8 sequences. This makes it difficult to represent some multibyte languages such as Japanese. To try and alleviate this, MySQL ...