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https://dev.mysql.com/doc/internals/en/uncompressed-payload.html
For small packets it may be to costly to compress the packet: compressing the packet may lead to more data and sending the data uncompressed CPU overhead may be not worth to compress the data Tip Usually payloads less than 50 bytes ...To send an ...
https://dev.mysql.com/doc/internals/en/x-protocol-implementation-implementation-notes.html
Topics in this section: Client Server Client and Server implementations of the protocol should make use of the following: vectorized IO pipelining to reduce the latency and CPU usage. Client Out-of-Band Messages The client should decode the ...
https://dev.mysql.com/doc/internals/en/x-protocol-notices-notices.html
Note Checking for SHOW SLAVE STATUS and io_thread and sql_thread leads to a race condition for the following query. Global Notices Global Notices are sent by the server in case of events happen that are unrelated to the currently active message ...
https://dev.mysql.com/doc/mysqld-version-reference/en/built-in-functions.html
The following table shows all built-in functions and operators available in MySQL Server. Introduced: The version or versions in which the item was introduced. Deprecated: The version or versions in which the item was deprecated. Removed: The ...
https://dev.mysql.com/doc/mysqld-version-reference/en/keywords-5-7.html
This section provides information about keywords and reserved words in MySQL 5.7. MySQL 5.7 Keywords and Reserved Words MySQL 5.7 New Keywords and Reserved Words MySQL 5.7 Removed Keywords and Reserved Words MySQL 5.7 Keywords and Reserved Words ...
https://dev.mysql.com/doc/ndbapi/en/ndb-column.html
For variable length types, the leading 1 or 2 bytes pointed to by buffer also contain size information as normal for the type. This section provides information about the Column class, which models a column in an NDBCLUSTER table. The NDB API ...
https://dev.mysql.com/doc/ndbapi/en/ndb-ndb-cluster-connection.html
This state is not thread-safe; changing it can lead to non-optimal node selection at the time of the change. This section provides information about the Ndb_cluster_connection class, which models a connection by a management server (ndb_mgmd) to a ...
https://dev.mysql.com/doc/ndbapi/en/ndb-start-establishing-connection.html
This may lead to poor load distribution in some cases, so it is possible to enforce a round-robin node connection scheme by calling the set_optimized_node_selection() method with 0 as its argument prior to calling connect(). To establish a ...
https://dev.mysql.com/doc/ndbapi/en/overview-adaptive-send.html
There are four conditions leading to the transfer of database operations from Ndb object buffers to the NDB kernel: The NDB Transporter (TCP/IP or shared memory) decides that a buffer is full and sends it off. Abstract Discusses the mechanics of ...
https://dev.mysql.com/doc/ndbapi/en/overview-ndbinterpretedcode-using.html
The regular expression pattern should be in plain CHAR format, even if the column is actually a VARCHAR (in other words, there should be no leading length bytes). The next few sections provide information about performing different types of ...