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https://dev.mysql.com/doc/refman/8.4/en/performance-schema-status-monitoring.html
For example, if a mutex is instrumented in the server source but the server cannot allocate memory for the instrumentation at runtime, it increments Performance_schema_mutex_classes_lost. The mutex still functions as a synchronization object (that ...Names for these variables have several forms: Performance_schema_xxx_classes_lost indicates how many instruments of type xxx could not be ...
https://dev.mysql.com/doc/refman/8.4/en/replication-upgrade.html
When you upgrade servers that participate in a replication topology, you need to take into account each server's role in the topology and look out for issues specific to replication. For general information and instructions for upgrading a MySQL ...
https://dev.mysql.com/doc/refman/8.4/en/connection-compression-control.html
Compression control applies to connections to the server by client programs and by servers participating in source/replica replication or Group Replication. Configuring Legacy Connection Compression Prior to MySQL 8.0.18, these configuration ...
https://dev.mysql.com/doc/refman/8.4/en/reusing-ssl-sessions.html
MySQL client programs may elect to resume a prior SSL session, provided that the server has the session in its runtime cache. Client-Side Configuration for SSL Session Reuse All MySQL client programs are capable of reusing a prior session for new ...This section describes the conditions that are favorable for SSL session reuse, the server variables used for managing and monitoring the session cache, and the client command-line options for storing and reusing session ...
https://dev.mysql.com/doc/connectors/en/connector-net-connections-string.html
The following is a sample connection string: "server=127.0.0.1;uid=root;pwd=12345;database=test" In this example, the MySqlConnection object is configured to connect to a MySQL server at 127.0.0.1, with a user name of root and a password of 12345.
https://dev.mysql.com/doc/connector-net/en/connector-net-connections-string.html
The following is a sample connection string: "server=127.0.0.1;uid=root;pwd=12345;database=test" In this example, the MySqlConnection object is configured to connect to a MySQL server at 127.0.0.1, with a user name of root and a password of 12345.
https://dev.mysql.com/doc/mysql-monitor/8.0/en/admin-advisors-reference.html
If the server host machine or operating system crash, there is a chance that the latest events in the binary log are not persisted on disk. If the value of this variable is greater than 0, the MySQL server synchronizes its binary log to disk (using ...However, for performance reasons, it is recommended to run 64-bit binaries on 64-bit platforms, and 32-bit binaries on 32-bit ...
https://dev.mysql.com/doc/refman/8.4/en/connection-access.html
When you attempt to connect to a MySQL server, the server accepts or rejects the connection based on these conditions: Your identity and whether you can verify it by supplying the proper credentials. A failure at either step causes the server to ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-group-membership.html
In MySQL Group Replication, a set of servers forms a replication group. The group is dynamic and servers can leave (either voluntarily or involuntarily) and join it at any time. If a server joins the group, it automatically brings itself up to date ...A group has a name, which takes the form of a ...
https://dev.mysql.com/doc/refman/8.4/en/replication-gtids-assign-anon.html
This feature enables replication from a source server that does not have GTIDs enabled and does not use GTID-based replication, to a replica that has GTIDs enabled. If it is possible to enable GTIDs on the replication source server, as described in ... You can set up replication channels to assign a GTID to replicated transactions that do not already have ...