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https://dev.mysql.com/doc/refman/8.4/en/host-cache.html
If that is successful, the host name is updated with the resolved host name and the validation flag is set to true. (In this case, another DNS resolution attempt occurs the next time a client connects from this IP.) If an error occurs while ... The ...The Performance Schema host_cache table exposes the contents of the host cache so that it can be examined using SELECT ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-ipv6.html
To use IPv6 addresses, the operating system on the server host and the MySQL Server instance must both be configured to support IPv6. If a host name specified as the Group Replication local address for a server instance resolves to both an IPv4 and ... Group Replication group members can use IPv6 addresses as an alternative to IPv4 addresses for communications within the ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-restarting-group.html
The replication group must therefore be restarted beginning with the most up to date member, that is, the member that has the most transactions executed and certified. You must therefore restart each member to check the transactions, compare all the ...As long as the remaining members are a majority of the group they can elect a new primary and continue to function as a ... Group Replication is designed to ensure that the database service is continuously available, even if ...
https://dev.mysql.com/doc/internals/en/myisam-column-attributes.html
Packed as: 'day + month*32 + year*16*32' Example: a DATE column containing '1962-01-02' looks like: hexadecimal 22 54 0F DATETIME Storage: eight bytes. Example: a DATETIME column for '0001-01-01 01:01:01' looks like: hexadecimal B5 2E 11 5A 02 00 00 ...The format depends entirely on the data type and the size of the column, so, for every data type, I'll give a description and an ...
https://dev.mysql.com/doc/internals/en/mysys-functions.html
void get_date _A((string to, int timeflag)); Get current date in a form ready for printing. int my_getwd _A((string buf, uint size, myf MyFlags)); , int my_setwd _A((const char *dir, myf MyFlags)); Get and set working directory. string my_tempnam ...
https://dev.mysql.com/doc/internals/en/debug-sync-facility.html
It cannot synchronize multiple processes.) However, to support test development, and as a last resort, synchronization point waiting times out. When the signal thread notifies the wait thread, the signal name is copied into global list and the wait ... MySQL supports a Debug Sync Facility, which - in spite of the "debug" in its name - is completely independent from the DBUG facility (except that it uses DBUG to trace its operation, if DBUG is also configured in the ...
https://dev.mysql.com/doc/relnotes/heatwave/en/news-8-0-31.html
The new column model_metadata in the MODEL_CATALOG table records metadata for models, such as the training score, training time, and information about the training dataset. (WL #15243) MySQL HeatWave AutoML now supports timeseries forecasting using ... MySQL HeatWave AutoML Functionality Added or Changed MySQL HeatWave AutoML MySQL HeatWave AutoML queries are now monitored and recorded in the Performance Schema tables rpd_query_stats and ...
https://dev.mysql.com/doc/refman/8.4/en/clone-plugin-replication.html
To initiate replication, the binary logs required for the recipient to catch up to the donor must not be purged between the time that the data is cloned and the time that replication is started. In addition to cloning data, a cloning operation ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-limitations-transactions.html
A number of limitations exist in NDB Cluster with regard to the handling of transactions. LOCK IN SHARE MODE causes shared row locks to be used; FOR UPDATE causes exclusive row locks to be used. See Section 25.6.8.4, “NDB Cluster Backup ...The ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-error-summary-tables.html
SUM_ERROR_HANDLED This column aggregates the number of times the error was handled by an SQL exception handler. FIRST_SEEN, LAST_SEEN Timestamp indicating when the error was first seen and most recently seen. The Performance Schema maintains ...For ...