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https://dev.mysql.com/doc/refman/9.7/en/performance-schema-examples.html
With each iteration, the Performance Schema output, particularly the events_waits_history_long table, contains less and less “noise” caused by nonsignificant instruments, and given that this table has a fixed size, contains more and more data ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-keyring-component-status-table.html
The keyring_component_status table provides status information about the properties of the keyring component in use, if one is installed. The table is empty if no keyring component is installed (for example, if the keyring is not being used, or is ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-replication-group-member-stats-table.html
The replication_group_member_stats table has these columns: CHANNEL_NAME Name of the Group Replication channel VIEW_ID Current view identifier for this group. This has a different value for each member in the group. This also serves as a key because ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-statement-digests.html
The MySQL server is capable of maintaining statement digest information. The digesting process converts each SQL statement to normalized form (the statement digest) and computes a SHA-256 hash value (the digest hash value) from the normalized ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-timing.html
Events are collected by means of instrumentation added to the server source code. Instruments time events, which is how the Performance Schema provides an idea of how long events take. It is also possible to configure instruments not to collect ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-tls-channel-status-table.html
The properties exposed by this table are not fixed and depend on the instrumentation implemented by each channel. Connection interface TLS properties are set at server startup, and can be updated at runtime using the ALTER INSTANCE RELOAD TLS ...
https://dev.mysql.com/doc/refman/9.7/en/perl-support-problems.html
You should be able to fix this problem by one of the following methods: Copy libmysqlclient.so to the directory where your other shared libraries are located (probably /usr/lib or /lib). If Perl reports that it cannot find the ../mysql/mysql.so ...
https://dev.mysql.com/doc/refman/9.7/en/precision-math.html
MySQL provides support for precision math: numeric value handling that results in extremely accurate results and a high degree control over invalid values. Precision math is based on these two features: SQL modes that control how strict the server ...
https://dev.mysql.com/doc/refman/9.7/en/replication-features-errors.html
If a statement produces the same error (identical error code) on both the source and the replica, the error is logged, but replication continues. If a statement produces different errors on the source and the replica, the replication SQL thread ...
https://dev.mysql.com/doc/refman/9.7/en/replication-privilege-checks-recover.html
If you can identify why the event took place and there are no security considerations, proceed to fix the error as described below. If a privilege check against the PRIVILEGE_CHECKS_USER account fails, the transaction is not executed and ...