https://dev.mysql.com/mysql-cluster-programs-ndbd.html
--connect-delay=# Property Value Command-Line Format --connect-delay=# Deprecated Yes Type Numeric Default Value 5 Minimum Value 0 Maximum Value 3600 Determines the time to wait between attempts to contact a management server when starting (the ...
https://dev.mysql.com/wait-summary-tables.html
row *************************** EVENT_NAME: wait/synch/mutex/sql/BINARY_LOG::LOCK_index COUNT_STAR: 8 SUM_TIMER_WAIT: 2119302 MIN_TIMER_WAIT: 196092 AVG_TIMER_WAIT: 264912 MAX_TIMER_WAIT: 569421 ... row *************************** EVENT_NAME: ...
https://dev.mysql.com/performance-schema-statement-digests.html
For example, table columns that show wait times, lock times, or index use may highlight types of queries that are inefficient. A typical number of statements in this table is 10 per session, so each session will consume 10 times the memory indicated ... The MySQL server is capable of maintaining statement digest ...
https://dev.mysql.com/sys-statement-analysis.html
total_latency The total wait time of timed occurrences of the statement. max_latency The maximum single wait time of timed occurrences of the statement. avg_latency The average wait time per timed occurrence of the statement. lock_latency The total ...The statement_analysis and x$statement_analysis views have these columns: query The normalized statement ...
https://dev.mysql.com/backup-types.html
These provide logical copies of the file system at a given point in time, without requiring a physical copy of the entire file system. (For example, the implementation may use copy-on-write techniques so that only parts of the file system modified ... This section describes the characteristics of different types of ...
https://dev.mysql.com/information-functions.html
It may be used to time how quickly MySQL processes the expression. The intended use is from within the mysql client, which reports query execution times: mysql> SELECT BENCHMARK(1000000,AES_ENCRYPT('hello','goodbye')); ...The result value is 0, or ...
https://dev.mysql.com/storage-requirements.html
InnoDB Table Storage Requirements NDB Table Storage Requirements Numeric Type Storage Requirements Date and Time Type Storage Requirements String Type Storage Requirements Spatial Type Storage Requirements JSON Storage Requirements The storage ...
https://dev.mysql.com/faqs-replication.html
Must the slave be connected to the master all the time? A.13.2. Must the slave be connected to the master all the time? No, it does not. For example, you can set up a master/slave relationship over a dial-up link where the link is up only ... In the ...
https://dev.mysql.com/resource-groups.html
Currently, CPU time is a manageable resource, represented by the concept of “virtual CPU” as a term that includes CPU cores, hyperthreads, hardware threads, and so forth. Some attributes are fixed at creation time; others can be modified any ...
https://dev.mysql.com/performance-schema-stage-tables.html
For additional information about configuring event collection, see Section 26.3, “Performance Schema Startup Configuration”, and Section 26.4, “Performance Schema Runtime Configuration”. The Performance Schema tables provide a container to ... The Performance Schema instruments stages, which are steps during the statement-execution process, such as parsing a statement, opening a table, or performing a filesort ...
