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https://dev.mysql.com/doc/internals/en/sleep.html
In some cases race conditions can be repeated when all but one thread are blocked (for example waiting for an SQL lock). The problem here is to assure that the blocking threads run until they reach their blocking point before the remaining thread ...Then the remaining thread has plenty of time to go through the critical piece of ...
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/mccj-clusterj-sessionfactory.html
0 means that the receive thread is always active, and that retains poll rights for its own exclusive use, effectively blocking all user threads from becoming receivers. In such cases care should be taken to ensure that the receive thread does not ...
https://dev.mysql.com/doc/ndbapi/en/ndb-examples-scanning-basic.html
*/ myScanOp = myTrans->getNdbScanOperation(myTable); if (myScanOp == NULL) { std::cout << myTrans->getNdbError().message << std::endl; myNdb->closeTransaction(myTrans); return -1; } /** * Read without locks, without being placed in lock queue */ if( ... This example illustrates how to use the NDB scanning ...
https://dev.mysql.com/doc/ndbapi/en/overview-ndb-record-structure.html
If a requested lock (implicit and depending on database operation) cannot be attained within a specified time, then a timeout error results. Concurrent transactions as requested by parallel application programs and thread-based applications can ...
https://dev.mysql.com/doc/relnotes/connector-net/en/news-8-0-9.html
For additional information about the two types of locking, see Shared and Exclusive Locks. For example: SessionConfigManager.Save( "mysess", "{ \"uri\": \"mysqlx://myuser@localhost/mysess\", \"appdata\": { \"biz\": \"quux\" } }" ); ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-cluster-metric-mysqlserver-connectionactivity-category.html
Locked Connects (Delta) The number of attempts to connect to locked user accounts. Lists the Connection Activity metrics and provides a brief description of each. Table 8.2 Connection Activity Metrics Target NameName of the OEM TargetConnections ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-cluster-metric-mysqlserver-dmlstatementactivity-category.html
Lock Tables (Delta) The total number of LOCK TABLE statements executed. Unlock Tables (Delta) The total number of UNLOCK TABLES statements executed. Lists the DML Statement Activity metrics and provides a brief description of each. Table 8.4 DML ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-config-metric-innodbmemcachedconfiguration-category.html
Disable Rowlock Enabled Disables row locks for op via the InnoDB memcached interface. Enable Mdl Enabled Locks the table used by the InnoDB memcached plugin, so that it cannot be dropped or altered by DDL through the SQL interface. Lists the InnoDB ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-connections-pages-database-processes.html
Lock Latency The time spent waiting for locks by the current statement. Important This report retrieves data from the processlist view of the sys schema. If the sys schema, version 1.5.1 or higher, is not installed on the monitored MySQL server, the ...