Often and in my case the wait for a Row Cache Lock is the culmination of a chain of events and the lock being held is a symptom of another issue where a process holding the requested row cache enqueue is being blocked by other processes. If you see a lot of different sessions doing d...
Often and in my case the wait for a Row Cache Lock is the culmination of a chain of events and the lock being held is a symptom of another issue where a process holding the requested row cache enqueue is being blocked by other processes. If you see a lot of different sessions doing d...
1 row updated. SQL> The lock on the Banda row is now released, so transaction 2 proceeds with its update to the salary for Banda. SQL> SELECT last_name, salary FROM employees WHERE last_name IN ('Banda','Greene','Hintz'); LAST_NAME SALARY --- --- Banda 6300 Greene 9900 Hint...
0 lock struct(s), heap size 1160, 0 row lock(s) ---TRANSACTION 84529, ACTIVE 103 sec inserting, thread declared inside InnoDB 6 mysql tables in use 2, locked 1 1 lock struct(s), heap size 1160, 0 row lock(s), undo log entries 111866 MySQL thread id 7, OS thread handle 14073715...
'IO Error: Could not set lock on file "/app/data/.cache/" My solution I've created a separateDockerfileandscriptwhich creates a ramdisk mounted at/app/data. When a container instance is started, the ramdisk is created and all writes go to RAM. ...
fast_recovery_concurrencyspecifies the number of fast recovery tasks scheduled by RootService and concurrently executed on the OBServer. Note This parameter is deprecated since OceanBase Database V4.0.0. AttributeDescription TypeInteger Default value10 ...
readCommittedLock readPast recordLevelSecurity relatedTable relationPath renamePrimaryKey reread RowCount selectForUpdate selectLocked selectRefRecord selectWithRepeatableRead serialize setConnection setCrossPartition setFieldValue setSQLTracing setTmp setTmpData setXDSContext skipAosValidation skipDatabaseLog skip...
This parameter is deprecated in OceanBase Database V4.0.0 and later. PropertyDescription TypeInteger Default value20 Value range[1,+∞) Effective upon OBServer node restartNo Previous topic cpu_count Last Next topic data_dir Next V4.2.0
This optimization is effective on all CPU architectures that have a cache per CPU, because MESI is so widespread. On Hyper-Threading CPUs, pausing with rep nop gives additional performance by hinting the core that it can work on the other thread while the lock spins waiting.[2] Transactional...
系统配置项 集群级配置项 backup_concurrency 更新时间:2024-12-10 23:00:00 backup_concurrency 用于设置备份时写文件系统的并发数量。 属性描述 参数类型整型 默认值0,表示使用系统指定的值 10 取值范围[0, 100] 是否重启 OBServer 生效否 联系我们 AI助手...