Hi, After install RAC database, we found this wait event appearing like top wait event in database. We would like to identify the problem and find a solution. thanks
Oracle Database Performance Tuning Guideto learn about wait event statistics Mutexes Amutual exclusion object (mutex)is a low-level mechanism that prevents an object in memory from aging out or from being corrupted when accessed by concurrent processes. A mutex is similar to a latch, but whereas...
minor_merge_concurrency用于设置转储时的并发线程数。 属性描述 参数类型整型 默认值0,表示并发线程数为 min[10,cpu_cnt] 取值范围[0, 64] 是否重启 OBServer 生效否 配置示例 设置触发 Minor Merge 时的并发线程数为 3。 obclient>ALTER SYSTEM SET minor_merge_concurrency=3;...
wait_leader_batch_count log_disk_size log_disk_percentage tablet_ls_cache_priority zone_merge_concurrency opt_tab_stat_cache_priority zone_merge_order index_block_cache_priority zone_merge_timeout sql_login_thread_count ob_esi_rpc_port enable_asan_for_memory_context enable_ob_esi_process enable...
The Task class enables developers to implement asynchronous tasks in JavaFX applications. The Service class executes tasks. The WorkerStateEvent class specifies an event that occurs whenever the state of a Worker implementation changes. Both the Task and Service classes implement the EventTarget ...
wait for a lock on a data dictionary cache. The enqueue will be on a specific data dictionary object. This is called the enqueue type and can be found in the v$rowcache view. Waits on this event usually indicate some form of DDL occurring, or possibly recursive operations such as storage...
public void clear(AjaxBehaviorEvent event) { cancelAction(); } public void invokeRosterReport() { ReportRunnable rosterReport = new ReportRunnable("RosterReport"); /* * Typically, the Future object should be cached somewhere and then * polled periodically to retrieve status of the task ...
here concurrent transaction will trying to update the same row, that's why i am using WITH UPLCOK IN SELECT STATEMENT ,JUST LIKE FOR UPDATE OF in ORACLE. So when one transaction acquire a lock on a row , next transaction will wait till current transaction COMMITS THE TRANSACTION.IN SQL SE...
Event Hubs Extended Location Fabric Face API Fluid Relay Front Door Functions Grafana Graph Services Hardware Security Module HDInsight Health Bot Health Data AI Services Healthcare APIs Hybrid Compute Hybrid Connectivity Hybrid Kubernetes Hybrid Network Identity Image Builder Image Search Inform...
Event Hubs Extended Location Fabric Fluid Relay Front Door Functions Grafana Graph Services Hardware Security Module HDInsight Health Bot Health Data AI Services Health Deidentification Healthcare APIs Hybrid Compute Hybrid Connectivity Hybrid Kubernetes Hybrid Network Identity Image Bu...