Root cause correlation

  • Rversion finale: Australia
  • Mis à jour 12 mars 2026
  • 1 minute de lecture

    • Root Cause Correlation (RCC) finds a root cause by automatically correlating metrics, logs, and event information for supported symptoms on production instances for the last 24 hours.

    RCC symptom categories

    The RCC feature is available for self-service alerts and Critical or Warning performance symptom categories:
    • Memory
    • Longest running sessions
    • Slow transactions
    • Cache flush
    • Database locks
    • Database impacts
    The table describes the symptom categories and the corresponding alerts that the RCC engine detects.
    Tableau 1. Targeted symptoms categories and corresponding alerts
    Symptoms​ categories Description Corresponding alert
    Database Impact​ Helps you to identify and address extended SQL queries impacting database performance, tied to high execution time, or increased volumes. The query patterns give snapshots of 30-minute and 60-minute durations from the time that the impact is observed on query execution times.​ Database response time
    Cache Flush​ Cache flushes and node restarts are detected, as well as high service saturation levels that may have occurred around the time a performance alert was triggered.​ Default semaphore mean
    Longest Running Session​
    • Searches for the top long-running sessions in mean time to recover (MTTR) logs
    • Identifies the top transaction pattern hash with the highest processing times and then the transaction IDs.​
    		 Default semaphore mean
    Slow Transactions ​
    • Identifies the top long-running transactions using the total duration, including ACL time, SQL time, CPU time, processing time, BR time, and script time.
    • Returns the transaction IDs, the pattern hash, and these metrics to help you identify the specific causes of long-running transactions.
    ​    		 Default semaphore mean​
    Memory​
    • Pinpoints the three nodes most impacted by garbage collection pauses, determined by the aggregate duration of the pauses.
    • Identifies any transactions or worker threads on these nodes that exceed 200 seconds.
      Remarque :
      Users are advised to review these long-running or frequently recurring threads.​
    		 Node Garbage Collection Time
    DB locks​ The RCC engine monitors innodb_row_lock_waits and threads_running to detect anomalous database lock events that occur when a database operation requires exclusive access.​ Threads running​
    Remarque :
    As soon as any of the aforementioned alerts or Critical or Warning performance are identified, the system automatically generates an RCA report after waiting for a maximum of 10 minutes, depending on the conditions.