Oracle Database Internal Mechanism

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Tag Archives: ORA-00239

ORA-00239 Timeout waiting for control file enqueue: held by ‘%s’ for more than %s seconds

Cause: The specified process waited the maximum allowed time for the control file enqueue. Action: Restart the blocking instance indicated in the incident trace file or reboot the blocking node.

March 19, 2020 in Oracle.

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  • Nitish Anand Srivastava
  • Oracle 12c
    • 12c New Features – Database In-Memory
    • 12c New Features – Global Temporary Table Undo
    • 12c New Features – Online DataFile Move
    • 12c New Features – Partial Indexes
    • 12c New Features – Table PITR in Oracle 12c
    • Installing 12c Database on Oracle Linux 7
    • Managing a CDB & PDB [Basic DBA Commands]
    • Oracle 12c Architecture
  • Oracle Backup & Recovery
    • Performing Block-Level Recovery
    • Performing Cancel-Based Recovery
    • Performing Database-Level Recovery
    • Performing Datafile-Level Recovery
    • Performing Log Sequence–Based Recovery
    • Performing SCN-Based Recovery
    • Performing Tablespace Point-in-Time Recovery
    • Performing Tablespace-Level Recovery
    • Performing Time-Based Recovery
    • Recovering from the LOSS of REDO log files
    • Recovering Read-Only Tablespaces
    • Restore database in case of dropped table
    • Restoring a Database (NoArchivelog mode)
    • Tips & Tricks
  • Oracle database Internal Mechanism
  • Oracle Database Internals
    • How to Interpret an Explain Plan
    • Index Lookup (Unique Scan,Range Scan, Full Scan, Fast Full Scan, Skip Scan)
    • Oracle Memory Architecture Internals(SGA & PGA)
    • Oracle Process Architecture Internals
    • What are Joins in Oracle
    • What is a Full Table Scan (FTS) in Oracle
  • Oracle Dataguard
    • How to Create Active DataGuard
    • How to Create Logical Standby in DataGuard
    • How to Create Physical Standby in DataGuard
    • How to Create Snapshot Standby in DataGuard
    • How to Perform Failover in DataGuard
    • How to Perform Switchover in DataGuard
  • Oracle GoldenGate
    • How to Install oracle Golden Gate on UNIX
    • How to setup GoldenGate Replication in Oracle
    • Oracle GoldenGate Architecture Internals
  • Oracle Performance Tuning
  • Oracle RAC
    • GPNP Profile Internals
    • Network & Disk Heartbeats
    • OCR Internals
    • OLR Internals
    • SCAN Internals
    • Split Brain Syndrome
    • Voting Disk Internals

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