How To Fix DB11177 - Wait event 'latch free latch: '

DB11177 - Overview

• Message type: E = Error

• Message class: DB11 - Oracle Monitor: messages

• Message number: 177

• Message text: Wait event 'latch free latch: '

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB11177 - Wait event 'latch free latch: ' ?

  The SAP error message DB11177, which indicates a wait event for "latch free latch: ", typically arises in Oracle databases when a session is waiting for a latch that is currently held by another session. Latches are lightweight synchronization mechanisms used in Oracle to protect shared data structures in memory. When a session cannot acquire a latch, it will wait, leading to potential performance issues.
  Causes:
  
  High Contention: Multiple sessions are trying to access the same latch simultaneously, leading to contention.
  Inefficient Code: Poorly optimized SQL queries or PL/SQL code can lead to excessive latch contention.
  
  Configuration Issues: Incorrect database configuration or insufficient resources can exacerbate latch contention.
  Heavy Load: A sudden increase in workload can lead to more sessions competing for the same latches.
  Bug in Oracle: Sometimes, specific versions of Oracle may have bugs that lead to latch contention.
  
  Solutions:
  
  
  Identify the Latch: Use Oracle's performance views (like V$LATCH, V$SESSION, and V$SESSION_WAIT) to identify which latch