text: (cid:2)**-gmmaxhostdelay*max_host_delay***
  
  This parameter specifies the maximum time delay, in milliseconds, at which the Global 
  Mirror link tolerance timer starts counting down. This threshold value determines the 
  additional effect that Global Mirror operations can add to the response times of the Global 
  Mirror source volumes. You can use this parameter to increase the threshold from the 
  default value of 5 milliseconds. 
  
  (cid:2)**-maxreplicationdelay*max_replication_delay***
  
  This parameter sets a maximum replication delay in seconds. The value must be a 
  number 0 - 360 (0 being the default value, no delay). This feature sets the maximum 
  number of seconds to be tolerated to complete a single I/O. If I/O cannot complete within 
  the***max_replication_delay***, the 1920 event is reported. This is the system-wide setting, 
  and applies to MM/GM relationships. 
  
  Use the**chsystem**command to adjust these values, as shown in the following example: 
  
  chsystem -gmlinktolerance 300 
  
  You can view all of these parameter values by using the**lssystem <*system_name*>**command. 
  
  Focus on the**gmlinktolerance**parameter in particular. If poor response extends past the 
  specified tolerance, a 1920 event is logged and one or more GM relationships automatically 
  stop to protect the application hosts at the primary site. During normal operations, application 
  hosts experience a minimal effect from the response times because the GM feature uses 
  asynchronous replication. 