The queue manager error log stanza

Use the QMErrorLog stanza in the qm.ini file to tailor the operation and contents of queue manager error logs.

ErrorLogSize=maxsize
Specifies the size of the queue manager error log at which it is copied to the backup. maxsize must be between 1048576 and 2147483648 bytes. If ErrorLogSize is not specified, the default value of 262144 bytes (256 KB) is used.
ExcludeMessages=msgIds
Specifies messages that are not to be written to the queue manager error log. msqIds contain a comma separated list of message IDs from the following:
SuppressMessages=msgIds
Specifies messages that will be written to the queue manager error log once only in a specified time interval. The time interval is specified by SuppressInterval. msqIds contain a comma separated list of message IDs from the following: If the same message id is specified in both SuppressMessages and ExcludeMessages, the message is excluded.
SuppressInterval=length
Specifies the time interval, in seconds, in which messages specified in SuppressMessages will be written to the queue manager error log once only. length must be between 1 and 86400 seconds. If SuppressInterval is not specified, the default value of 30 seconds is used.