Notify files
DB2 UDB also provides diagnosis information to the administration notification 
log in case of a failure. On Linux and UNIX platforms, the administration 
notification log is a text file called 
.nfy
, where 
 is the name 
of the instance. It is located in the same directory as the db2diag.log file. On 
Windows, all administration notification messages are written to the Event Log.
The DBM configuration parameter 
NOTIFYLEVEL
 specifies the level of information 
to be recorded:
0   No administration notification messages captured (not recommended)
1   Fatal or unrecoverable errors
2   Immediate action required
3   Important information, no immediate action required (default)
4   Informational messages
Not only DB2 UDB can write to the notify logs, but also the Health Monitor, the 
C
apture and Apply programs, and user applications using the 
db2AdminMsgWrite
API function.
Trap files
Whenever a DB2 UDB process receives a signal or exception (raised by the 
operating system as a result of a system event) that is recognized by the DB2 
signal handler, a trap file is generated in the DB2 diagnostic directory. The files 
are created using the following naming convention:
Linux and UNIX:
  tpppppp.nnn
pppppp
: The process ID (PID)
nnn
: The node where the trap occurred
  Example: t123456.000
Windows:
  DBpppttt.TRP
ppp
 : The process ID (PID)
ttt
 : The thread ID (TID)
  Example: DB123654.TRP
Depending on the signal received or the exception raised, the existence of these 
files can indicate different extremes of consequences. These consequences can 
range from the generation of a simple stack trace back for additional diagnostics, 
 Chapter 9. Testing and tuning 
281






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