Configuring first failure data capture log file purges
The first failure data capture (FFDC) log file saves information that is generated from a processing failure. These files are deleted after a maximum number of days has passed. The captured data is saved in a log file for analyzing the problem.
Before you begin
The first failure data capture
(FFDC) feature preserves the information that is generated from a
processing failure and returns control to the affected engines. The
captured data is saved in a log file for analyzing the problem. FFDC
is intended primarily for use by IBM® Support.
FFDC instantly collects events and errors that occur during the product
run time. The information is captured as it occurs and is written
to a log file that can be analyzed by IBM Support
personnel.
FFDC is intended
primarily for use by IBM Support. FFDC instantly collects
events and errors that occur during the product run time. The information
is captured as it occurs and is written to a log file that can be
analyzed by IBM Support. The data is uniquely identified
for the servant region that produced the exception.
The
log file purges in seven days by default. If you are concerned about
the amount of disk space used by the FFDC log files, you can configure
the days between purges.
The FFDC configuration properties files are located in the properties directory under the Application Server product installation. You must set the ExceptionFileMaximumAge property to the same value in all three files: ffdcRun.properties, ffdcStart.properties, and ffdcStop.properties. You can set the ExceptionFileMaximumAge property to configure the days between purging the FFDC log files. The value of the ExceptionFileMaximumAge property must be a positive number. The FFDC feature does not affect the performance of the Application Server product.
About this task
Procedure
Results
The FFDC file management function
removes the FFDC log files that have reached the maximum age and generates
a message in the SystemOut.log file.
The
FFDC file management function removes the FFDC log files that have
reached the maximum age and generates a message in the SYSOUT of the
server job log.