This section describes the settings to acquire the data required for troubleshooting.

You can automatically acquire the data required for troubleshooting by default settings, but you must set up a part of the data before starting operations. You can also change the output destination and the log size that is set up by default.

For the information to be acquired when trouble occurs, you must specify the settings before starting the operations to acquire the following information:

• JavaVM log (JavaVM log file)
  The JavaVM garbage collection log is also output to this file.
  
• User dump (in Windows)
• core dump (in UNIX)
• OS statistical information (in Windows)

Specify the settings to acquire this information at system configuration time as required.

The following table describes the organization of this chapter.

Table 3-1 Organization of this chapter (Troubleshooting (Data acquisition settings))

Category	Title	Reference
Explanation	Overview of data acquisition settings	3.2
Settings	Execution environment settings	3.3

For overview of troubleshooting, data output methods and output contents, see the respective sections:

• Overview of troubleshooting and methods to output the data automatically
  2. Troubleshooting
  
• Output destination of collected data and methods to output data separately
  4. Output Destinations and Output Methods of Data Required for Troubleshooting
  
• Contents output in data
  5. Problem Analysis