Setting the Log Level

Log levels determine the amount of information delivered in a log. Logs can have one of five levels of detail. A detailed log-level setting creates larger log files and has a greater impact on system performance than an abbreviated log-level setting. A detailed log-level setting includes all the messages contained in the abbreviated log-level settings, plus additional messages. As the level of detail increases, system performance decreases.

Note	You can specify different logging levels for each log type.

Log Levels
Log Level	Description
Critical	Only errors are logged. This is the most abbreviated log-level setting. At this log level, you cannot monitor performance and important appliance activities; however, the log files do not reach maximum size as quickly as they do at a detailed log level. This log level is analogous to the syslog level Alert.
Warning	All system errors and warnings are logged. At this log level, you cannot monitor performance and important appliance activities. The log files reach maximum size more quickly than they do at the Critical log level. This log level is analogous to the syslog level Warning.
Information	Second-by-second operations of the system are logged. For example, connections opened and delivery attempts are logged. The Information level is the recommended setting for logs. This log level is analogous to the syslog level Info.
Debug	More detailed information is logged than at the Information log level. Use the Debug log level when you are troubleshooting an error. Use this setting temporarily, and then return to the default level. This log level is analogous to the syslog level Debug.
Trace	All available information is logged. The Trace log level is recommended only for developers. Using this level causes a serious degradation of system performance and is not recommended. This log level is analogous to the syslog level Debug.