Recommended level for operational data
Operational events, such as program startup, normal termination, validation of configuration files, and successful requests to servers, are output to the log.

These entries are output as Information to syslog.

Entries, such as failed requests to servers, are output to this log.

These entries are output as Warning to syslog.

Entries, such as notification of inability to operate correctly, failure to validate configuration files, and fatal errors, are output to this log.

These entries are output as Error to syslog.