| Log Level | Indicates |
|---|---|
| EMERGENCY | Critical problem that might make the system unusable. |
| ALERT | Noncritical problem that might cause the NetScaler appliance to function incorrectly. You must take immediate corrective action to prevent the appliance from experiencing a critical problem. |
| CRITICAL | Critical condition that does not restrict operation but might escalate to a larger problem. |
| ERROR | Failure of a NetScaler operation. |
| WARNING | Issue that might result in critical errors. |
| NOTICE | Same as INFORMATION, but in greater detail. |
| INFORMATION | Any action taken by the NetScaler appliance. This level of logging can help troubleshoot problems on the Citrix NetScaler product line. |
| DEBUG | Extensive, detailed information. Developers use this level of logging to troubleshoot problems. |
原文：https://www.cnblogs.com/i-dark/p/9142401.html