AutoSupport Message: 'System memory is very low' on Element software 12.0 and above

memoryUsageThreshold error code appears one or multiple times as either:

Error status with details:
- System memory is very low. Adding additional nodes or manually purging deleted volumes may help reduce memory usage.
Warning status with details:
- System memory is low. Adding additional nodes or manually purging deleted volumes may help reduce memory usage.
If this situation continues, it can also lead to other alerts such as:
- nodeOffline The SolidFire Application cannot communicate with Storage node having node ID <X>.