Monitoring Hosts and Servers
Highlight monitors the condition of physical or virtual servers alongside other network devices.
Highlight will collect information on CPU load, memory usage and disk storage space showing the average loading across all cores/processors. Physical memory is also tracked. Highlight will automatically detect up to 16 disks/volumes on the server and track usage for each. Each of these metrics is shown graphically.
As with other monitoring in Highlight, users can view activity for any time period (day, week or month) for the past year and setup alerts if desired. For example, you can set an alert in Highlight to email you if a disk or volume on a server becomes too full.
The monitored thresholds are set to a default value and can be customised at the folder level by admin users for each of the metrics. Exceeding the threshold will make the load or health level drop, eventually change location or service tile colour and generate an alert if this has been set up.
Each poll takes the load of each CPU core and averages that load over the last minute (to a maximum of 32 cores- CPUs beyond 32 will not be included). Highlight currently stores detailed CPU load for each core, but presents a single average through the GUI. Default threshold is 75% for CPU but can be custom defined . Metric impacts Load.
Highlight will display the use of physical memory only, virtual memory is not shown. Default threshold is 80% for memory but can be custom defined . Metric impacts Health.
Disks / Volumes
Highlight discovers all local storage volumes on this host. Each poll reviews the name label, total capacity and utilisation of all locally attached volumes (to a maximum of 16, volumes beyond this will be ignored). For each volume, there is a host disk indicator coloured to show whether the volume was under or over threshold during the selected time period. Default threshold is 80% for disk storage but can be custom defined . Metric impacts Health.
Colours indicate that volume disk storage for the selected time period was:
- Green: under threshold throughout
- Amber: over threshold at some point
- Red: over threshold for 10% or more of the time
Clicking on a volume indicator displays a detailed chart showing disk usage for that period and places a bright blue line under the selected volume.
Highlight host monitoring supports any server that runs the Host Resources SNMP MIB which is shipped as standard on all recent Windows and Linux/Unix systems. Therefore, additional software should not be needed on the server to be monitored.
For Microsoft Windows platforms the SNMP MIB may need to be enabled via “Add Features”. Unix systems and most recent distributions of Linux typically have support for the SNMP and the Host Resources MIB (HRM) installed as standard. If your distribution does not have this support, we suggest installing the Net-SNMP package, which provides SNMP and HRM capability.