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NetCrunch Self Monitor

Read about how NetCrunch monitors itself.

NetCrunch Server is like any complex application with multiple processes, lots of data processing, and high demand for storage. In fact, NetCrunch has multiple logs and monitors thousands of parameters.

These parameters are essential when diagnosing potential performance problems. Be aware: the program is always limited to the hardware capabilities it's running on.

So, NetCrunch Self Monitor is the monitor that watches the NetCrunch Server.

Some programs merely hide problems, which is troublesome, mainly because it creates the illusion that something is working when in actuality, it's not. It's hard to detect and impossible to solve when there is no visible problem. Most problems are caused by overloading - NetCrunch Server overloading or monitored device overloading. Many Cisco devices have protection against too many monitoring requests sent to the device. In many cases, the solution is simple: increasing monitoring time or timeouts.

The status of the NetCrunch server is available on the NetCrunch Server Status dashboard.

Alerts

Settings Alerting & Notifications Monitoring Packs and Policies Global NetCrunch Self Monitor

The global monitoring pack contains default alerting settings for this monitor, and they trigger Default action.

NetCrunch alerts on:

  • (Critical) SNMP monitoring heavily overloaded
  • (Warning) SNMP monitoring overloaded
  • (Warning) Network Services monitoring overloaded
  • (Critical) Database overloaded. Some events have been dropped
  • (Warning) Writing to the database is slow
  • (Critical) Low disk space (< 512MB). Please free up some space on the NetCrunch data disk.
  • (Warning) Low disk space (< 1GB. Please free up some space on the NetCrunch data disk.
  • (Critical) The system is low on memory (< 512MB)
  • (Critical) Virtual memory for NetCrunch Server fragmented. Performance might be negatively affected. A machine restart is required.
  • (Warning) Physical Segments not refreshed on time
  • (Warning) Database size is close to maximum capacity
  • (Warning) System is running for too long
  • (Warning) Server handle usage too high
  • (Warning) Atlas backup had been executed more than two days ago
  • (Critical) the Last backup failed
  • (Warning) Limit of licensed nodes nearly reached
  • (Critical) NetCrunch license is about to expire
  • (Warning) New NetCrunch version available
  • (Warning) NetCrunch maintenance subscription is about to expire
  • (Critical) NetCrunch trial period is about to expire