esx.problem.net.heap.belowthreshold

Summary

Heap free size dropped.

Causes

Review the exact description to establish the cause of the event.

Resolutions

Consider increasing the amount of heap memory. Refer to this VMware KB article for more information.

Review VMware online documents such as vSphere Networking Guide and  vSphere Troubleshooting Guide to resolve host network issues.

External

Refer to the VMware Online Documentation for more information on vCenter event messages and possible solutions.