Virtual Memory Swapping
When the processes running on your server attempt to allocate more memory than your system has available, the kernel begins to swap memory pages to and from the disk.
This is done in order to free up sufficient physical memory to meet the RAM allocation requirements of the requestor.
Wormly monitors the number of pages being swapped to and from the disk over time. It presents this information with the following trend graph:
Virtual Memory swapping is an “expensive” activity in terms of its impact on overall system performance. If processes on your system regularly attempt to allocate more than the available physical RAM, you may experience drastic increases in web site response times and loss of execution speed.
Unfortunately only two solutions exist - either optimize your applications to utilize memory more efficiently, or add more physical RAM to the system.
Performance Graphs
Internal metrics
External metrics
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