SAN functionality may become slow or unresponsive.
Issue may progress to full system disruption or unresponsiveness.
Messages similar to the following may be seen:
[Sun May 26 12:37:26 -0400 [Cluster01-01: free_cache_trigger_proc: wafl.memory.statusVeryLowMemory:alert]: WAFL is running very low on memory, with 759MB remaining.]