I am getting critical swap usage alert in one of the monitoring tool called nagios.
1) However when I went to the host from vCenter and checked the memory utilization from the cluster, the respective host memory utilization is only 66%
Also I went to performance tab of a host, when i selected memory, it shows a 1 min high spike and suddenly it went down.
My question is how do I identify, which VM is using more swap on this Host or what is the cause of that high spike?
2) From ESXi command line, esxtop "m" output shows the below
SWAP /MB: 123 curr, 122 rclmtgt: 0.00 r/s, 0.00 w/s
which means it is using 123 MB swap and reclaim memory is 0.
My query is, when I can see it is showing 66% utilization of Memory, then why it is using swap? and I am not sure, how do I avoid to such situation in future?
Can anybody please, I have searched and didn't found anything relevant.
