I am having the weirdest issues with my vSphere environment. I have two identical hosts running a total of 11 vms. All the VMs on host 1 run fine, but the ones on host 2 are slow. If I move one VM from Host 2 to Host 1 it performs fine. Can someone please point me in the right direction on this one? There is no resource contention on either host. The total amount of RAM for all servers combined is under 40 GB. Points will be awarded!!!
Let me add that these are both connected to and EMC NX4. I have two paths to the iSCSI target. I am using 2 HP Procurve 1800-G for iSCSI traffic. These are two separate switches. They are not connected at all. The VMware ESXi is installed on HP Certified 2GB SD disks.
I do have multiple controllers on my NAS and my ESXi hosts. Jumbo frames are on on both switches. I did have single path at first, but that was just during the initial setup and config.
That occurs often on storages with MRU policy (yours) and incorrect configured lun access - path thrashing (by MRU always the same controller).
Also check your storage/lun configuration also.
I am planning on taking the Hosts offline tonight (it's 10:30am EST now.). I will compare BIOS setting and report the information back here. I will also revisit the config and post screenshots as well. I WILL award points to whomever provides me with the most correct answer. I will award helper points.
After going thru the BIOS' on each of the host I noticed some differences in the Power Settings. I modified the setting below to match that of the host that is functioning properly. Now everything is functioning properly on both hosts. I am reviewing the previous posts to see where points should be awarded. Thanks to everyone for the answers.
Power Mgmt Options=>HP Power Profile from Max Power to Balanced Power and Performance
Power Mgmt Options=>HP Power Regulator from HP Static High Performance Mode
to HP Dynamic Power Savings Mode