High host disk read usage after upgrade to ESXi 5.5

[vm7user]

After upgrade host from ESXi 5.1 to 5.5 host have strange high spikes disk read usage (host itself, no VM). What is it?

see picture:

[nkrishnan]

Can you please detail out the configuration details, also make sure hardware and storage are in HCL. are you observing errors in vmkernel logs

[vm7user]

All hardware in HCL, no errors in vmkernel.log

[elgreco81]

Hi,

I would start by checking what esxtop has to say. (this is a good place to start if you are not familiar with it http://www.yellow-bricks.com/esxtop/)

Seems like for every ten minutes, you have 10 spikes...do you have some scheduled task for every 60 seconds? Is your host suffering any memory contention?

Regards,

elgreco81

[admin]

please check the below URL:

CLI madness part I – performance health check for ESX in 5 minutes | super sonic dog (S.S.D)

Initial screen would show ‘CPU usage across the board.  Type the following key to switch between CPU, memory, HBA adapter, network, LUN, VM virtual disk performance stats:

• c – CPU
• m – memory
• n – network
• d – disk adapter (in our example screenshots below, it’ll be vmhba33/37 depending on which one represents the sw/iscsi adapter)
• u – all LUNs
• v – VMs virtual machine disks (VMDKs)

Quick spot check for CPU usage:

Type ‘c’ to switch to CPU view:

[NavalgundRaj]

Hi,

Have you tried restarting management newtwork?

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Regards

Basavaraj.R Navalgund