I recently started a new job in a company and this one has a VM structure that includes some hosts ESXi 6.0. One of these ESXi hosts is too much slow (really, really slow). Whenever I try to install a VM, this installation takes a long time to finish. For example: I've just tried to install a VM with Windows Server 2012. It started to install about one hour and a half time ago, and so far it didn't finish. Another example: A few days ago, I tried to deploy vCenter Server on this host, but it didn't work properly. The message was "A problem occurred during RPM installation: Timeout". Detail: This process took all day long. Others hosts don't have this problem.
What can I do to fix this problem?
Two things you must have when deploying vCSA:
Without these two things the deployment will not succeed.
Thanks for answering. So, I just checked these configurations, and everything is Ok. Actually, deploying VCSA is one the issues that it is happening. Anything that I do is very, very, very slow. When I log on a Windows Server VM for example, when I click an icon, it takes a long before opening the program...all of vms in this host show up this behavior...it's weird...
There are too many variables to know why. Some possibilities include incorrect multi-pathing on this host; suboptimal advanced settings, resource contention on this host, hardware/firmware issues depending on what the storage is, etc.
Thank you for helping me.
I'm sorry, I really didn't mention it. I have two hosts ESXi: Both are a Dell PowerEdge R720, 96GB memory, and the DataStores are attached in a VNX 5300 Storage. I have 4 DataStores, each one with 1000 GB space. The connectivity is via Fibre Channel.
So, in the last days, I've been performing some tests. I deployed a VM directly on the host (on the host where the problem occur). This deploy worked well, I didn't have any problem with this. Then, I tried to install the same VM, same configuration, but I did it in one of the datastores attached on the host (obs.: All of the datastores are attached on both hosts), and...surprise: this VM ran too much slowly. I am thinking this problem is occurring the communication between Host and Storage...but I don't know which problem it is...I'm trying discovering it...however, I don't have too much experience with physical adapters and storage...
Well, the prints below are about the vmkernel.log e vmkwarning.log. The host 224 is the host where the problem is occurring. The host 223 is ok. I think something wrong is happening with vmhba66 (in a comparison between Host223 e Host224) on the host 224:
Host 223 (Host ok):
Host 224 (Host with issues):