Solved

Slow Performance on VMs

Posted on 2014-04-17
1
328 Views
Last Modified: 2014-04-17
For the past few days I have been experiencing very strange network behavior.  After some testing today, it SEEMS like there is severe network lag between my VMs and my physical devices.  All devices are on a single network.  

Virtual machines are setup to carry workloads between the physical SQL Servers and the File Server.  

I had a problem with one of the NICs on one of my ESX hosts a while ago and I was wondering if that could contribute to this.

Also, would adding Link Aggregation between the ESX hosts and the FW and Switches increase my bandwidth internally?  Is there something on the ESXi I should be looking for?  

Any insight is much appreciated.  

If you need more information please let me know and thanks in advance for your help.
0
Comment
Question by:lipotech
1 Comment
 
LVL 119

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40007635
What networking interfaces are you using in the VMs, these should be VMXNET3, not the older legacy E1000.

How do you have your hosts configured, do you have more than a single host, are all VMs and hosted affected?

What do performance counters state?

Load Balancing, Teaming could help, if configured correctly, but you need to know first utilization levels on your nics?

One of the biggest management holes in vCenter of ESX is the vSphere Client can indicate that VM network traffic is causing a 1 GB Ethernet adapter to have a 99% utilization rate. But strangely, it doesn't display which kind of traffic is going across the virtual networks, where it came from or where it's going.

To learn which traffic is going across a virtual network, there's another free tool for vSphere: Xangati for ESX, a virtual appliance that tracks conversations on the virtual network. It's great for troubleshooting any virtual network issue, analyzing virtual desktop infrastructure and correlating vCenter performance stats with virtual network stats.

and then you can really check what traffic from your VMs for free is causing network issues.

It's available as a fanastic FREE download here.

http://xangati.com/try-it-free/
0

Featured Post

Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
ESXi 4.1.0 host unreachable every morning 1 63
VMWare environment audit 8 71
Remove Disconnected ESX Hosts 3 59
Remote access to ESXi 6 free with USB modem 5 57
Will try to explain how to use the VMware feature TAGs in the VMs and create Veeam Backup Jobs using TAGs. Since this article is too long, I will create second article for the Veeam tasks.
Last article we focus in how to VMware: How to create and use VMs TAGs – Part 1 so before follow this article and perform the next tasks, you should read the first article how to create the TAG before using them in Veeam Backup Jobs.
Teach the user how to use configure the vCenter Server storage filters Open vSphere Web Client:  Navigate to vCenter Server Advanced Settings: Add the four vCenter Server storage filters: Review the advanced settings: Modify the values of the four v…
This video shows you how easy it is to boot from ISO images for virtual machines with the ISO images stored on a local datastore on the ESXi host.

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question