So here is one that I can't seem to figure out.
I recently spun up a new 6.7 host on new hardware and am getting very bad download speed from the internet (either updates, or just file downloads from a browser.) downloads will quickly drop from multiple MB/s down to 4-8kbps within seconds, and then just stay there on multiple VM's both windows and linux.
It is not a slow mirror issue, It happens with all files on the VM, and I downloaded the same file from a non-VM machine:
from the same mirror that I did from a VM:
If I transfer files to/from a shared drive on one of the VM's I get >100MBps (which maxes out the 1Gbps NIC) sustained throughout the transfer, so it doesn't seem to be a network or disk issue.
If I run a browser speedtest or iPerf test on a VM, it easily hits a good speed, with iPerf showing 800+ Mbps up and down to public servers, while downloads still seem to stall at 10kbps.
At the same time streaming video on a VM has no issues (and youtube stats show 100+mbps 'connection speed) It's only when downloading a file that the issue seems to crop up.
I have been running a Ubuntu install and it has been trying to download updates for over an hour (with 84 minutes remaining on the timer for downloading a language pack) on a WAN connection where the bottleneck is the 1Gbps connection to the server.
I see no impact on the VM's performance wise (installing already downloaded files, running tasks, booting etc) I just can't download files.
Torrents run at full speed:
But trying to wget a file shows things go slow so it is not just a browser thing:
VMTools are installed
Anyone seen anything like this before? It is a new one for me.
And yes I realize all of these examples are of the same file. Just to reiterate, on the VM's this is happening with all downloads regardless of source on the VM's
More information:
Issue seems to be TCP related, but I don't know the cause.
Getting vsish stats for the interfaces show no dropped packets:
But Wireshark analysis shows periods of time where it is only receiving 1-3 packets a second interspersed between short periods of normal function:
So I am still not sure what is going on
Slow speed can be observed directly on the ESXI server with wget.
NIC is Intel 4P x540/i350 rNDC, using native VMW drivers
What was the solution? I am have the same exact issue, except when I run speed test on one of my VMs, my download speed is very slow but upload is full speed.
same here
Please do not reply to old threads that are months and years old.
"same here" is nothing that anyone can respond to in a helpful manner.
Open a new thread instead and provide a description of your issue, system setup etc.
Moderator: Locking thread.