Slow Apt

[TheBearAK <thebearak@xxxxxxxxx>]

First, hello.  New to the list, but I've been using Xen Hypervisor for a 
long time.
I'm curious if anyone else has had this issue.

I recently upgraded a server from Debian Squeeze to Buster with kernel 
4.19.0-16-amd64 and found that apt/aptitude commands are slow in response.
For example, 'apt-get update' can take 10 minutes to complete, hanging 
up on certain parts of the downloads either at 0% or 90%.    This is 
something that normally takes a few seconds.
Even the DomU's suffer the same issue.


On another server I have kernel 4.19.0-14-amd64 and it seems to be 
running just fine most of the time.  I do get some hiccups, but not 
nearly as much as the above upgraded server.

I've also noticed that writes will sometimes pause for several seconds, 
specially when transferring large files.

Setup:

E3-1230 V2 @ 3.30GHz

16 GB RAM

Hard drives are spinning disk.  2 TB drives (EXT4)

DomUs are using Disk.Img for their disk.