On Sunday, 17 January 2021 2:20:13 PM AEDT Peter Hall via luv-main wrote:
> I tried to do a similar Mailman 2 -> 3 upgrade and ended up rolling back to
> Mailman 2 even though it is unsupported.
>
> Mailman 3 has much higher minimum memory requirements than Mailman 2. If
> the server is memory bound you might run into some trouble.

Thanks for the information, are there any other problems you encountered apart
from RAM use?

The system running the LUV VM has 48G of RAM and has 24G of that allocated to
VMs.  There are some things running on the Dom0, but no fraction of 24G.  I
could easily add more RAM to the LUV VM if needed.

As an aside RAM is getting significantly larger and cheaper.  DDR4 DIMMs are a
maximum of 64G while DDR3 DIMMs are a maximum of 16G.  Servers with DDR4 tend
to have about 4* the RAM of servers with DDR3.  Hetzner (the company hosting
the hardware that runs the LUV VM) doesn't offer new servers with less than
64G of RAM.  I recently got a quote on hosting in Australia and was offered a
blade server with 256G!

Recently a client needed a PSU and a fan replaced in an IBM rack mounted
server, they bought a server on ebay for $200 which was cheaper than buying
the parts they need new.  The $200 server has 64G of RAM.

RAM is getting ridiculously large.

https://cloud.google.com/compute/vm-instance-pricing

The GCP offers VMs with as much as 11776GB on a special deal!  But for the
regular VMs (which offer deeply discounted "preemptible" prices) the largest
seems to be just under 1TB of RAM.

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