Practical limit to number of jails on a given host?

[Hub- FreeBSD]

On 2012-02-06, at 3:29 PM, Doug Barton wrote:

> 
> So first question is, is there some sort of hard-coded limit somewhere?
> If not, what is the largest number of jails that you've created
> successfully/reliably on a system, and what are the specs for that system?

~150 full jails (postfix+cyrus-imapd+apache) on a Quad Core Xeon with 32G of RAM ...

they weren't high load sites, obviously, but loading was generally <1, and the machine was perfectly responsive …