update freebsd, related projectes#759

howto/VMs-procedures/freebsd.md

@@ -1,5 +1,3 @@
-
-- Do not use ZFS inside a VM, it works badly
 - ~~Do not enable qemu-agent, with qemu-agent enabled, it tries to send the shutdown signal through it, without it, it does it through acpi. Right now, there is no clear support for qemu-agent~~ [qemu-guest-agent](https://www.freshports.org/emulators/qemu-guest-agent) works fine on FreeBSD 13
 - Hot plugged virtio interfaces are not seen, `reboot`
 - Network configuration cannot be reload, you should restart:
@@ -22,7 +20,9 @@ mini rosetta code linux-freebsd ([more](https://github.com/AnotherKamila/linux2b
 
 - rootfs 10 GB
 - 1 core CPU
-- 512 MB RAM
+- 1 GB RAM
+  - To use ZFS, at least 1 GB of memory is recommended (for all architectures) but more is helpful as ZFS needs lots of memory. Depending on your workload, it may be possible to use ZFS on systems with less memory, but it requires careful tuning to avoid panics from memory exhaustion in the kernel https://wiki.freebsd.org/ZFSTuningGuide
+
 
 # things we put on the freebsd 13 template
 
@@ -43,3 +43,8 @@ pkg install qemu-guest-agent
 reduce autoboot time from 10 seconds to 2 -> src https://www.nesono.com/content/reduce-freebsd-boot-time
 
 Add on file `/boot/loader.conf` a line with `autoboot_delay="2"`
+
+# other resources and references
+
+- [Guifilab] [CAT] En-ruta amb FreeBSD https://www.youtube.com/watch?v=ilcjyybGIK8
+  - guides on installing Freebsd 13