Free Memory

[TheBearAK <thebearak@xxxxxxxxx>]

Normally when you type 'free' you get an output that shows:


              total        used        free      shared buff/cache   
available
Mem:     9.3Gi       226Mi       5.5Gi       9.0Mi 3.6Gi       8.9Gi
Swap:     15Gi          0B        15Gi


Where total is the total amount of RAM actually installed in the 
machine.   In this case, this is only showing that 9.3Gi.
Checking with cat /proc/meminfo shows the same 9.3Gb of RAM as the Total.


However, checking with "xl info" it shows:

total_memory           : 16356


Yesterday the 'free' command was showing that it only had 4 GB of RAM.   
I rebooted the entire server and brought the 4 VMs back online and it 
showed the total to be 16GB again.
Is this normal?   Seems like a big memory leak.    But I'm wondering if 
it could be that I have some bad memory and it keeps mapping it out on 
the fly.

I do notice that the VMs get slower and slower over time.  Just 
rebooting everything will clear it up, but it slows down over about 2-3 
months time to the point where ssh to them takes 10-15 seconds to connect.