@olivierlambert

NIC:
Intel(R) Ethernet 10G 2P X550-t Adapter

driver: ixgbe
version: 5.5.2
firmware-version: 0x80000f32, 19.5.12

RAID Controller:

Product Name    : PERC H740P Adapter 
Serial No       : 04B00V9
FW Package Build: 50.9.4-3025

                    Mfg. Data
                ================
Mfg. Date       : 04/18/20
Rework Date     : 04/18/20
Revision No     : A03
Battery FRU     : N/A

                Image Versions in Flash:
                ================
Boot Block Version : 7.02.00.00-0021
BIOS Version       : 7.09.02.1_0x07090301
FW Version         : 5.093.00-2856
NVDATA Version     : 5.0900.06-0034

I know our hardware is not fully up to date, but for an update we need a timeframe, which can not be arranged that quickly.
Maybe someone knows a temporary fix to reduce the usage of the dom0 memory until the updates can be made.

@olivierlambert

It is a Dell PowerEdge R440 Version 2.6.3 with an LACP Bond and we use an NFS Storage.

Hey Guys,

we are facing the same issue with xcp 8.1.
We can't figure out what uses all this memory (8GB) or how to reduce it. Restarting the Toolstack did nothing and we can't afford a downtime because everything runs in production. Similar systems with same configurations don't show such a behavior.

I can provide you with some output from our system, maybe you can see something or help us finding a solution.

free -m

              total        used        free      shared  buff/cache   available
Mem:           7912        7595          82          33         234          62
Swap:          1023         216         807

xl top

      NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO    VBD_RD     VBD_WR   VBD_RSECT   VBD_WSECT SSID
  Domain-0 -----r    7308446   52.1    8388608    3.1    8388608       3.1    16    0        0        0    0        0         0          0           0           0    0

xe vm-param-list uuid | grep memory

                         memory-actual ( RO): 8589934592
                         memory-target ( RO): <unknown>
                       memory-overhead ( RO): 84934656
                     memory-static-max ( RW): 8589934592
                    memory-dynamic-max ( RW): 8589934592
                    memory-dynamic-min ( RW): 8589934592
                     memory-static-min ( RW): 8589934592
                                memory (MRO): <not in database>

lsmod and grub.cfg
lsmod.txt
grub-cgf.txt

top output

Tell me if you need more information or if you have any idea. Thanks.