I have two xen hosts -
host1 is 32bit, 16Gb RAM, running 12.1+updates, kernel 3.1.9-1.4-xen.
host2 is 64bit, 32Gb RAM, also 12.1+updates, kernel 3.3.0-2-xen.
dom0 on host1 boots fine in 256Mb, but for host2 I need 512M.
It's not a problem as such, but I'm curious as to why?
I've also noticed that the virtual footprints of a few processes
are significantly different from host1 to host2:
Host2:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2769 root 20 0 705m 20m 1508 S 0 4.1 0:02.94 xend
2768 root 20 0 123m 12m 784 S 0 2.5 0:00.00 xend
2770 root 20 0 181m 7224 7052 S 0 1.4 0:00.31 blktapctrl
1 root 20 0 37180 4160 1916 S 0 0.8 0:00.89 systemd
2471 root 20 0 4094m 3848 2788 S 0 0.8 0:00.11 console-kit-dae
2543 root 20 0 184m 3052 2516 S 0 0.6 0:00.08 polkitd
882 root 20 0 315m 1456 1032 S 0 0.3 0:00.13 rsyslogd
Host1:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5023 root 20 0 71260 10m 1644 S 0 4.1 0:00.90 xend
5022 root 20 0 13952 7788 836 S 0 2.9 0:00.00 xend
2066 root 20 0 90160 3292 2644 S 0 1.2 0:00.06 console-kit-dae
2133 root 20 0 24304 2716 2328 S 0 1.0 0:00.60 polkitd
1 root 20 0 5148 2548 1856 S 0 0.9 0:00.62 systemd
735 root 20 0 40116 1260 948 S 0 0.5 0:00.10 rsyslogd
For instance, xend on host2 appears to have a virtual footprint
of more than 10 times that of xend on host1. Is this is really
just due to 32 vs 64bit architecture?
--
Per Jessen, Zürich (16.4°C)
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