[Xen-users] does dom0 baloon memory?

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

Hi

I've noticed that my machine becomes unstable from time to time. 
Currently it's running CentOS 5.1 x64 + Xen 3.1 and 1 domU. The dom0 
runs Apache, PHP & MySQL for cacti / graphing, and the domU is a cPanel 
VPS.
I can't see where / how dom0's memory limit is set, yet I often see it 
only having 5MB RAM left.

[root@venus ~]# free -m
            total       used       free     shared    buffers     cached
Mem:           513        467         45          0         43        213
-/+ buffers/cache:        210        302
Swap:         2047          0       2047
[root@venus ~]# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0      513     1 r-----   1416.1
vm01                                       3      511     2 -b----    348.1


This is just after a restart


xentop - 22:32:49   Xen 3.1.0-53.1.21.el5
2 domains: 1 running, 1 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
Mem: 4183548k total, 1131112k used, 3052436k free    CPUs: 2 @ 2666MHz
     NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) 
MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSI
D
 Domain-0 -----r       1416    0.1     525892   12.6   no limit       
n/a     2    4   111435    32837    0        0        0        0
0
     vm01 --b---        348    0.1     524120   12.5    2097152      
50.1     2    1    39773    15732    0        0        0        0

After running for a while the memory on dom0 is very little, and it's a 
bit slow. How do I increase the max mem for dom0 ?

--

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other 
technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff


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