High Dom0 memory usage on xen

Portal Home > Knowledgebase > Articles Database > High Dom0 memory usage on xen

Posted by Chris Drew, 11-29-2008, 12:02 PM
High Dom0 memory usage on xen Hi, I'm running hypervm on xen a centos 5 64 bit box. The problem I'm having is that after a couple of hours of uptime Dom0 seems to have used up all of it's available memory i.e: Code: [root@------ ~]# free -m total used free shared buffers cached Mem: 1536 1516 19 0 993 247 -/+ buffers/cache: 275 1260 Swap: 16002 0 16002 I have disabled the memory balloon driver in the xen config and set dom0_mem=1536M in grub.conf, i.e: Code: default=1 timeout=1 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.18-92.1.18.el5) root (hd0,0) kernel /vmlinuz-2.6.18-92.1.18.el5 ro root=LABEL=/ initrd /initrd-2.6.18-92.1.18.el5.img title CentOS (2.6.18-92.1.18.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-92.1.18.el5 dom0_mem=1536M module /vmlinuz-2.6.18-92.1.18.el5xen ro root=LABEL=/ module /initrd-2.6.18-92.1.18.el5xen.img Does anyone have any idea what could be causing this and how i could fix it? I'm also wondering if this is related to the box repeatedly "loosing" all internet connectivity every couple of days. All suggestions appreciated! Regards, Chris