KVM虚拟化以内存、CPU调整

增大虚拟内存、增长虚拟CPU个数

增大虚拟机内存、增长虚拟机CPU个数须要首先关机虚拟机

1. 关闭虚拟机

virsh shutdown WMS-test-1

2. 编辑虚拟机配置文件
   修改内存大小、vcpu个数

#virsh edit WMS-test-1
<domain type='kvm'> <name>WMS-test-1</name> <uuid>67f9c89c-fcb2-6cd3-27c1-de7799d1db92</uuid> <memory unit='KiB'>8192000</memory> <currentMemory unit='KiB'>8192000</currentMemory> <vcpu placement='static'>4</vcpu>

3. 从配置文件中启动虚拟机

virsh create /etc/libvirt/qemu/WMS-test-1.xml

4. 查看当前内存大小

[root@mryx-kvm1 soft]# virsh dominfo WMS-test-1|grep memory Max memory: 8192000 KiB Used memory: 8192000 KiB

5. 调小虚拟机内存
   调小虚拟机内存无需重启

virsh setmem WMS-test-1 1024000

6. 验证内存与CPU

[root@mryx-kvm1 soft]# virsh dominfo WMS-test-1|grep memory Max memory: 8192000 KiB Used memory: 1024000 KiB [root@mryx-kvm1 soft]# virsh dominfo WMS-test-1|grep CPU CPU(s): 4 CPU time: 25.4s