KVM虚拟化之内存、CPU调整

增大虚拟内存、增加虚拟CPU个数

增大虚拟机内存、增加虚拟机CPU个数需要首先关机虚拟机

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