1、關閉虛擬機

virsh shutdown kvm109#調整前 [root@0830 ~]# virsh dominfo kvm109 Id: - Name: kvm109 UUID: 658ba60c-505a-435a-967b-276d84620930 OS Type: hvm State: shut off CPU(s): 1 Max memory: 1048576 KiB Used memory: 1048576 KiB Persistent: yes Autostart: disable Managed save: no Security model: none Security DOI: 0

2、編輯虛擬機

virsh edit kvm109<name>kvm109</name> <uuid>658ba60c-505a-435a-967b-276d84620930</uuid> <memory unit='KiB'>2097152</memory> #調整內存至2G <currentMemory unit='KiB'>2097152</currentMemory> #調整內存至2G <vcpu placement='static'>2</vcpu> #調整CPU核數為2

3、重新定義使配置文件生效

virsh define /etc/libvirt/qemu/kvm109.xml

4、啟動虛擬機

virsh start kvm109#調整后 [root@0830 ~]# virsh dominfo kvm109 Id: 3 Name: kvm109 UUID: 658ba60c-505a-435a-967b-276d84620930 OS Type: hvm State: running CPU(s): 2 #CPU 為2核 CPU time: 12.3s Max memory: 2097152 KiB #內存 為2G Used memory: 2097152 KiB Persistent: yes Autostart: disable Managed save: no Security model: none Security DOI: 0

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總結

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