[root@rac02 ~]# vgdisplay
--- Volume group ---
VG Name VolGroup
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 49.51 GiB
PE Size 4.00 MiB
Total PE 12674
Alloc PE / Size 7680 / 30.00 GiB
Free PE / Size 4994 / 19.51 GiB
VG UUID HYL3bE-tccs-SUil-i75E-qUqG-d6dD-6jzj2u
[root@rac02 ~]# vgextend VolGroup /dev/sdc
Volume group "VolGroup" successfully extended
[root@rac02 ~]# vgdisplay
--- Volume group ---
VG Name VolGroup
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 57.50 GiB
PE Size 4.00 MiB
Total PE 14721
Alloc PE / Size 7680 / 30.00 GiB
Free PE / Size 7041 / 27.50 GiB
VG UUID HYL3bE-tccs-SUil-i75E-qUqG-d6dD-6jzj2u
这里逻辑卷组扩容完毕，后面可以重复1——5步骤完成swap扩容。