The client has also configured a small Swap mountpoint, when looking at all memory available on the server. Oracle documentation says this:
The VM has 116GB memory, and 32GB reserved for HugePages. The actual swap mountpoint is 4GB big and, based on the Oracle Server Configuration Checklist for 19c, the swap mountpoint should be in this case 16GB.
I’m using Oracle Linux 9, xfs filesystems. I’ll increase the swap mountpoint online, with the databases running.
Please check the previous two posts for information on Extending other partitions types:
- Part 1 – extend mountpoint alone in a block device (/u02 in the table below) – more detailed explanations
- Part 2 – extend a specific mountpoint within several partitions in a block device (/u01 in the table below)
Increase swap mountpoint from 4GB to 16GB
The current status can be checked using both parted and lsblk. Parted uses base10 units which shows the as 831GB big, while lsblk uses base2 units, showing the /dev/sda as 774GiB big. From this only ~84GB are mapped (“End” of parted output). This means we have a lot of free disk, no action is needed in VMWare (see Part 1 blog post for more on this).?
[root@vmware-vm01 ~]# parted /dev/sda print
Model: VMware Virtual disk (scsi)
Disk /dev/sda: 831GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 263MB 262MB fat16 EFI System Partition boot, esp
2 263MB 1337MB 1074MB xfs
3 1337MB 84.0GB 82.7GB lvm
[root@vmware-vm01 ~]# lsblk -p /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
/dev/sda 8:0 0 774G 0 disk
├─/dev/sda1 8:1 0 250M 0 part /boot/efi
├─/dev/sda2 8:2 0 1G 0 part /boot
└─/dev/sda3 8:3 0 77G 0 part
├─/dev/mapper/ol_vmware-vm01-root 252:0 0 10G 0 lvm /
├─/dev/mapper/ol_vmware-vm01-swap 252:1 0 4G 0 lvm [SWAP]
├─/dev/mapper/ol_vmware-vm01-var_log_audit 252:2 0 1G 0 lvm /var/log/audit
├─/dev/mapper/ol_vmware-vm01-u01 252:3 0 50G 0 lvm /u01
├─/dev/mapper/ol_vmware-vm01-home 252:4 0 5G 0 lvm /home
├─/dev/mapper/ol_vmware-vm01-var_log 252:5 0 2G 0 lvm /var/log
└─/dev/mapper/ol_vmware-vm01-var 252:6 0 5G 0 lvm /var
The Swap mountpoint is in the /dev/sda3 partition, which have several logical volumes. I need first to increase the size of this partition at least by 12GiB (about 13GB) to hold a bigger swap mountpoint.
[root@vmware-vm01 ~]# parted /dev/sda "resizepart 3 100G"
Information: You may need to update /etc/fstab.
[root@vmware-vm01 ~]# lsblk -p /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
/dev/sda 8:0 0 774G 0 disk
├─/dev/sda1 8:1 0 250M 0 part /boot/efi
├─/dev/sda2 8:2 0 1G 0 part /boot
└─/dev/sda3 8:3 0 91.9G 0 part
├─/dev/mapper/ol_vmware-vm01-root 252:0 0 10G 0 lvm /
├─/dev/mapper/ol_vmware-vm01-swap 252:1 0 4G 0 lvm [SWAP]
├─/dev/mapper/ol_vmware-vm01-var_log_audit 252:2 0 1G 0 lvm /var/log/audit
├─/dev/mapper/ol_vmware-vm01-u01 252:3 0 50G 0 lvm /u01
├─/dev/mapper/ol_vmware-vm01-home 252:4 0 5G 0 lvm /home
├─/dev/mapper/ol_vmware-vm01-var_log 252:5 0 2G 0 lvm /var/log
└─/dev/mapper/ol_vmware-vm01-var 252:6 0 5G 0 lvm /var
And resize the Physical Volume:
[root@vmware-vm01 ~]# pvresize /dev/sda3
Physical volume "/dev/sda3" changed
1 physical volume(s) resized or updated / 0 physical volume(s) not resized
Next, it is needed to deactivate temporarily swap. This should not be a problem when we have enough free memory. This operation takes a while.
[root@vmware-vm01 ~]# swapoff -a
[root@vmware-vm01 ~]# free -h
total used free shared buff/cache available
Mem: 114Gi 39Gi 1.5Gi 561Mi 74Gi 74Gi
Swap: 0B 0B 0B
Now that swap mountpoint is not used, I can extend the size of the logical volume.
[root@vmware-vm01 ~]# lvextend --size +12G /dev/mapper/ol_vmware-vm01-swap
Size of logical volume ol_vmware-vm01/swap changed from 4.00 GiB (1024 extents) to 16.00 GiB (4096 extents).
Logical volume ol_vmware-vm01/swap successfully resized.
[root@vmware-vm01 ~]# lsblk -p /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
/dev/sda 8:0 0 774G 0 disk
├─/dev/sda1 8:1 0 250M 0 part /boot/efi
├─/dev/sda2 8:2 0 1G 0 part /boot
└─/dev/sda3 8:3 0 91.9G 0 part
├─/dev/mapper/ol_vmware-vm01-root 252:0 0 10G 0 lvm /
├─/dev/mapper/ol_vmware-vm01-swap 252:1 0 16G 0 lvm
├─/dev/mapper/ol_vmware-vm01-var_log_audit 252:2 0 1G 0 lvm /var/log/audit
├─/dev/mapper/ol_vmware-vm01-u01 252:3 0 50G 0 lvm /u01
├─/dev/mapper/ol_vmware-vm01-home 252:4 0 5G 0 lvm /home
├─/dev/mapper/ol_vmware-vm01-var_log 252:5 0 2G 0 lvm /var/log
└─/dev/mapper/ol_vmware-vm01-var 252:6 0 5G 0 lvm /var
And finally I can enable swap again. This means, assign the logical volume to swap usage:
[root@vmware-vm01 ~]# mkswap --label SWAP /dev/mapper/ol_vmware-vm01-swap
mkswap: /dev/mapper/ol_vmware-vm01-swap: warning: wiping old swap signature.
Setting up swapspace version 1, size = 16 GiB (17179865088 bytes)
LABEL=SWAP, UUID=98a8b003-d33e-4c28-b1db-13b98b95ff4c
[root@vmware-vm01 ~]# swapon -a
Final result is here:
[root@vmware-vm01 ~]# free -h
total used free shared buff/cache available
Mem: 114Gi 39Gi 1.9Gi 561Mi 74Gi 74Gi
Swap: 15Gi 0B 15Gi
[root@vmware-vm01 ~]# lsblk -p /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
/dev/sda 8:0 0 774G 0 disk
├─/dev/sda1 8:1 0 250M 0 part /boot/efi
├─/dev/sda2 8:2 0 1G 0 part /boot
└─/dev/sda3 8:3 0 91.9G 0 part
├─/dev/mapper/ol_vmware-vm01-root 252:0 0 10G 0 lvm /
├─/dev/mapper/ol_vmware-vm01-swap 252:1 0 16G 0 lvm [SWAP]
├─/dev/mapper/ol_vmware-vm01-var_log_audit 252:2 0 1G 0 lvm /var/log/audit
├─/dev/mapper/ol_vmware-vm01-u01 252:3 0 50G 0 lvm /u01
├─/dev/mapper/ol_vmware-vm01-home 252:4 0 5G 0 lvm /home
├─/dev/mapper/ol_vmware-vm01-var_log 252:5 0 2G 0 lvm /var/log
└─/dev/mapper/ol_vmware-vm01-var 252:6 0 5G 0 lvm /var