How to reduce swap in lvm

How to reduce swap in lvm

1. check lvs 

lvs

  swap_vol    sysvg -wi-ao----   8.00g  

2. check in which /dev/ directory is

ls -l /dev/mapper/*

3. swapoff

swapoff -v /dev/mapper/sysvg-swap_vol

4. lvreduce 

lvm lvreduce /dev/mapper/sysvg-swap_vol -L -6G

5. check lvs

lvs

6. make swap 

mkswap /dev/mapper/sysvg-swap_vol

7. turn on swap

swapon -va

8. check swap 

cat /proc/swaps

free -h

source: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/deployment_guide/s1-swap-removing