If you face this kind of issue in centos or ubuntu
Cannot open /var/log/sysstat/sa27: No such file or directory
Please check if data collecting is enabled
First you need to check configuration in below path
vi /etc/default/sysstat
change it as true in the place of false as shown below.
ENABLED="false" TO ENABLED="true"
once above changes done, you need to restart the sysstat service .
sudo service sysstat restart