Use Disk and CPU in very high droplet Digital Ocean .. As the image the Sentora is u

Use Disk and CPU in very high droplet Digital Ocean ..

As the image the Sentora is using too much CPU and disk of my VPS in Digital Ocean:
1 GB Memory / 20GB Disk / nyc2 - CentOS 7.0 x64

I currently 8 sites, including 6 html5 + css3 and 2wordpress ...

What can I do to optimize the use of resources of VPS?
Increase the capacity of the VPS?
Has another VPS hosting best for sentora?
The version 1.0.3 ... is sentora

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