# High CPU ussage because --webservice-sslcertificatefile
**URL:** https://forum.duplicati.com/t/high-cpu-ussage-because-webservice-sslcertificatefile/12600
**Category:** Support
**Created:** [June 22, 2021, 5:42pm UTC](https://forum.duplicati.com/t/high-cpu-ussage-because-webservice-sslcertificatefile/12600 "2021-06-22T17:42:47Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@ragametal](https://forum.duplicati.com/u/ragametal)
#### Post date: [June 22, 2021, 5:42pm UTC](https://forum.duplicati.com/t/high-cpu-ussage-because-webservice-sslcertificatefile/12600/1 "2021-06-22T17:42:47Z")
I’m new to duplicati and i have it installed in my headless UBUNTU server 18.04 machine.
I’m trying to set duplicaty to use https instead of the default http interface.
According to my research, i just need to create an SSL certificate in PKCS#12 format for duplicati to use and and indicate the location of such certificate in the file /etc/default/duplicati by adding the option `--webservice-sslcertificatefile`
The last sentence of that file in my system reads as follows:
```
# Additional options that are passed to the Daemon.
DAEMON_OPTS= "--webservice-interface=any --webservice-port=8200 --portable-mode --webservice-sslcertificatefile=/var/servercertificate/Cerberus.p12"
```
As expected, with these settings Duplicati successfully uses https and my ssl certificate.
However, after i did this, the fans on my server just went wild. I checked the running services with the “top” command and noticed that **mono-seg had a cpu usage between 50-100%** in one of the cores.
So, i went back and deleted the `--webservice-sslcertificatefile`. All of the sudden everything went back to normal but i lost the encrypted connection via https that I was pursuing.
I honestly don’t know if this is a bug or if this is supposed to work this way.
I also noticed that everyone using `--webservice-sslcertificatefile` was also using `--server-mode` instead of the default `--portable-mode` option. I don’t have a clue of the difference between these two options or if using `--server-mode` would solve the high cpu ussage.
Has anybody experienced the described behavior? Or am I the only one?
---
### Author:  [@ragametal](https://forum.duplicati.com/u/ragametal)
#### Post date: [June 27, 2021, 2:26pm UTC](https://forum.duplicati.com/t/high-cpu-ussage-because-webservice-sslcertificatefile/12600/2 "2021-06-27T14:26:45Z")
It seems that this is not a very common problem and that my case is an isolated one.
I will keep investigating and report back if i ever find the answer to this but, I will focus my efforts on how my hardware interfaces with mono since nobody has commented on the software aspect of this.