Quick and easy fix for problems with Plesk Server Health Monitor

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Have you ever thought about your Server’s Health? If not, it’s time to start thinking about the health of the server.

Only a healthy server can host websites without downtime.

Server Health Monitor helps you to keep your server updated and allows you to work smoothly.

That’s why we often get customer requests to install “Plesk Server Health Monitor” as part of our Technical Support Services.

Today, let’s see the relevance of the “Plesk Server Health Monitor” and how Bobcares’ Engineers fix common errors.



What is “Server Health Monitor”?

Let’s see more details on Server Health Monitor.

Plesk Server comes with a utility like “Server Health monitor”. It provides a complete overview of the status and performance of individual servers. In addition, it helps to keep your Plesk installation running smoothly by checking the system resource usage on the server. Moreover, Server Health Monitoring will notify when a predefined threshold value of resources has exceeded.

Furthermore, our Support Engineers make use of alerts from Server Health monitor tool in Plesk to avoid downtime too.



How Server Health Monitor In Plesk helps?

Recently, one of our customers came to us with a request to fix his “website not loading” problem. The customer claimed that all worked well, except that his website just keeps loading and shows a blank page.

On a detailed search, our Support Engineers figured out the root cause of website error as lack of memory space in the server.

Let’s now check the steps that helped our Dedicated Engineers to identify the issue.

1. Accessed the Plesk control panel of the server.

2. By using the Plesk Server Health Monitor tool, we identified a memory leak every 2-3 hours.

3. Again, our Support Engineers used back-end command utility like “htop” to identify the service that was using more memory.

4. Further, we checked the memory and the swap available on the server by using command.

free -m

The server did not have enough memory resources in the server and that was causing the problems. We fixed the issue by suggesting memory upgrades to the customer.


Installing Plesk Server Health Monitor

Health Monitor comes as an optional component in Plesk. It can be easily setup by Plesk installer.

Server Health Monitor helps to get a detailed report of the server health. That’s why, we always install it during the new Plesk server provisioning.


Error when trying to install Server Health Monitor In Plesk

From our experience in managing servers, we often see customers experiencing problems when installing Server Health Monitor utility in Plesk. Let’s check an example for this.

One of our customers received the following error message when trying to install the Server Health Monitor.

The following packages have unmet dependencies:
psa-health-monitor : Depends: plesk-core (>= 17.0.17) but it is not going to be installed

Immediately, the customer contacted us. Then, we began troubleshooting by analyzing the log file"/var/log/plesk/install/plesk_17.0.17_installation.log"to find out what went wrong.

1. From the error, our Support Engineers identified that the package dependencies were missing. The customer was using  non-standard repositories in /etc/apt/sources.list file. As a result, the system was not able to resolve all the dependencies properly.

2. Then, we replaced all the contents of the file /etc/apt/sources.listwith the default content.

3. Finally, we updated the package lists and installed missing dependencies with the following commands.

apt-get update
apt-get -f install 

4. After that “Plesk Server Health Monitor” installation went fine.

[Do you have problems with Plesk Server Health Monitor? We can make it working for you.]



In short, it is generally a good idea to install “Plesk Server Health Monitor” to identify the server resource usage and the performance of the server. Today, we saw how our Support Engineers installed “Plesk Server Health Monitor” and solved the related issues.

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