Availability
Availability Availability of a site shows if a site is accessible from the Internet.

Availability of a site shows if a site is accessible from the Internet. This term is also about access to a server, database or another entity. As all objects in the Internet are based on comlicated infrastructure, nothing can be available always. The question is how to measure it, what is normal and if we may affect it anyway. The measurement of availability is connected to terms Uptime and Downtime, which show for how long a site is unavailable. However, these values can not create the full view of the situation. There could be many reasons of unavailability - server or connection problems, application error, overload of the site and so on. To avoid or shorter the failures, it is needed to supervise the site and analyze the errors, if they happen. For these purposes there are special monitoring tools, which help to increase to availability of the site, collect statistics and provide necessary information about the errors for fast repair. These tools are called Website Monitoring services.

  • CM.Glossary.WebsiteMonitoring
  • CM.Glossary.Downtime
  • CM.Glossary.Uptime
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Uptime and website monitoring

Website monitoring is a process of supervision over the performance of the site. HostTracker is a powerful tool which serves that purpose.

Website monitoring is a process of supervision over the performance of the site. Usually it is used to keep an eye on commercial sites or other pages for which high availability is very important.

Companies, which provide website monitoring services, let their clients to check a website, a server, port or other available from the Internet entity. The responses are collected and analyzed. Usually, the monitoring is performed from different locations, distributed over the whole world or the specific continent or country. Such monitoring is called distributed monitoringand helps to detect network-related issues as well as site or server-related. Also, distributed monitoring often makes possible to analyze the site performance from the places which are close to the real customers, instead of some distant locations which could have high latencies. The collected information could be found in a different form: email reports, graphs and different smart dependencies, to help the client to get a comprehensive view of the site's performance. Parameters like load time, speed and others can help to optimize the site performance. In case of critical error, monitoring services use variety of notification methods to deliver the alert to the client: SMS, voice call, instant messengers, email and others. This, together with immediate diagnostics, helps responsible persons like server administrators or developers to fix the site as soon as possible and minimize the duration of the failure.

Why is this important? For commercial sites, working time is proportional to their income. Roughly speaking, 2 hours of failure per day means that 1/12 part of the potential clients are lost. Even more - loyal customers also can find a more reliable competitor in case they can not receive their services/goods when they want. For other types of sites, like government, educational, NGO this is very important too. If people can't find the information fast, they'll find another source. Some parameters like site speed are important for search engines, others - database connectivity, for example - can greatly affect the convenience of usage of the site. Monitoring of some internal values like CPU load, memory consumption and disk space are important for administrators in order to prevent performance degradation. Another important purpose is verification of SLA (service-level agreement) of hosting provider. For technical issues, no site can be available 100% of time during long enough period. Sometimes servers are rebooted, updated or upgraded. So each hosting provider guarantee some specific value, which is called uptime, that shows how long can a site be down for technical reasons. Uptime is usually measured in percent. In this table it is shown for how long a site could be down for each uptime value:

  • 90%          876 hours
  • 95%          438 hours
  • 99%          87,5 hours
  • 99.9%       8 hours 45 minutes
  • 99.99%     52,5 minutes
  • 99.999%   5 minutes 15 seconds

If the real site performance does not correspond to SLA, it could be a reason for claim and refund request. Also, it can help the customers to select the best hosting for their needs.

Monitoring companies often provide some additional services, like vulnerability check, virus scanning, domain and certificate expiration check and many others, in order to make a useful product for their customers.

Different ways to monitor

The monitoring, based on the purpose, can be performed in several ways. Internal monitoring tools require some software to be installed into the monitored system, for example, corporate network. It helps to detect network issues, system performance and exclude or catch hardware and performance issues. External monitoring is performed from outside. It's purpose is check the availability and performance of the system by the third-party's eyes. Real user monitoring is external monitoring which simulates the real visitor of a site. Depending on complexity, such monitoring can analyze the page loading, content, sometimes - even design problems. Most advanced monitoring can offer its client to create a scenario for a visitor. This is called transaction monitoring and can perform some steps one-by-one: like load the page, navigate through menu, make a purchase. Passive monitoring is performed by a code which is integrated into the website code and sends specific information to the collector server each time the page is loaded. It helps to analyze customers actions on the site and analyze the traffic.

Monitoring services usually support different check protocols, and can monitor not only the websites, but also other entities like a file servers, mail servers, specific ports etc. Depending on task, monitoring interval can vary from several seconds to once per day.

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Home > Testimonials
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Although i'm using the free offering, but it has given me the liberty of alerting system for my landscape

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- Adam
"

Very usefull service, helps us to monitor activity of our sites.

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- A.
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Keep up the good work!

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- biz
"Thank you so much for your service. We were suspecting problems with our hosting company but they denied any problems saying the issues must be at our end. We know we do have issues at our end but still suspected that wasn't the entire story. Your service was able to prove that they are indeed going down regularly - on average twice a week during the trial period. Thanks again for providing the information we needed to make a proper decision on this issue."
- B.
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Your website is very helpful for me..thank you.

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- bsantoso
"Your sites is very nice and is the best service for web designers. thanks a lot."
- Del.
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HostTracker is reliable and very useful to me and my team.

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- D.
"I have been using your service to monitor my site and it's a very good tool."
- Fatima
"Your monitoring service is the best to know exactly what is going on in our website. Thank you very much for your time and very good service."
- F.
"

I was informed when my site was down in a timely manner. Saved me lots of downtime and loosing traffic.

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- Fey.
"To have a record of up-time of a Web site seems a very important concept. So what you offer seems interesting."
- Gerardo
"

Seems like a great service when you are having problems with your host.

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- jay
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This service helps me track when my website goes offline on all service platforms which are accessible (SMS, Emails and Skype) making me be aware of any issues as they occur and act instantly to make sure the customer remains happy.

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- J.
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I like to know when my services are down, and how much time does it take to recover.

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- LP
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This was very helpful for us in identifying just how dysfunctional our host was, so we changed it! 

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- M.O.
"

I happy, that use you services.

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- MG
"Independent verification of website availability is valuable. Let's us support our customers better."
- M.
"

I use it for free an just for having mail of when my website is down, and it's work very well, so I want to thank you.

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- RA
"Great service. Improving constantly."
- Ray
"

The global monitoring system is quite useful -
as most of my outages are really regional outages out of my control. It helps to know this.

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- Rick
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We use the service to be always aware of the case when on our website. A message on the mobile allows us to directly act at the right time to reduce costs. Very good service for any business.

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- Spyros
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Service is very  reliable and performs as described in sales information.  User interface is simple and easy to use.

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- St
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I rely on HostTracker to monitor my servers so I can sleep at night

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- S.
"

Very useful for my company's website verification whether it's up or down and be notified immediately about it, even if using a free account!

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- T.
"Really amazing Service, congratulations."
- W.
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