A good web site monitoring service will do much more than simply send an alert when a egov.uscis down. The most effective services will breakdown the response period of a web request into important categories that will permit the system administrator or webmaster to optimize the server or application to supply the best possible overall response time.
Listed here are 5 important components of response time for an HTTP request:
1.DNS Lookup Time: The time it takes to find the authoritative name server for your domain as well as for that server to solve the hostname provided and return the right IP address. If the time is just too long the DNS server must be optimized so that you can provide a faster response.
2.Connect Time: It is now time required for the net server to respond to an incoming (TCP) socket connection and order and to respond by establishing the connection. If this is slow it always indicates the operating system is trying to answer more requests than it can handle.
3.SSL Handshake: For pages secured by SSL, the time has come required for each side to negotiate the handshake process and hang up up the secure connection.
4.Time for you to First Byte (TTFB): The time has come it takes for that web server to react with the first byte of content following the request is shipped. Slow times here almost always mean the internet application is inefficient. Possible reasons include inadequate server resources, slow database queries and other inefficiencies associated with application development.
5.Time and energy to Last Byte (TTLB): It is now time needed to return every one of the content, after the request continues to be processed. If this describes taking too long it usually suggests that the Internet connection is just too slow or is overloaded. Increasing bandwidth or acquiring dedicated bandwidth should resolve this issue.
It is extremely challenging to diagnose slow HTTP response times without this information. Without the important response data, administrators remain to guess about the location where the problem lies. A lot of time and money can be wasted attempting to improve different pieces of the web application with the aspiration that something will work. It's possible to completely overhaul an internet server and application only to find the whole problem was actually slow DNS responses; a challenge which exists on a different server altogether.
Use a website monitoring service that does a lot more than provide simple outage alerts. The very best services will break the response time into meaningful parts that will allow the administrator in order to identify and correct performance problems efficiently.