A good web site monitoring service can do much more than simply send an alert when a status egov.uscis.gov. The most effective services will break up the response duration of a web request into important categories that will allow the system administrator or web master to optimize the server or application to provide the best possible overall response time.
Listed below are 5 important components of response here we are at an HTTP request:
1.DNS Lookup Time: The time it takes to find the authoritative name server for the domain as well as for that server to solve the hostname provided and return the correct IP address. If this type of time is just too long the DNS server should be optimized in order to provide a faster response.
2.Connect Time: This is the time required for the internet server to answer an incoming (TCP) socket connection and order and to respond by establishing the connection. If this sounds like slow it often indicates the operating system is trying to reply to more requests laptop or computer can handle.
3.SSL Handshake: For pages secured by SSL, this is the time required for either side to negotiate the handshake process and hang up up the secure connection.
4.Time to First Byte (TTFB): It is now time it takes for the web server to react with the first byte of content after the request is shipped. Slow times here almost always mean the net application is inefficient. Possible reasons include inadequate server resources, slow database queries along with other inefficiencies related to application development.
5.Time for you to Last Byte (TTLB): The time has come needed to return all of the content, after the request has been processed. If this sounds like taking too long it usually indicates that the Internet connection is simply too slow or possibly overloaded. Increasing bandwidth or acquiring dedicated bandwidth should resolve this problem.
It is extremely hard to diagnose slow HTTP response times without this information. Without the important response data, administrators remain to guess about in which the problem lies. Lots of time and money may be wasted wanting to improve different pieces of the web application with the aspiration that something works. It's possible to completely overhaul an internet server and application only to discover the whole problem was really slow DNS responses; an issue which exists on the 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 to identify and correct performance problems efficiently.