bottleneck: it is a point whr the server may get failure.

Bottleneck is the process of identifying which element is 
slowing down the response time
OR
It is a stage in a process that causes the entire process 
to slow down or stop

Bottleneck is a slowdown of a process and not a stopage.

Bottleneck is a peak point where server will get 
upgradations and degradations
or

Bottleneck is a peak point where server will not respond to 
our process.

Bottleneck is the process to identify which element is 
slowing down (or)Degrading the response time


We can find out the bottlenecks using graphs. Throughput 
and avgresponsetime graphs

It measures the peak usage of the server

A bottleneck, in a communications context, is a point in 
the enterprise where the flow of data is impaired or 
stopped entirely. Effectively, there isn't enough data 
handling capacity to handle the current volume of traffic. 
A bottleneck can occur in the user network or storage 
fabric or within servers where there is excessive 
contention for internal server resources, such as CPU 
processing power, memory, or I/O (input/output). As a 
result, data flow slows down to the speed of the slowest 
point in the data path. This slow down affects application 
performance, especially for databases and other heavy 
transactional applications, and can even cause some 
applications to crash.

a) A narrow or obstructed section, as of a highway or a 
pipeline.
b) A point or an area of traffic congestion. In the 
transportation realm, a bottleneck is typically thought of 
as a physical restriction on capacity. 
         
         A bottleneck is a specific location on a freeway 
that seperates downstream freely flowing traffic from 
queued upstream congestion.