Session Window in simple language according to the scheme?

Question

Apache HTTP Server

I can't understand the Session Window thread activity scheme



. How is this scheme read correctly and where is it applied?

Do I understand correctly that there is a count of those events that have a difference in creation time of 5 minutes?

Answer 1

Judging by the title, all events with the same key, such that the difference between adjacent ones is no more than 5 minutes, are considered one session. In the picture, green records have a spread of 6 minutes, but are considered one session.
Apparently, it is used where there are some network sessions (web site or some other server). Users come in, do something for a random time and leave. You can see some user activity (packets, http requests) in time. And this scheme counts how many times users have connected. Here the assumption is that the user, for example, is doing something on the site at least once every 5 minutes. Well, or in the protocol there are some keep alive packets / requests every 5 minutes.

Answer 2

A new "window" of the session is created/closed separately for each new block of incoming data for recording.
It is used in data storage and synchronization systems, and also to reduce the wear and tear of data carriers through pending write operations (usb in Windows, for example).