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Ash alone, before any request.Ash 0 waiting
Chapter 1 of 7
One server’s ceiling
Larkspur’s shop runs on one server, Ash. At one second in, a sale starts and requests arrive twice as fast.
This chapter: What happens to the wait when requests arrive faster than one server can answer?
About this chapter
You will learn
- A server answers only so many requests a second
- Past that, a queue grows and every wait with it
- Why p99 shows what the slowest customers feel
Words you’ll meet
- Capacity
- The most requests a server can answer per second before a queue forms.
- Queue
- Requests waiting for a free slot on a server.
- p99
- The wait 99 of every 100 requests beat: the slow edge of what customers feel.
- Load balancer
- The switch in front of several servers that picks which one gets each request.
Step 1 of 5
Ash works on 4 requests at once. The board shows every wait; marks the slowest edge.
Run the morning.