What does QPS mean?

QPS (Queries-per-second) is the query rate per second, which is a measure of the traffic processed by a specific query server within a specified time; on the Internet, the machine that serves as a domain name system server Performance is often measured as query rate per second.

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QPS

QPS, the query rate per second, is a measure of how much traffic a specific query server handles within a specified period of time.

Query rate per second

On the Internet, the query rate per second is often used to measure the performance of the domain name system server machine, which is QPS.

Corresponds to fetches/sec, which is the number of response requests per second, which is the maximum throughput capacity.

Calculation relationship:

• QPS = Concurrency / Average response time

• Concurrency = QPS * Average response time

Principle: 80% of daily visits are concentrated in 20% of the time, and this 20% of time is called the peak time.

Formula: (Total PV * 80%) / (Seconds per day * 20%) = Requests per second (QPS) at peak time.

Machine: Peak time QPS per second / QPS of a single machine = required machine.

Case analysis:

With 300w PV per day on a single machine, how many QPS does this machine require?

(3000000 * 0.8) / (86400 * 0.2) = 139 (QPS).

Generally it needs to reach 139QPS because it is the peak value.

Q: If the QPS of a machine is 58, how many machines are needed to support it?

Answer: 139 / 58 = 3

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