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How to optimize the performance of Linux system, in view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Before we talk about tuning, let's talk about what system performance is. This definition is critical, and if we don't know what system performance is, we won't be able to locate it. I have seen many friends who think this is very easy, but ask carefully, in fact, they do not have a more systematic method, so here I would like to tell you how to systematically locate the performance. Overall, system performance is two things:

1:Throughput: throughput. That is, the number of requests and tasks that can be processed per second.

2:Latency: system delay. That is, the delay of the system in processing a request or a task.

Generally speaking, the performance of a system is constrained by these two conditions, which is indispensable. For example, my system can withstand 1 million concurrency, but the system latency is more than 2 minutes, then this 1 million load is meaningless. The system latency is short, but the throughput is low, which is also meaningless. Therefore, the performance test of a good system must be affected by these two conditions at the same time. Experienced friends must know some of the relationship between these two things: the bigger the Throughput, the worse the Latency. Because the number of requests is too large and the system is too busy, the response speed will naturally be low. The better the Latency, the higher the Throughput that can be supported. Because Latency is short, it means processing is fast, so you can process more requests. At this time, some people will feel that their disk read and write speed is very slow, and they do not know whether it is the poor performance of storage or the problem of the operating system.

An application consumes a lot of resources, but it doesn't know how to start with these problems and doesn't know what to do.

Performance tuning is one of the most valuable courses, resulting in more than 10 times or more performance improvements as a result of one of your parameter adjustments. The content of the course was so powerful that teacher Zou Shenzou declassified the performance tuning course for the first time in ten years.

System tuning idea

System tuning method

Use of system monitoring tools (iostat vmstat sar top, etc.)

Memory tuning case sharing

(1) case study of memory cache performance improvement

(2) the case of memory dirty page tuning

(3) large page mechanism

(4) case analysis and solution of excessive use of database memory

Storage performance tuning case

This is the answer to the question on how to tune the performance of the Linux system. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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