Nginx browser local cache settings

The thing is actually like this. At that time, my leader gave me a perf hardware performance monitoring task. During the process of using perf, I entered the command perf list and I saw the following information: My task is to enable these cache events to be counted normally. But the point is, I have no idea what these misses and loads mean.

Using the cache can increase the speed of the computer because the cache shortens the waiting time of the CPU. Cache is a small but high-speed memory located between the CPU and the main memory DRAM. The function of Cache is to increase the rate of CPU data input and output; Cache has a small capacity but fast speed, while the memory speed is low but has a large capacity. By optimizing the scheduling algorithm, the performance of the system will be greatly improved.

First, let me briefly introduce the types of location and matching rules, using the example of nginxwiki as an example: location=/{#matchesthequery/only.[configurationa]}location/{#matchesanyquery,sinceallqueriesbeginwith/,butregular#expressionsandanylongerconventionalblockswillbe#matchedfirst.[ configurationb]}location^~/im

Note: The root and aliasroot instructions in location only set the search root to the directory set by root, that is, the uri will not be truncated. Instead, the original uri will be used to jump to the directory to find the file. The aias instruction will truncate the matching uri, and then Use the path set by alias plus the remaining uri as a sub-path to find the uri of proxy_pass in location. If the url of proxy_pass does not have uri, if the tail is "/", the matching uri will be truncated. If the tail is not "/", then Will not truncate the matching uri if the proxy_pass url contains uri

Characteristics of cache: A one- or two-level high-speed, small-capacity memory set between the CPU and the main memory. The information is naturally lost when the computer is powered off. Characteristics of ROM: it can only read data from the memory, but cannot write information into it. The data will still exist after the computer is powered off. Characteristics of ram: it can read data from the memory and write information to the memory; it is used to store commands, programs and data required to run the program; information is naturally lost when the computer is powered off.

Here is the tutorial for nginx reverse proxy caching: Install nginx: sudoaptupdatesudoaptinstallnginx Configure reverse proxy: Open nginx configuration file: sudonano/etc/nginx/nginx.conf Add the following configuration in the http block to enable caching: http{...proxy_cache_path /var/cache/nginxlevels=1:2keys_zone=my_cache:10mmax_size=10ginactive=60muse_temp_path=off;proxy_cache

Cache is called cache memory. It is a high-speed small-capacity memory between the central processing unit and the main memory. It is generally composed of high-speed SRAM. This kind of local memory is oriented to the CPU. It is introduced to reduce or eliminate the gap between the CPU and the memory. The impact of the speed difference between them on system performance. Cache capacity is small but fast, memory speed is low but capacity is large. By optimizing the scheduling algorithm, the performance of the system will be greatly improved.

Preface Caching can effectively improve system performance and stability by storing frequently accessed data in memory, reducing the pressure on underlying data sources such as databases. I think everyone has used it more or less in their projects, and our project is no exception. However, when I was reviewing the company's code recently, the writing was very stupid and low. The rough writing is as follows: publicUsergetById(Stringid){Useruser=cache. getUser();if(user!=null){returnuser;}//Get user from the database=loadFromDB(id);cahce.put(id,user);returnu