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This article mainly introduces "introduction to the usage of Memcached under php". In daily operation, I believe many people have doubts about the introduction of the usage of Memcached under php. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "introduction to the usage of Memcached under php"! Next, please follow the editor to study!

When is memcache used and under what circumstances should it not be used?

When should you use memcache and when should you avoid it? Now you know that memcahced is designed to relieve the pressure on the tutorial side of the database, but you'd better develop a good strategy to get memcached to cache the queries that have the most impact on performance as much as possible. You can try to do some execution time logs for all the queries in the application, which can help you analyze what should be cached.

Now suppose you are running an e-commerce website, and you can cache product profiles, shipping information, or other data that requires complex queries in memcached. When a product page is loaded, the above-mentioned data will skip database queries and be obtained directly from the cache. Caching can greatly change the overall performance of your site. You just need to remember when the product is updated in the background. Just update these caches together.

In some cases, caching data is not a good idea. For example, when a data is updated frequently, we need to update the cache at the same time every time the data is updated. The cache hit rate is not high. It will lead to some additional performance sacrifices. In this case, it may be better to check the database directly.

Security of memcached

If you understand the workflow of memcached, you may have noticed that there is no permission control related process in the process of accessing the cache. If your data is not very important, you don't have to worry about this aspect of security. If you need it, the following points can help you use it more fully:

Use a unique key: because the data in memcached exists as a large array, you should use a unique key. The only way to access your data is through the key when you save the data. There is no other way to query it.

Ensure the security of your memcached: because memcached itself does not have an authentication mechanism, all server queries for memcached should be done through the firewall. You can set rules on the firewall, which servers are allowed to be accessed and which are not.

Encrypt your data: you can encrypt your data and key in memcached, which takes some extra cpu time, but for your data security, this method is worth trying if circumstances permit.

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At this point, the study of "introduction to the usage of Memcached under php" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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