How to use PHP to solve the problem of large traffic and high concurrency of the website

This article mainly introduces how to use PHP to solve the problem of large website traffic and high concurrency. It has a certain reference value. Now I share it with you. Friends in need can refer to it

Ordinary P4 The server can generally support up to 100,000 independent IPs per day. If the number of visits is greater than this, you must first configure a higher-performance dedicated server to solve the problem.

First, confirm whether the server hardware is sufficient to support the current of traffic.
Ordinary P4 servers can generally support up to 100,000 independent IPs per day. If the number of visits is greater than this,
then you must first configure a higher-performance dedicated server to solve the problem
, otherwise how can No optimization can completely solve the performance problem.
Secondly, optimize database access.
It is of course best to implement complete staticization of the front desk, which does not require access to the database at all. However, for websites that are frequently updated,
staticization often cannot satisfy certain functions.
Caching technology is another solution, which is to store dynamic data in cache files. Dynamic web pages directly call
these files without having to access the database. Both WordPress and Z-Blog use this caching technology extensively. I
myself also wrote a Z-Blog counter plug-in, which is also based on this principle.
If it is indeed impossible to avoid access to the database, then you can try to optimize the query SQL of the database. Avoid using statements like
Select * from. Each query only returns the results you need to avoid large ## in a short period of time. ## Quantity SQL query.
Third, prohibit external hotlinking.
Hotlinking of pictures or files from external websites often brings a lot of load pressure, so the hotlinking of pictures or files from external websites to
itself should be strictly restricted. Fortunately, hotlinking can be controlled simply through refer. , Apache itself can disable hotlinking through configuration, and IIS also has some third-party ISAPIs that can achieve the same function. Of course, forging referrals can also be done through code to achieve hotlinking. However, currently there are not many people who deliberately forge referrals and hotlinking.
You can ignore it or use non-technical means to solve it, such as on pictures. Add watermark.
Fourth, control the download of large files.
Downloading large files will occupy a lot of traffic, and for non-SCSI hard drives, downloading a large number of files will consume
CPU, which will reduce the website's responsiveness. Therefore, try not to provide downloads of large files exceeding 2M. If
is required, it is recommended to place the large files on another server.
Fifth, use different hosts to divert the main traffic
Place files on different hosts and provide different images for users to download. For example, if you feel that RSS files take up a lot of
traffic, then use services such as FeedBurner or FeedSky to place the RSS output on other hosts. In this way, most of the traffic pressure of other people's access will be concentrated on FeedBurner's host, and RSS will not be available. It takes up too many resources.
Sixth, use traffic analysis and statistics software.
Install a traffic analysis and statistics software on the website, and you can instantly know which places consume a lot of traffic and which pages
need to be optimized. Therefore, accurate statistical analysis is required to solve the traffic problem. The traffic analysis and statistics software I recommend
is Google Analytics. I feel that its
effect is very good during use. Later I will introduce in detail some common sense and skills of using Google Analytics.



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