![]() ![]() Tweaking these settings can be immensely helpful, and anyone using apache should know how - just please make sure your hardware can handle the software configuration you set up. while an ongoing lack of quality sleep can affect a persons performance at work or school. largest process that can be called uses 178mb, so 200mb, and your current VM on only has 1gb of RAM - I'd set max_children to 2 - then when you upgrade your VM (what're you doing with 1gb in 2021?) and you have 8gb of RAM on your server, you can use max_children = 18 Notice in both examples the rounding is in favor of extra resources, and after doubling for fpm's purpose, leaves behind a chunk of memory for the OS, and other background processes to use. A lack of sleep can harm mental and physical health. If you're doing this for any type of mission critical business web server I'd aim to round up then double all estimates. Note that the default maximum script execution time is 30 seconds, but you can use sleep () and usleep () to make your scripts go on for longer than that because technically PHP does not have control during the sleep operation. Example 1 usleep () example format('H:i:s.v'), ' ' // wait for 2 milliseconds usleep(2000) // back echo (new DateTime('now'))->format('H:i:s.v'), ' ' // wait for 30 milliseconds usleep(30000) // back again echo (new DateTime('now'))->format('H:i:s.If (processing requirements * start_servers > CPU)Īnd always know your hardware before tweaking these settings, especially in dynamic/on demand (imo, easier to make mistakes). Is it a good idea or should I use different delay ways sleep () keeps a connection open, could this be a problem I do: index.php -> stuff.php -> index. If (process memory usage * max_children > RAM) 1 Suppose a website with 'high' traffic, I want to use the php sleep (4) function to avoid flooding. This means that data written to the output buffer will not show up until a certain amount of the buffer has been filled. ![]() As you posted in your own answer (and I'm glad it worked) increasing the number of allowed children can be a good solution - but there's a lot that goes into optimizing php-fpm, and certainly more thought should be given to the entire system before making these configuration changes.īut no matter what you should know when using static values: First problem is that stuff you write to the PHP output buffer is normally not sent to the browser immediately, it is buffered on the server for performance reasons. For other operating systems it is the POSIX function sleep. ![]() Whether you're simulating real-time processing, rate-limiting API requests, or simply pausing script execution, these functions are invaluable tools for PHP developers. The way that sleep works is OS-dependent, because the PHP function sleep calls into the appropriate runtime function to actually do what it says on the tin. Not sure how it got messed up because your screenshot hints that you are using XAMPP. You have a task waiting to be started (5 active, 0 idle, 6 tasks). In this tutorial, we covered the basics of using PHP's sleep() and usleep() functions to introduce time delays in your scripts. If the server decides to throw you the php source code instead of running it, your server setup is messed up. ![]()
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