… you probably know PHP “mysql” extension supported persistent connections but they were disabled in new “mysqli” extension, which is probably one of… to swap aggressively. This is where connection pooling would be extremely helpful but with default Processed based PHP installations it does not… are running. Most of them will be just holding keep-alive while still keeping MySQL connection open, others will serve static…

… one is pretty interesting. Many learned apache is not good for serving static content especially with many thousands of keep-alive connections. Lighttpd is often named as faster alternative. It is… as lighttpd tries to buffer all content it gets from PHP script which means many megabytes for large files. Partial file…

… seconds or use some caching or lower timeout is other story Handling Keep Alive – Keep alive connection in Apache keeps child busy and… them. For dynamic pages you typically do not need keep alive enabled and you’d better to server images from some… with modern PHP applications each apache children may require 64MB of memory, sometimes even more. Part of this memory is kept between…