…+Num_disks), sometimes less sometimes more. With optimal concurrency you get optimal throughput, which is number of transactions per second. … caching or lower timeout is other story Handling Keep Alive – Keep alive connection in Apache keeps child busy and especially if you have KeepAliveTimeout …

… often do not need keep alive for dynamic pages (there are also exceptions) but you really should have Keep Alive enabled while serving images… pretty interesting. Many learned apache is not good for serving static content especially with many thousands of keep-alive connections. Lighttpd is often… in practice however. First browsers may not resize image with optimal quality and it may just look ugly compared to properly…

… are many hundreds of apache children processes are running. Most of them will be just holding keep-alive while still keeping MySQL connection open…. In optimal configuration with Apache talking to local MySQL installation hand having no remote network accesses would be 20-30 apache children. But…