This section covers scalability problems and how to prevent them. This is more of a “don't do this” list, explaining limiting factors that can degrade performance or prevent the server from scaling. We will also investigate the proactive tuning of Apache for optimal performance.
Operating System Limits
Several operating system factors can prevent Apache from scaling. These factors are related to process creation, memory limits, and maximum simultaneous number of open files or connections.
The Unix ulimit command enables you to set several of the limits covered in this section on a per-process basis. Please refer to your operating ...