EventĮvent builds on Worker to solve the issue of thread locks for a keep-alive request. Monitoring the number of concurrent connections to the server will enable you to understand how Worker is handling keep-alive threads as well as the server throughput. This, in turn, affects the number of concurrent requests the server can handle. Worker, however, locks a thread for the keep-alive duration before releasing it for other requests. But with Worker, each child process is multithreaded and can service multiple requests. Worker functions in a similar way to Prefork there’s one master that takes care of a bunch of child processes. Monitoring this is important for determining whether additional child processes need to be added. Because this is a single-threaded process, a Prefork-enabled Apache server can serve fewer concurrent connections. Each child process is responsible for servicing only one request. It runs Apache as a single master instance, making Apache responsible for all child processes created. Prefork creates copies of itself before requests come into the server, hence the name. But while it’s been around for a long time, it’s not one of the best-performing options. Prefork is a very well-known MPM for Apache. There are three popular MPMs commonly used in most Apache web servers: Prefork, Worker, and Event. MPMs are accustomed to handling multiple requests in parallel by using a threaded approach and running on multiple CPU cores. Knowing which Multi-Processing Module (MPM) your Apache installation is using will make it easier to identify which parameters you need to monitor. The Three Most Popular MPMs Used in Apache In this blog post, we’ll go through the key Apache server metrics you should track and the best performance monitoring tools to help you set up an efficient monitoring and alerting strategy. ![]() Regularly monitoring the performance can help you avoid these issues. It’s a well-known fact that with high traffic, the performance of Apache web servers can take a hit, experiencing bottlenecks as your traffic scales up, which will lead to delayed responses. Because you can easily customize it through modules, it has become the go-to choice of both individuals powering their personal blogs and enterprises running high-traffic websites and web apps. The Apache HTTP Server (httpd) is a widely used, open-source web server application. SolarWinds Server and Application Monitor How to Monitor Apache Web Server Performance: Key Metrics to Measure. ![]() The Three Most Popular MPMs Used in Apache.
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