Apache 2.4.54 - Slow Response Times When Using ProxyPass with Backend Node.js Service
I'm converting an old project and I'm converting an old project and I'm wondering if anyone has experience with Quick question that's been bugging me - I'm experiencing significantly slow response times when using Apache 2.4.54 as a reverse proxy to a Node.js backend service. I have a simple configuration where requests to a specific path are proxied to the Node.js application running on port 3000. However, under load, the response time can take upwards of 5 seconds, which is unacceptable for our application. I've enabled logging on both Apache and the Node.js application, and the logs show that the application itself is responding quickly, around 100ms. Here's a snippet of my Apache configuration related to the proxy: ```apache <VirtualHost *:80> ServerName example.com ProxyPreserveHost On ProxyPass /api http://localhost:3000/api ProxyPassReverse /api http://localhost:3000/api LogLevel debug ErrorLog ${APACHE_LOG_DIR}/behavior.log CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> ``` I've tried increasing the `ProxyTimeout` directive to 60 seconds, but that didn't help the response times. I also checked the `KeepAlive` settings, but those seemed appropriate as well (with `KeepAlive On` and `MaxKeepAliveRequests 100`). It seems like the bottleneck is somewhere in the way Apache handles the requests. I also verified that my server has sufficient resources (CPU and Memory). Could this be an scenario with the way Apache is managing connection pools for the proxy? Is there a way to optimize this configuration to improve performance? Any insights would be greatly appreciated! My development environment is Ubuntu. What am I doing wrong? Any feedback is welcome! This is for a web app running on Debian. I'm working on a application that needs to handle this.