7/30/2023 0 Comments Nodejs memory monitor![]() Depending on the type of monitoring you've set up on your application, this may be trivial or it may be extremely difficult or impossible. Cross reference the major increases in application memory with the areas of your application that are getting the most usage during those times.Tools We Could Useīut how do you isolate a memory leak in Node? Here are a few options: This is obviously bad for your application, and unless you are restarting your processes regularly (as we had to do intentionally for a while to keep the application healthy) you are going to have issues. Memory allocation cannot grow infinitely, and eventually the process will encounter an "out of memory" fault or exception, and it will crash or be terminated. Our application monitoring showed that our main web application process was suffering from this. Wikipedia defines a memory leak as "a type of resource leak that occurs when a computer program incorrectly manages memory allocations in a way that memory which is no longer needed is not released." This usually means that as a process with a memory leak continues to run, the memory that it is using will continue to grow. In this blog post, I'm going to outline the process of tracking down the leak and fixing it. A while back, we noticed that our Node web application servers had a slow memory leak and we wanted to fix it. The causes behind each of the above mentioned symptoms can be very different, so the process of diagnosing and fixing any one of them needs to be tailored to the particular problem you're encountering. If any of these get outside of acceptable limits, your application can slow down or even crash. ![]() With a complex web application, there are a lot of things to monitor to make sure that everything is running smoothly: CPU utilization, memory utilization, disk IO, requests per minute, error rates, database connections, and average query durations, just to name a few.
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