Now I’ll talk about how to monitor virtual memory, on Linux (where it’s easy) and, next time, on Solaris (where most people and systems do it incorrectly.) Running programs that require more memory than the system has will mean pages (or processes) are moved to/from disk and memory in order to get enough physical memory to run – and system performance will suck.) (TL DR: swapping is moving an entire process out to disk paging is moving just specific pages out to disk, not an entire process. See Exponential distribution if you are interested in the math behind the function.In a prior blog post, I talked about what virtual memory is, the difference between swapping and paging, and why it matters. The measurementInterval() function computes a random interval in milliseconds such that on average there is one measurement every five minutes. SetTimeout (performMeasurement, interval )

The difference between these two notions leads to memory leaks as illustrated by the following example. If the web page cannot reach an object via its variables and the fields of other reachable objects, then the browser can safely reclaim the object. Therefore browsers approximate the notion of 'an object is needed' with the notion of 'an object is reachable'. The detection is not perfect though, and it was proven that perfect detection is an impossible task. Since memory is a finite resource, the browser performs garbage collection to detect when an object is no longer needed and to free the underlying memory chunk.

Whenever a web page creates an object, the browser allocates a chunk of memory 'under the hood' to store the object.

Report a problem with the implementationīrowsers manage the memory of web pages automatically.

How is asureUserAgentSpecificMemory() different from the legacy mory API?.

Linux monitor memory usage over time