To allocate approximately 10tb of reserved memory. in other words, you may not access reserved pages, and you may not assume that at some point the system will have sufficient physical memory to back them up. Pages are not available for subsequent allocations, but they are not backed by physical memory. Pages is available for subsequent allocations (and excluding unusable pages, discussed later).
on 64-bit windows, each 64-bit process can allocate up to 128tb of virtual memory (this limit used to be 8tb until windows 8.1).Įach page of virtual memory can be in one of three states: free, reserved, and committed: on 32-bit windows with a default configuration, each process can allocate up to 2gb of virtual memory. although it is often the case that there is more virtual memory available than ram to back it up, virtual memory is still limited. any address in your application is a virtual address that is translated by the cpu to a physical address when accessed. Windows applications do not access physical memory directly. we must begin with the virtual memory size of the process - the amount of address space that is in use.
you can also run it from the command line, for example:Īrmed with these tools, let’s get to business and try to characterize the various kinds of memory usage in windows processes. simply choose a process when launching vmmap, and view memory utilization categorized by type (private, shared, reserved, committed) and purpose (image, heap, stack, mapped file). it offers unparalleled insight into what your application is doing in terms of memory. To monitor application memory usage, we will use currently, it supports multiple kinds of allocations: reserve, commit, shareable memory, and more. i’ve written one for this blog post: it is simply called if we can’t even agree on what “working set” or “commit size” means, how can we ever monitor our windows applications successfully?įirst, we will need a sample application that will allocate various kinds of memory for our experiments. but try it: googleĪnd you’ll see confusing, conflicting, inconsistent, unclear explanations of what the different metrics represent.
I never thought it would be hard to find a definitive resource for what the various memory usage counters mean for a windows process. REST Custom Sensor: This sensor monitors the availability of RESTful APIs, recognizes the content of XML an JSON files automatically and creates suitable channels for values.“how much memory is your process using?” - i bet you were asked that question, or asked it yourself, more times than you can remember.Windows Process Sensor: This sensor monitors a Windows process using performance counters or WMI.WMI Custom Sensor: This sensor uses WMI to execute an individual WQL query and monitors the subsequent return value.PerfCounter Custom Sensor: This sensor monitors an individually-compiled set of Windows performance counters.WMI Security Center Sensor: This sensor monitors any product which can be inspected by the Windows Security Center.Event Log (Windows API) Sensor: This sensor uses the Windows Application Programming Interface (API).WMI Event Log Sensor: This sensor reads the Windows Event Log and provides easy-to-read visuals of the data.We also offer a number of useful sensors which you can customize yourself. PRTG comes with predefined sensors for monitoring conventional parameters such as CPU, memory, and the network card.