How to find available memory in iPhone programmatically?

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I'd like to know how to find programmatically available memory in iPhone from Objective-C?

You can use the Mach call host_info(host, flavor, host_info, host_info_count). If you call it with flavor=HOST_BASIC_INFO, the buffer host_info points to is filled with a struct host_basic_info, what looks like that:

struct host_basic_info {
    integer_t               max_cpus;               /* max number of CPUs possible */
    integer_t               avail_cpus;             /* number of CPUs now available */
    natural_t               memory_size;            /* size of memory in bytes, capped at 2 GB */
    cpu_type_t              cpu_type;               /* cpu type */
    cpu_subtype_t           cpu_subtype;            /* cpu subtype */
    cpu_threadtype_t        cpu_threadtype;         /* cpu threadtype */
    integer_t               physical_cpu;           /* number of physical CPUs now available */
    integer_t               physical_cpu_max;       /* max number of physical CPUs possible */
    integer_t               logical_cpu;            /* number of logical cpu now available */
    integer_t               logical_cpu_max;        /* max number of physical CPUs possible */
    uint64_t                max_mem;                /* actual size of physical memory */

From this structure, you can get the memory size.

how to get iOS app specific heap memory usage , -memory-usage-live-dirty-bytes-in-ios-app-programmatically-not-resident I need to get the heap memory that matches with the Xcode instrument value. To make more storage available, your device can remove some of your items, like streamed music and videos, files in iCloud Drive, and parts of apps that aren't needed. It also removes temporary files and clears the cache on your device. But your device only removes items that can be downloaded again or that aren't needed anymore.

You can get physical memory with the following:

NSLog(@"physical memory: %d", [NSProcessInfo processInfo].physicalMemory);

Available memory is going to be not something you can nail down to a hard number, since the os will kill off background apps for you as needed to give the foreground app more memory, along with clearing file caches etc. Assuming you're doing this to optimize your own caching, you could build your cache size based on physical memory and guess how much you should use. For instance, on an old 128m iphone 3g, your entire app would only get maybe 10-15megs of ram before it got killed, where a brand new 1024meg iphone5 is going to allow you hundreds of megabytes of ram before the os decides to kill you.

See memory in devices at

Checking Volume Storage Capacity, However, if you're downloading data in a more predictive manner (for example, downloading a newly available episode of a TV series that the user has been� Vous pouvez obtenir de la mémoire physique avec le code suivant: NSLog(@"physical memory: %d", [NSProcessInfo processInfo].physicalMemory); la mémoire disponible ne va pas être quelque chose que vous pouvez pointer vers le bas à un nombre dur, puisque le système d'exploitation va tuer les applications d'arrière-plan pour vous comme nécessaire pour donner à l'application de premier plan

Swift 5

Your Ram Size in Bytes:

let totalRam = ProcessInfo.processInfo.physicalMemory

Swift 3 iOS Memory Usage for Monit…, to get. MACH_TASK_BASIC_INFO in Swift 3. func mach_task_self() -> task_t { return But when I used the above code to chek the memory programmatically,� You can get memory info programmatically and decide whether to do memory intensive work. Get VM Heap Size by calling: Runtime. getRuntime (). totalMemory ();. Get Allocated VM Memory by calling:

size(ofValue:), Returns the contiguous memory footprint of the given instance. let x: Int = 100 // Finding the size of a value's type let s = MemoryLayout.size(ofValue: x) // s == 8� On your Mac, you can find your Memories in the Photos sidebar. Tap or double-click a Memory to open it. You'll see a summary of the Memory's contents, chosen from the very best photos and videos in your library. You can choose Show More or Show All to see every photo and video in the Memory.

Accessing Cached Data, The URL Loading System caches responses both in memory and on disk, caching behavior, as described in Manage Caching Programmatically. To look for the cached response to a given request, call cachedResponse(for:) on the cache. Discover � macOS � iOS � watchOS � tvOS � Safari and Web � Games � Business� In addition to @JesperFyhrKnudsen's answer and @MathiasLykkegaardLorenzen's comment, you'd better dispose the returned Process after using it.. So, In order to dispose the Process, you could wrap it in a using scope or calling Dispose on the returned process (proc variable).

iOS — Advanced Memory Debugging to the Masses, In “How To Reduce Your App's Memory Footprint”, I explained how to lower your app's memory. Sign up and get an extra one for free. I find this counters confusing. Example: "# Total reserved Bytes" : "Displays the amount of virtual memory. in bytes, currently reserved by the garbage collector." Then I wonder? Is this about the process memory or about the memory that will be collected soon? – Jader Dias Feb 26 '10 at 14:06

  • Available to your app, total physical memory, or filesystem storage memory?
  • I guess it should be this , NSLog(@"Physical Memory :%llu",[NSProcessInfo processInfo].physicalMemory);