memory

问题 I have a UIImageView that was created programmatically ( [[UIImageView alloc] init] ). The app's memory stays in check until the setImage: method is called. Any thoughts? 回答1: I'm assuming you're setting your image to your image view using something like this: [imgV setImage:[UIImage imageNamed:@"yourImg.png"]] The problem with using that is that the app caches these images. If you'd like to avoid caching images, use imageWithContentsOfFile: : [imgV setImage:[UIImage imageWithContentsOfFile:[

问题 There's a memory leak in my script and I couldn't find it after 2 days. I found the loop that is causing the memory leak; each iteration of the loop increases the memory usage. I moved the loop into a function to isolate the variables. At the end of the function, I unsetted every variable created by the function so that get_defined_vars() returns an empty array. Here's what I mean: function the_loop(){ $var="value"; ... // processing, including using a library unset($var); print_r(get_defined

问题 I have installed memsql 5.1.2 in following manner with following resources. Google cloud server HDD: 100GB Machine type: n1-standard-4 (4 vCPUs, 15 GB memory) Implementation: 2 MEMSQL NODES running on same machine on the following ports 3306 Master Aggregator 3307 Leaf Resource Utilization: Memory 14.16 GB / 14.69 GB Paging 0 B/s Database size - 10MB 1818 memsql 1.1% 77% /var/lib/memsql/leaf-3307/memsqld --defaults-file=/var/lib/memsql/leaf-3307/memsql.cnf --pid-file=/var/lib/memsql/leaf-3307

问题 I am new to assembly language, and I have a project that I am struggling with. I don't want code; I just want to make sure I am thinking about the problem correctly so I don't drive myself crazy implementing a bad or down-right incorrect approach. The problem can be summarized as such: We have an array of strings in memory as such: .data animals: .asciiz "bear", "tiger", "gorilla", "horse", "dog" We want to take a user's input string and store it into str: .data animals: .asciiz "bear",

问题 I wrote a kernel that computes euclidean distances between a given D-dimensional vector q (stored in constant memory) and an array pts of N vectors (also D-dimensional). The array layout in memory is such that the first N elements are the first coordinates of all N vectors, then a sequence of N second coordinates and so on. Here is the kernel: __constant__ float q[20]; __global__ void compute_dists(float *pt, float *dst, int n, int d) { for (int i = blockIdx.x * blockDim.x + threadIdx.x; i <

问题 I use new to allocate a buffer, as follows: BYTE *p; p = new BYTE[20]; ... delete p; After p is deleted, if I do NOT assign NULL to p , is there a way to determine whether it has already been freed? 回答1: You cannot determine that, and that's one of the main reasons you usually rely on higher-level mechanisms to handle memory, such as smart pointers (shared_ptr, unique_ptr and so on), or in your case rather std::vector , to deal with raw memory in a way that guarantee no double delete ,

问题 This question already has answers here : How can I find out the total physical memory (RAM) of my linux box suitable to be parsed by a shell script? (11 answers) Closed 5 years ago . I want to know to how to calculate total RAM, how we can reach at RAM size by summing up the output of "cat proc/meminfo" command Memtotal = MemFree+?........... any one can help 回答1: You need a tool that takes shared memory into account to do this. For example, smem: # smem -t PID User Command Swap USS PSS RSS .

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Integer wrapper objects share the same instances only within the value 127? public class test { public static void main(String args[]) { Integer a1=127; Integer a2=127; System.out.println(a1==a2); //output: true Integer b1=128; Integer b2=128; System.out.println(b1==b2); //output: false Long c1=127L; Long c2=127L; System.out.println(c1==c2); // output: true Long d1=128L; Long d2=128L; System.out.println(d1==d2);

问题 I am using the default GC with 1.6.0_27-b07 (Sun's JRE) and because of this I am not able to detect an increase in memory with Runtime.getRuntime().freeMemory(). Can anyone shed a light on how to accomplish this? Do I have to use a different GC? Which one? The simple program below prints 0 for the memory allocated. :( :( :( import java.util.HashSet; import java.util.Set; public class MemoryUtils { private static Set<String> set = new HashSet<String>(); public static void main(String[] args) {

问题 Having the following code: String s="JAVA"; for(i=0; i<=100; i++) s=s+"JVM"; How many Strings are created? My guess is that 103 Strings are created: 1: the String "JAVA" in the String pool 1: the String "JVM" also in the String pool 101: the new String s is created every time in the loop because the String is an Immutable class 回答1: String concatenation is implemented through the StringBuilder (or StringBuffer ) class and its append method. String conversions are implemented through the