heap-memory

问题 So... I was generating queries and then I pastes one particularly long one into eclipse, eclipse encountered a heap error and then crashed. I thought, no big deal, I can just go back in and delete a bunch, except for... every time I try to look at the file now eclipse will just crash. Either a heap error or a gc overhead limit error. I plan on just deleting this from outside eclipse, but I really want to know if there are any clever ways of attacking this problem. It's less than 14 megs, and

问题 I'm writing some code that generates a vector of geometric elements: struct Geom_Entity { // a bunch of geometric information, // like tangent planes, force vectors, etc } The code is parsing many of these entities from a text file (for e.g.) so we have a function currently: parse_Geom(x: String) -> Vec<Geom_Entity> { // a bunch of code } These geometric entities are large structs with 17 f64 s and a few other fields. The file may contain well over 1000 of these, but not so many that they can

问题 I'm creating some big JSON file using GSON to create custom JSON from GTFS (Google Transit). The problem is when I'm converting from my object class to JSON: Gson gson = new Gson(); String rutasJSON = gson.toJson(my_object); It gives this exception: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Unknown Source) at java.lang.AbstractStringBuilder.expandCapacity(Unknown Source) at java.lang.AbstractStringBuilder.ensureCapacityInternal(Unknown

问题 I wrote a small program, kind of specialized HTTP server in haskell, which is not much more complex than the code below. What puzzles me is its memory consumption. Say, when I run a test compiled from the enclosed code and make several POST requests containing up to 20Mb body whole program will have VM size of ~800Mb and this sounds odd. And this space is not returned to system if I leave an instance of such program running idle. What does this mean? import System.IO import Network.HTTP

问题 I am trying to execute a pig script with around 30 million data and I am getting the below heap space error: > ERROR 2998: Unhandled internal error. Java heap space > > java.lang.OutOfMemoryError: Java heap space > at java.util.Arrays.copyOf(Arrays.java:2367) > at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:130) > at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:114) > at java.lang.AbstractStringBuilder.append

问题 I've read something about an application having 16MB of memory "reserved" when it's on front. At least, as a developer I should count on this, even though depending on the device it may be more. I'm supporting down to 2.2 froyo, so many devices will not be high-end devices. I get some messages in Logcat saying this: 03-29 14:08:51.570: I/dalvikvm-heap(19899): Grow heap (frag case) to 13.624MB for 200765-byte allocation What worries me is the 13MB. I don't know if my app may crash if it

问题 This question already has answers here : To run dex in process, the Gradle daemon needs a larger heap. It currently has approximately 910 MB (13 answers) Closed 3 years ago . Whenever I try to make the build of the app , gradle takes too much of time and there comes a message showing that you should increase the Gradle size to 3072 MB , currently it is 910 MB . so my question is how can I increase the heap memory of gradle ?? 回答1: Just add android { .... dexOptions { // Prevent OutOfMemory

问题 So i got a program who use Java heap -Xms5g -Xmx12g I have set the initial Java heap size to 5gb and MAX heap size to 12gb But when i look in task manager or resource monitor, My program is only using 400mb. So here are my questions: What does initial Java heap size means? How come if i set initial Java heap size to 5gb, i only see the RAM use on the program to 400mb, should it not be 5gb? As initial heap means minimum size right? 回答1: The -Xmx maximum heap size is the largest size the heap

问题 Is there any tool to help me detect heap corruption in C++? I can't provide source code because it's a big project. I can use any tool that works with Visual Studio or with xcode. The tool should work fine with multithreading. The problem is not very common, it appears after a long time and only in very special cases(they were not detected precisely!). Thank you! EDIT: Thanks you all for your answers! I will test the tools and I will accept one answer after the tests. 回答1: Valgrind is the

问题 Suppose I have the string "abc" and I want to calculate the number of bytes it occupies in memory. I could do: import Data.Bits finiteBitSize ("abc" :: [Char]) but that breaks because [Char] is not a type supported by the function. (Also it is bits not bytes, but the point was to paint a picture of what I'm looking for). My question is: Can we write a function in Haskell to measure the number of bytes that a string of n characters occupies? 回答1: There's a Haskell package called ghc-datasize