memory-consumption

问题 I'm looking for ways to reduce memory consumption by SQLite3 in my application. At each execution it creates table with the following schema: (main TEXT NOT NULL PRIMARY KEY UNIQUE,count INTEGER DEFAULT 0) After that, the database is filled with 50k operations per second. Write only. When an item already exists, it updates "count" using an update query (I think this is called UPSERT). These are my queries: INSERT OR IGNORE INTO table (main) VALUES (@SEQ); UPDATE tables SET count=count+1 WHERE

问题 I'm looking for ways to reduce memory consumption by SQLite3 in my application. At each execution it creates table with the following schema: (main TEXT NOT NULL PRIMARY KEY UNIQUE,count INTEGER DEFAULT 0) After that, the database is filled with 50k operations per second. Write only. When an item already exists, it updates "count" using an update query (I think this is called UPSERT). These are my queries: INSERT OR IGNORE INTO table (main) VALUES (@SEQ); UPDATE tables SET count=count+1 WHERE

问题 Is there a way to know how much memory is consumed by each Eclipse plugin separately? 回答1: Take a heap dump and analyse it with e.g. the Eclipse Memory Analyser. For more information, see Analyzing Equinox Bundle Dependencies with Memory Analyzer 回答2: I would be quite surprised if this were possible, because you would have to have an unambiguous way of determining which plugin "owned" a particular object on the heap. 回答3: Eclipse 3.1 has a built-in Memory Monitor (aka Heap Status) Plugin,

问题 Is there a way to know how much memory is consumed by each Eclipse plugin separately? 回答1: Take a heap dump and analyse it with e.g. the Eclipse Memory Analyser. For more information, see Analyzing Equinox Bundle Dependencies with Memory Analyzer 回答2: I would be quite surprised if this were possible, because you would have to have an unambiguous way of determining which plugin "owned" a particular object on the heap. 回答3: Eclipse 3.1 has a built-in Memory Monitor (aka Heap Status) Plugin,

问题 In book Algorithms fourth edition by Robert Sedgewick on page 200, it says "for example, if you have 1GB of memory on your computer (1 billion bytes), you cannot fit more than about 32 million int values." I got confused after my calculation: 1,000,000,000 bytes/4 bytes = 250 million How the author got 32 million? The book describes like below: 回答1: The author has acknowledged that this is an error in this book website, please refer to the link as follows: http://algs4.cs.princeton.edu/errata

问题 I have this simple Java Code which creates a single JFrame instance and displays it. This link contains the screenshot of memory consumption graph taken by jconsole What worries me is that java.exe in task manager shows memory usage continuously increasing at the rate of 4-5 kbs every 8-9 seconds. Need help import javax.swing.*; class MyGUI extends JFrame { public void makeGUI() { setLayout(null); setSize(500, 200); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); } } public

问题 I'm currently using VisualVM , but the problem I'm having is that I can't save the graphs it generates. I need to report some data about its memory usage and running time, though running time is easy to get with System.nanoTime() . I've also tried the NetBeans profiler but it isn't what I want, since I'm not looking for specific parts that would be slowing it down or anything, so that would be overkill. The biggest problem with it is that it eats up too much processing time. Also doesn't let

问题 I have a iPad (magazine) web application which displays a set of medium sized (~500kb) images. They're displayed one per view (1024x768), and when swiped another one is displayed. I have three images (previous, current and next) as display:block at the same time while other images are hidden with display:none. Everything works fine on some extent. However, when application has run for some time and larger set (20+) of images has been displayed, the application crashes, mostly on iPad 1. My

问题 I've recently become quite fond of Upstart. Previously I've been using God, Monit and Bluepill but I don't really like these solutions so I'm giving Upstart a try. I've been using the Foreman gem to generate some basic Upstart configuration files for my processes in /etc/init . However, these generated files only handle the respawning of a crashed process. I was wondering whether it's possible to tell Upstart to restart a process that's consuming for example > 150mb of memory, as you would

问题 I have written a super-simple TCP/IP socket server in Node.js: 'use strict'; var net = require('net'); net.createServer(function (socket) { socket.resume(); socket.once('end', function () { socket.removeAllListeners(); }); }).listen(3000); The once('end', ... should not even be necessary, but I wanted to be sure. Then I run the following command from the terminal to send 500 MBytes of data to the server: $ cat 500mb.txt | nc localhost 3000 Now it gets interesting. I am watching the node