monitor

问题 What I'd like I'd like to have an internal web app in PHP where I can look at all my errors, logs, etc., from all my apps and sites. Let me paint a picture to explain: I'd like to go to something like monitor.thecompany.com and I will see that there was an error uploading a file on client1.com and that a new user was registered at client2.com. Internals I imagine that I would call a function in my apps and sites (something like send_to_monitor($type, $title, $description) ), which would send

问题 is there any way to monitor/log a MySQL user and the queries he/she has ran? I had to turn off the general log using the query: SET GLOBAL general_log = 'OFF'; because otherwise the log file was no more processable by text editors. I was looking for a way to turn this log on for some users I want to monitor, but it does not seem to work that way. Is there any other way to know everything a definite user does run on my database? Thanks in advance. 回答1: There are a few ways I can suggest.

问题 My problem is that I don't know how synchronise multiple threads using Ruby. The task is to create six threads and start them immediately. All of them should do some work (for example puts "Thread 1" Hi" ) one after another in the order I need it to work. I've tried to work with Mutex, Monitor and Condition Variable, but all of them worked in random order. Could anybody explain how to achieve my goal? After some time of struggling with Mutex and Condition Variable I've achieved my goal. This

问题 I'm trying to setup forever and NodeJS to monitor&restart my app and also keep it running when exits. Currently I have this: var forever = require("forever-monitor"); var child = new(forever.Monitor)('main.js', { 'silent': false, 'pidFile': '../pids/app.pid', 'sourceDir': '.', 'watch': true, 'watchDirectory': '.', 'watchIgnoreDotFiles': null, 'watchIgnorePatterns': null, 'logFile': '../logs/forever.log', 'outFile': '../logs/forever.out', 'errFile': '../logs/forever.err' }); child.start();

问题 So like in Linux on Intel processor, we have a large amount of hardware performance counters to access. Like previously, using a user-space software called perfmon2, I could get values of cache miss rate, CPU stalling cycles due to some reason(e.g,. L1 cache miss) and etc. My question is , do we have those stuff in Android? Since it's based on ARM, I do not think we have as strong performance monitor counter support as we have in x86, right? 回答1: ARM11 and Cortex-A/R do have hardware

问题 I want to know if there is an efficient solution to monitor a process resource consumption (cpu, memory, network bandwidth) in Linux. I want to write a daemon in C++ that does this monitoring for some given PIDs. From what I know, the classic solution is to periodically read the information from /proc, but this doesn't seem the most efficient way (it involves many system calls). For example to monitor the memory usage every second for 50 processes, I have to open, read and close 50 files

问题 I'd like to create a virtual monitor driver for OS X. What I mean by virtual is a monitor driver that does not drive an attached monitor, yet fools OS X into thinking there is such a monitor attached. The purpose? It can tunnel display data to some other device over some other protocol, say VNC. I believe this has been done before in one form or another (perhaps those apps that turn your iPad into a secondary display). Any coding/kernel hackery pointers on this would be appreciated! 回答1:

问题 I've just been messing around with threads in Java to get my head around them (it seems like the best way to do so) and now understand what's going on with synchronize, wait() and notify(). I'm curious about whether there's a way to wait() on two resources at once. I think the following won't quite do what I'm thinking of ( edit : note that the usual while loops have been left out of this example to focus just on freeing up two resources ): synchronized(token1) { synchronized(token2) { token1

问题 I'm trying to find the horizontal width of a monitor in inches or cm (not pixels!) to make a small "ruler" program. DPI would work too. I'm using PyQt4. 回答1: try using the QDesktopWidget's width() and height() to get the width and height respectively. Class reference at QDesktopWidget Class Reference, this will give you the screens size in pixels and then use QX11Info.appDpiX, this will give you the DPI in pixels per inch. Use both the above info to calculate the screen size in inches. PS:

问题 This question was migrated from Super User because it can be answered on Stack Overflow. Migrated 9 years ago . Ever since I've been using an external monitor with my laptop, when I need to change the backlight brightness I have to press the monitor's buttons to navigate through its menu and adjust the brightness. That is really a pain. It's too many button presses! When I was using my laptop's integrated monitor, that was as simple as presing the Fn key plus a combination. Probably some of