monitoring

问题 In our production environments, we are using Thread Pool Executor to execute runntable task. I need to develop a Thread pool Heartbeat a monitoring system for Thread pool Executor Service: Every 60 seconds, the requirement is to collect following statistic about the Thread Pooled Executor: 1) size of the thread pool 2) length of queue waiting for a thread (a duration or time task waited in blocking queue before thread executed ) 3) Average wait time in queue during the last heartbeat interval

问题 What I want to do is to monitor a table in mysql which is always auto-updated by a sms gateway. The script should be monitored continuously and as soon as there is a new entry in the table, a php script ritn to perform further operations should be triggered. How do I achieve this? 回答1: I've done exactly this lots of times using cron. So your php script starts by seeing if there is a new entry, and then does what it needs to do if there is. If there's nothing to work on, it just exits

问题 I have a Google Alert, which I set to be delivered as an RSS feed as-it-happens But is polling that RSS feed the only way to get RSS feed or is there a way to get notified from Google alert as the feed is published from Google? (say through a webservice, etc) 回答1: Google Alerts feeds support PubSubHubbub which essentially pushes notifications of updated content to you if you register on the feed's hub. They're using the hub at pubsubhubbub.appspot.com More info on PuSH here: http://code

问题 Here is the problem: "Agents" installed on many different servers send "heartbeat" signals up to a central server every 5 seconds. How can I find the ones that have missed their heartbeat for more than 10 seconds actively and raise an alert? The problem is simple if you don't think about scalablity. In the simplest form, you can record the timestamp of the latest heartbeat received from each agent in a database table and run a regular query to find the ones older than the threshold. This

问题 Here is the problem: "Agents" installed on many different servers send "heartbeat" signals up to a central server every 5 seconds. How can I find the ones that have missed their heartbeat for more than 10 seconds actively and raise an alert? The problem is simple if you don't think about scalablity. In the simplest form, you can record the timestamp of the latest heartbeat received from each agent in a database table and run a regular query to find the ones older than the threshold. This

问题 Is there any tool which would allow for monitoring Hibernate 2nd level cache usage? I know that I could use Hibernate API for retrieving such information. But what should I do when I have application which doesn't read the information itself, and I can't modify it? Is there any way to read cache statistics from the outside of the application? 回答1: Quoting Hibernate documentation: 3.4.6. Hibernate statistics If you enable hibernate.generate_statistics , Hibernate exposes a number of metrics

问题 I am trying to create a little helper application, one scenario is "file duplication finder". What I want to do is this: I start my C# .NET app, it gives me an empty list. Start the normal windows explorer, select a file in some folder The C# app tells me stuff about this file (e.g. duplicates) How can I monitor the currently selected file in the "normal" windows explorer instance. Do I have to start the instance using .NET to have a handle of the process. Do I need a handle, or is there some

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I have a project i am working on currently and would like to implement some sort of software tracking in the code. ideally, stuff like how often its launched. how long it runs for, feature tracking, etc. I already use Exceptioneer for unhandled exceptions, but would like something similar for usage tracking.

问题 The problem that I faced is my application's memory used is only 100MB after that it decreased 50MB, but on Window Task Manager it showed 150MB and always keep or increase but not decrease, How can we reduce Memory (Private working set) on task manager ? 回答1: What you are seeing in JConsole (or other monitoring tools) is the pattern the java memory is being used. The memory of the JVM is usually divided among these areas (what you also see in monitoring tools). Heap memory which is for Java

问题 In my application, I am performing my file reading by another thread(other that GUI thread). There are two buttons that suspend and resume the Thread respectively. private void BtnStopAutoUpd_Click(object sender, EventArgs e) { autoReadThread.Suspend(); } private void BtnStartAutoUpd_Click(object sender, EventArgs e) { autoReadThread.Resume(); } but I am facing this warning, Thread.Suspend has been deprecated. Please use other classes in System.Threading, such as Monitor, Mutex, Event, and