kill | 易学教程

Terminating idle mysql connections

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问题 I see a lot of connections are open and remain idle for a long time, say 5 minutes. Is there any solution to terminate / close it from server without restarting the mysql service? I am maintaining a legacy PHP system and can not close the connections those are established to execute the query. Should I reduce the timeout values in my.cnf file those defaults to 8 hours? # default 28800 seconds interactive_timeout=60 wait_timeout=60 回答1: Manual cleanup: You can KILL the processid. mysql> show

Ensuring subprocesses are dead on exiting Python program

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问题 Is there a way to ensure all created subprocess are dead at exit time of a Python program? By subprocess I mean those created with subprocess.Popen(). If not, should I iterate over all of the issuing kills and then kills -9? anything cleaner? 回答1: You can use atexit for this, and register any clean up tasks to be run when your program exits. atexit.register(func[, *args[, **kargs]]) In your cleanup process, you can also implement your own wait, and kill it when a your desired timeout occurs.

What does 'killed' mean?

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问题 I have a Python script that imports a large CSV file and then counts the number of occurrences of each word in the file, then exports the counts to another CSV file. But what is happening is that once that counting part is finished and the exporting begins it says Killed in the terminial. I don't think this is a memory problem (if it was I assume I would be getting a memory error and not Killed ). Could it be that the process is taking too long? If so, is there a way to extend the time-out

kill process with python

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问题 I need to make a script that gets from the user the following: 1) Process name (on linux). 2) The log file name that this process write to it. It needs to kill the process and verify that the process is down. Change the log file name to a new file name with the time and date. And then run the process again, verify that it's up in order it will continue to write to the log file. Thanks in advance for the help. 回答1: You can retrieve the process id (PID) given it name using pgrep command like

Prevent Activity Stack from being Restored?

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问题 When an application's process is killed, its activity stack is saved. Then when the application is restarted, all my activities resume and run into null pointers. Rather than modify every activity to accommodate this event, I would rather just have my application start with the base activity and not try to re-create the activity stack. Is this possible? I know about Intent.FLAG_ACTIVITY_CLEAR_TOP, but as I understand that will only kill activities after they have been re-created. EDIT: is

How do I kill a process using Vb.NET or C#?

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I have a scenario where I have to check whether user has already opened Microsoft Word. If he has, then I have to kill the winword.exe process and continue to execute my code. Does any one have any straight-forward code for killing a process using vb.net or c#? You'll want to use the System.Diagnostics.Process.Kill method. You can obtain the process you want using System.Diagnostics.Proccess.GetProcessesByName . Examples have already been posted here, but I found that the non-.exe version worked better, so something like: foreach ( Process p in System.Diagnostics.Process.GetProcessesByName(

linux: kill background task

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问题 How do I kill the last spawned background task in linux? Example: doSomething doAnotherThing doB & doC doD #kill doB ???? 回答1: There's a special variable for this in bash: kill $! $! expands to the PID of the last process executed in the background. 回答2: You can kill by job number. When you put a task in the background you'll see something like: $ ./script & [1] 35341 That [1] is the job number and can be referenced like: $ kill %1 $ kill %% # Most recent background job To see a list of job

Python: how to kill child process(es) when parent dies?

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The child process is started with subprocess.Popen(arg) Is there a way to ensure it is killed when parent terminates abnormally? I need this to work both on Windows and Linux. I am aware of this solution for Linux . Edit: the requirement of starting a child process with subprocess.Popen(arg) can be relaxed, if a solution exists using a different method of starting a process. Nathaniel J. Smith Heh, I was just researching this myself yesterday! Assuming you can't alter the child program: On Linux, prctl(PR_SET_PDEATHSIG, ...) is probably the only reliable choice. (If it's absolutely necessary

What does `kill -0 $pid` in a shell script do?

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问题 Basically, what signal does \'0\' represent, because here I see SIGNAL numbers starting from 1. 回答1: sending the signal 0 to a given PID just checks if any process with the given PID is running and you have the permission to send a signal to it. For more information see the following manpages: kill(1) $ man 1 kill ... If sig is 0, then no signal is sent, but error checking is still performed. ... kill(2) $ man 2 kill ... If sig is 0, then no signal is sent, but error checking is still

How to kill all processes matching a name?

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问题 Say I want to kill every process containing the word amarok. I can print out the commands I want to execute. But how do I actually make the shell execute them. ie. ps aux | grep -ie amarok | awk \'{print \"kill -9 \" $2}\' Output: kill -9 3052 kill -9 3071 kill -9 3076 kill -9 3077 kill -9 3079 kill -9 3080 kill -9 3082 kill -9 3083 kill -9 3084 kill -9 3085 kill -9 3086 kill -9 3087 kill -9 3088 kill -9 3089 kill -9 4031 回答1: From man 1 pkill -f The pattern is normally only matched against