wait

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 Manual cleanup: You can KILL the processid. mysql> show full processlist; +---------+------------+-------------------+------+---------+-------+-------+--------------

I am writing some Java Webdriver code to automate my application. How can I correctly check whether the page has been loaded or not? The application has some Ajax calls, too. I have declared an implicit wait for WebDriver. Petr Janeček Selenium does it for you. Or at least it tries its best. Sometimes it falls short, and you must help it a little bit. The usual solution is Implicit Wait which solves most of the problems. If you really know what you're doing, and why you're doing it, you could try to write a generic method which would check whether the page is completely loaded. However, it can

I need to use the fork() and wait() functions to complete an assignment. We are modelling non-deterministic behaviour and need the program to fork() if there is more than one possible transition. In order to try and work out how fork and wait work, I have just made a simple program. I think I understand now how the calls work and would be fine if the program only branched once because the parent process could use the exit status from the single child process to determine whether the child process reached the accept state or not. As you can see from the code that follows though, I want to be

What is difference between wait and sleep ? MRAB wait waits for a process to finish; sleep sleeps for a certain amount of seconds. wait is a BASH built-in command. From man bash : wait [n ...] Wait for each specified process and return its termination sta- tus. Each n may be a process ID or a job specification; if a job spec is given, all processes in that job's pipeline are waited for. If n is not given, all currently active child pro- cesses are waited for, and the return status is zero. If n specifies a non-existent process or job, the return status is 127. Otherwise, the return status is

进程等待的必要性 之前讲过，子进程退出，父进程如果不管不顾，就可能造成‘僵尸进程’的问题，进而造成内存泄漏。 另外，进程一旦变成僵尸状态，那就刀枪不入， “杀人不眨眼”的kill -9 也无能为力 ，因为谁也没有办法 杀死一个已经死去的进程。 最后，父进程派给子进程的任务完成的如何，我们需要知道。如，子进程运行完成，结果对还是不对， 或者是否正常退出。 父进程通过进程等待的方式，回收子进程资源，获取子进程退出信息。 进程等待的方法 wait方法 #include<sys/types.h> #include<sys/wait.h> pid_t wait(int *status); 返回值： 成功返回被等待进程pid，失败返回-1 参数： 输出型参数，获取子进程的退出状态，不关心则可以设置为NULL waitpid方法 pid_t waitpid(pid_t pid, int *status, int options); 返回值： 正常返回的时候，waitpid返回收集到的子进程ID 如果设置了选项WNOHANG，而调用中waitpid发现没有已退出的子进程可收集,则返回0； 如果调用中出错,则返回-1,这时errno会被设置成相应的值以指示错误所在； 参数： pid： pid = -1，等待任一个子进程，与wait等效 pid > 0,等待其进程ID与pid相等的子进程。