scheduler

My app is running on App engine Java SDK, and since this morning I noticed that open instances are not handling new requests, and instead, new Frontent instances are being started. So now i have about 250 open instances (a lot more than usual). Also, the instances are running on version 1.9.5. Please advice! The issue has been fixed by Google at 2014-05-09 10:15 (US Pacific Time). See Google App Engine Downtime Notify How we fixed the issue temporarily: Disable and re-enable the application inside the Application Settings. After doing this everything went back to normal. Since then we only saw

The man page for nice says "nice() adds inc to the nice value for the calling process . So, can we use it to change the nice value for a thread created by pthread_create ? EDIT: It seems that we do can set the nice value per thread. I wrote a application ,setting different nice value for different thread, and observed that the "nicer" thread has been scheduled with lower priority. Checking the output, I found that the string "high priority ................" get outputted more frequently. void * thread_function1(void *arg) { pid_t tid = syscall(SYS_gettid); int ret = setpriority(PRIO_PROCESS,

I want to design a lottery scheduler and I need to have a very good (pseudo) random number generator similar to LCG but I was wondering if there are other better choice out there or not? I am specifically looking for random generators written in C. LCG code: unsigned long lcg_rand(unsigned long a) { return (a * 279470273UL) % 4294967291UL; } Also I would like to know if srand() can be used for this purpose or is not highly accurate? If you need simple but decent quality, I would use the upper 32 (or fewer) bits of a 64-bit LCG, possibly with a tempering function applied to the output. When

In a multitasking operating system context, sometimes you hear the term round-robin scheduling. What does it refer to? What other kind of scheduling is there? Round Robin Scheduling If you are a host in a party of 100 guests, round-robin scheduling would mean that you spend 1 minute (a fixed amount) per guest. You go through each guest one-by-one, and after 100 minutes, you would have spent 1 minute with each guest. More on Wikipedia . There are many other types of scheduling, such as priority-based (i.e. most important people first), first-come-first-serve, earliest-deadline-first (i.e.

I have a scheduled job in Spring, I get its cron from my database. Every time it is executed, the next execution time is updated. So, if it is configured to run every 10 minutes, I can change the value into the database to schedule that job every 15 minutes. The problem is that I have to wait for the execution to get the updated cron: if a job is scheduled every 15 minutes and I want to change this value to be every 2 minutes, I have to wait for the next execution (up to 15 minutes) to have this job every 2 minutes. Is there a way to get this job rescheduled after I update the database? I

I need a Task Scheduler for Windows. Unfortunately the builtin scheduler doesn't meet my needs, which are: can run tasks every minute/hour runs on Linux and Windows 32 and 64 bit versions GUI interface free Nice to haves: supports CRON files open source status reports of execution times thanks! Joey Just some corrections on your claims regarding the Windows Task Scheduler. can run tasks every minute/hour Every hour: (source: hypftier.de ) or minute: (source: hypftier.de ) runs on Linux and Windows Ok, you get that probably only with cron. But Windows and Linux are different enough to warrant

How can I execute an action (maybe an Intent) on every specified time (e.g. Every day on 5AM)? It has to stay after device reboots, similar to how cron works. I am not sure if I can use AlarmManager for this, or can I? If you want it to stay after the device reboots, you have to schedule the alarm after the device reboots. You will need to have the RECEIVE_BOOT_COMPLETED permission in your AndroidManifest.xml <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> A BroadcastReceiver is needed as well to capture the intent ACTION_BOOT_COMPLETED <receiver android:name="

Who schedules the scheduler? Which is the first task created and how is this first task created? Isn't any resource or memory required for it? isn't like a chicken and egg scenario? Isn't scheduler a task? Does it get the CPU at the end of each time slice to check which task needs to be given CPU? Are there any good links which makes a person think and understand deeply all these concepts rather than spilling out some theory which needs to be byhearted? The scheduler is scheduled by an (external) event such as an interrupt, (disk done, mouse click, timer tick) or an internal event (such as the