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Last week, some users reported to us that they encountered error 12, due to which it is impossible to allocate a memory fork, and the new process cannot fork.
unable to allocate memory very often indicates an out-of-memory (OOM) error.
This can be very common on small EC2 instances, eg If you don’t set this storage limit, your applications can be served by the operating system.
Your program (in this case Apache) is trying to allocate memory (which it’s trying to get based on its configuration), and that OS just doesn’t have much to give away.
Migrate to one larger EC2 instance with fast memory. This clearly didn’t solve the actual end result of the problem, but given the website’s low enough traffic, it might even have prevented it.
Of course, now this is only an option if the budget allows…
Add Disk Storage (swap)
sudo dd if=/dev/zero of=/var/swapfile bs=1M count=4096sudo chmod 600 /var/swapfilesudo mkswap /var/swap filesudo swapon /var/swap file
Warning. Improper implementation of swapping can easily lead to malicious situations such as punching
Reasonableuse Existing Memory
Read the message you need to fix Apache’s reallocation plan – failed to allocate memory.
How to find the current error
This error is available in the Apache error log on your Linux platform.
- Apache cannot fork new process – cannot allocate memory.
What are the appropriate reasons
- There is not enough free memory on the server to process MPM events of modern processes .< /li>
Analysis of the cause(s)
Perhaps here is an example of htop output if you use the “htop” command:
Again, without a doubtnii, an example where the output is usually triggered by the “free -m” command:
Analysis of htop shows that Apache is using a lot of memory. Indicates that only 791 MB is available on the server. This web server has enough disk space, but this can be a problem if the Get server is busy. (Note: if you don’t see an “Available” ticket, look at the total memory to get free + buff/cache.) Don’t rely on total used vs free columns results! Read Linux ate my RAM for more on this topic.
Free also means that there are very few swap files on the server. The switch file provides an extra buffer in case the memory is full. The server will not allow fork() operations if it does not have enough memory (cache, real, or RAM).
Solution(s) to this actual problem
What solution did you find for the “Apache cannot fork all new processes – unable to allocate memory” error? Publish your solution to http://anto.online!
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[Fri Apr 12 17:11:04.375181 2019] [pid [core:notice] 18370:tid 140067138411456] AH00094: command scope: '/usr/sbin/apache2'[Fri Apr 12 17:11:04.2019] 399018 [mpm_event:error] pid 18370:tid 140067138411456 Unable to allocate space: AH00481: Fork: Unable to fork last process[Fri Apr 12 5:12:03.250007 2019] [pid [mpm_event:notice] 18370:tid 140067138411456] AH00493: SIGUSR1 won. Perform a soft restart[Fri Apr Twelve Months 17:12:03.667322 2019] [:emerg] [pid 18370:tid 140067138411456] AH00020: installation failed on exit
[email protected]:~$ free -m total spent 100% of free spent buffs/cache availableMemory: 1991 987 223 36 779 791Exchange: 0 0 0Get better performance from your computer with this software - download it to fix your PC today.
Erreur 12impossible D Allouer De La Memoire Fork Impossible De Forker Un Nouveau Processus
Oshibka 12 Ne Mozhet Vydelit Vilku Pamyati Nesposobnuyu Razvetvit Novyj Process
Fel 12 Kan Inte Allokera Minnesgaffeln Kan Inte Dela Ny Process
Fehler 12 Kann Keine Speicherverzweigung Zuweisen Die Keinen Neuen Prozess Verzweigen Kann
Blad 12 Nie Mozna Przydzielic Rozwidlenia Pamieci Nie Mozna Rozwidlic Nowego Procesu
Fout 12 Kan Geheugenvork Niet Toewijzen Kan Nieuw Proces Niet Splitsen
Erro 12nao E Possivel Alocar Bifurcacao De Memoria Incapaz De Bifurcar Novo Processo
Error 12 No Se Puede Asignar La Bifurcacion De Memoria No Se Puede Bifurcar El Nuevo Proceso
오류 12메모리를 할당할 수 없습니다 포크는 새 프로세스를 포크할 수 없습니다
Errore 12impossibile Allocare Il Fork Di Memoria Incapace Di Eseguire Il Fork Di Un Nuovo Processo