Pthread Create Error 12

Wiki Search Tutorials/Articles Search HCL Search Reviews Search ISOs Go to Page... LinuxQuestions.org > Forums > Non-*NIX Forums > Programming pthread_create Cannot allocate memory error code 12 User Name Remember Me? Password Programming This forum is for all programming questions. The question does not have to be directly related to Linux and any language is fair game. Notices Welcome to LinuxQuestions.org, a friendly and active Linux Community. You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today! Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Are you new to LinuxQuestions.org? Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related cookies. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Search this Thread 09-22-2006, 09:28 PM #1 goodman888 LQ Newbie Registered: Sep 2006 Location: HK Posts: 3 Rep: pthread_create Cannot allocate memory error code 12 every time I run the following code, it will stop at i=303, i.e. only 303 threads can be created. I searched Google with my best and couldn't find the answer. There were similar cases reported but no answers.... hope someone can help

in the non-detached mode, and the limited available memory in some system stack is consumed. At that point no new threads can be created in non-detached mode until those threads are detached/killed, or the parent process(es) killed and restarted. Solution: create the threads in the detached state with the pthread_attr_setdetachstate call, e.g.; pthread_attr_init http://www.linuxquestions.org/questions/programming-9/pthread_create-cannot-allocate-memory-error-code-12-a-486157/ (&id_attr); pthread_attr_setdetachstate(&id_attr, PTHREAD_CREATE_DETACHED); pthread_create( , &id_attr, , ); unless you really need the threads in the joinable (non-detached) state, in which case you will have a fixed upper limit to the number of joinable threads active at any one time. In the 2.4 kernels https://www.parkes.atnf.csiro.au/observing/documentation/computing_notes/linux_threads.html I've examined this limit appears to be 256 threads for each parent process(?). Some of this is documented in the man help for pthread_attr_init. However the man help for pthread_create makes no mention of the ENOMEM return and what it means, which is rather confusing. In the Linux 2.2 kernels I've examined the behaviour is slightly different. The system default for the maximum joinable threads alive at any one time seems to be 1024 (rather than 256), and pthread_create returns an error code 11 EAGAIN, and a global errno value of 4 ("Interrupted system call"). The solution is the same as for 2.4: if your process creates lots of threads, make them detached or manage carefully their maximum instantaneous population. John Reynolds December 2004 [an error occurred while processing this directive]

2007, 04:58 PMHey, guys I encountered a strange problem concerning Thread creation. I'm trying to write a Server where every Client is served by a thread, which to https://ubuntuforums.org/archive/index.php/t-336948.html me seems prity effective in my case since I'm using blocking recvs http://dba.stackexchange.com/questions/47029/innodb-error-pthread-create-returned-12 and most of the Threads will stay blocked for most of the time. Now I encountered that after about a few hundred connects of which each starts a thread which in my test cas closes after less then a second due to client disconnect, the Server can't pthread create launch new ClientThreads while the accept call still returns valid sockets (It's after 255 attempts on my Debian Sarge Server and at about 380-382 attempts on Ubuntu and Debian Etch). Another crazy problem is that taking pauses of a few secconds between the connection attempts doesn't make any difference. Which excludes race Conditions as the last Thread will be pthread create error closed when a new one is opned. Luckily I was able to shrink the problem down to a very small piece of Code: #include #include void* mythread(void* ptr){ std::cout<<"Thread started"< out.txt" and count the lines of output which should according to the loop be 500 however "grep -c "Thread started" out.txt" only Counts 255 hits on debian sarge and 382 on Etch and Ubuntu. Can someone please tell me why a process can't open a thread as man

log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top InnoDB: Error: pthread_create returned 12 up vote 2 down vote favorite have installed MySQL in a particular folder. I was able to run the server and create accounts, databases etc. However, now whenever I try to start the server, I get an error: $ mysqld_safe --defaults-file=mysql.cnf & [1] 2002 [compute-0-5 /amber2/scratch/myname/mysql]$ 130725 17:56:24 mysqld_safe Logging to '/amber2/scratch/myname/mysql/data/compute-0-5.local.err'. 130725 17:56:24 mysqld_safe Starting mysqld daemon with databases from /amber2/scratch/myname/mysql/data 130725 17:56:25 mysqld_safe mysqld from pid file /amber2/scratch/myname/mysql/data/compute-0-5.local.pid ended [1]+ Done mysqld_safe --defaults-file=mysql.cnf In the error file inside the data folder: 130725 17:17:53 mysqld_safe Starting mysqld daemon with databases from /amber2/scratch/myname/mysql/data 2013-07-25 17:17:54 0 [Warning] option 'read_buffer_size': unsigned value 2147483648 adjusted to 2147479552 2013-07-25 17:17:54 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2013-07-25 17:17:54 28189 [Warning] Buffered warning: Changed limits: max_open_files: 1024 (requested 5000) 2013-07-25 17:17:54 28189 [Warning] Buffered warning: Changed limits: table_cache: 431 (requested 2000) 2013-07-25 17:17:54 28189 [Note] Plugin 'FEDERATED' is disabled. 2013-07-25 17:17:54 28189 [Note] InnoDB: The InnoDB memory heap is disabled 2013-07-25 17:17:54 28189 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 2013-07-25 17:17:54 28189 [Note] InnoDB: Compressed tables use zlib 1.2.3 2013-07-25 17:17:54 28189 [Note] InnoDB: Using Linux native AIO 2013-07-25 17:17:54 28189 [Note] InnoDB: Not using CPU crc32 instructions 2013-07-25 17:17:54 28189 [Note] In