ulimit

How Do I run ulimit -c unlimited automatically

由 断了今生、忘了曾经 提交于 2019-12-11 03:53:01
问题 I am trying to provide support for coredump file generation from my rootfs ,I have modified /etc/limits file with "ulimit -c unlimited" command and "* hard core -1" ,Now when I give kill -6 $$ ,expecting core file generation but to get this core file have to run ulimit -c unlimited explicitly . But I want it to happen automatically , no need to run ulimit -c unlimited it again in shell. Can anybody tell me what changes I have to make for the same to happen 回答1: From a program you can use

Python - OSError 24 (Too many open files) and shared memory

由 ぃ、小莉子 提交于 2019-12-11 03:13:52
问题 I faced with the problem there was exception OSError 24 ("Too many open files") raised on my mac os x in python script. I had no idea what could caused that issue. lsof -p showed about 40-50 lines, and my ulimit was 1200 (I check that using resource.getrlimit(resource.RLIMIT_NOFILE) ), that returned tuple (1200, 1200). So I didn't exceed limit even closely. That my script spawned number of subprocesses and also allocated shared memory segments. Exception occurred while allocating shared

How do I set all ulimits unlimited for all users?

由 我的未来我决定 提交于 2019-12-11 01:45:40
问题 Yes, I want to remove all ulimits and set them to unlimited . How do I do this? Thanks! 回答1: Use something like this: for opt in $(ulimit -a | sed 's/.*\-\([a-z]\)[^a-zA-Z].*$/\1/'); do ulimit -$opt ulimited done Caution, check output of ulimit -a | sed 's/.*\-\([a-z]\)[^a-zA-Z].*$/\1/' first, ulimit -a output may differ from system to system. 来源： https://stackoverflow.com/questions/28068414/how-do-i-set-all-ulimits-unlimited-for-all-users

How to make `docker run` inherit ulimits

由 杀马特。学长 韩版系。学妹 提交于 2019-12-10 17:47:42
问题 Running a command via docker does not seem to adhere to my currently configured ulimit s: $ ulimit -t 5 ~ $ sudo -- bash -c "ulimit -t" 5 ~ $ sudo -- docker run --rm debian:wheezy bash -c "ulimit -t" unlimited How can I make it do that? 回答1: You can set global limits in the Docker daemon config. On Ubuntu, this is managed in Upstart. Add limit cpu <softlimit> <hardlimit> to /etc/init/docker.conf and restart the daemon. On a per container basis, you must use the --privileged flag with docker

Processes resources not limited by setrlimit

由 元气小坏坏 提交于 2019-12-10 03:31:57
问题 I wrote a simple program to restrict it's data size to 65Kb and to verify the same i am allocating a dummy memory of more than 65Kb and logically if i am doing all correct (as below) malloc call should fail, isn't it? #include <sys/resource.h> #include <stdio.h> #include <stdlib.h> #include <errno.h> int main (int argc, char *argv[]) { struct rlimit limit; /* Get max data size . */ if (getrlimit(RLIMIT_DATA, &limit) != 0) { printf("getrlimit() failed with errno=%d\n", errno); return 1; }

Why ulimit can't limit resident memory successfully and how?

由 丶灬走出姿态 提交于 2019-12-09 09:45:23
问题 I start a new bash shell, and execute: ulimit -m 102400 ulimit -a " core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 20 file size (blocks, -f) unlimited pending signals (-i) 16382 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) 102400 open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u)

How and when and where jvm change the max open files value of Linux?

由 馋奶兔 提交于 2019-12-08 03:40:22
问题 In linux there is a limit for max open files for every process of each login user, as below: $ ulimit -n 1024 When I study java nio, I'd like to check this value. Because channel also is a file in Linux,I wrote a client code to create socketChannel continuely until throwing below exception: java.net.SocketException: Too many open files at sun.nio.ch.Net.socket0(Native Method) at sun.nio.ch.Net.socket(Net.java:423) at sun.nio.ch.Net.socket(Net.java:416) at sun.nio.ch.SocketChannelImpl.<init>

浅谈linux性能调优之九:改变系统默认限制

由 泄露秘密 提交于 2019-12-07 12:31:13
看了前两篇，我们都是在想办法节省资源给我们真正的服务。问题：我们的服务真的使用了吗 ？ 答案是否定的，因为系统默认会有一些限制，这些限制也导致了我们应用的限制。这节我们说说linux下面的资源限制，我们来看看下面的数据： [root @localhost Desktop]# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 15311 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 注意！ pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 1024 virtual memory

浅谈linux性能调优之九:改变系统默认限制

由 烂漫一生 提交于 2019-12-07 12:31:03
看了前两篇，我们都是在想办法节省资源给我们真正的服务。问题：我们的服务真的使用了吗 ？ 答案是否定的，因为系统默认会有一些限制，这些限制也导致了我们应用的限制。这节我们说说linux下面的资源限制，我们来看看下面的数据： [root @localhost Desktop]# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 15311 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 注意！ pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 1024 virtual memory

How and when and where jvm change the max open files value of Linux?

由 自古美人都是妖i 提交于 2019-12-06 14:41:13
In linux there is a limit for max open files for every process of each login user, as below: $ ulimit -n 1024 When I study java nio, I'd like to check this value. Because channel also is a file in Linux,I wrote a client code to create socketChannel continuely until throwing below exception: java.net.SocketException: Too many open files at sun.nio.ch.Net.socket0(Native Method) at sun.nio.ch.Net.socket(Net.java:423) at sun.nio.ch.Net.socket(Net.java:416) at sun.nio.ch.SocketChannelImpl.<init>(SocketChannelImpl.java:104) at sun.nio.ch.SelectorProviderImpl.openSocketChannel(SelectorProviderImpl
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