I'm running Linux OS (Ubuntu) on virtual box. When I am running the command
ulimit -Sv 50
It's not setting the soft limit for virtual memory size in that bash session. The error I'm getting is:
fatal error: out of heap memory
I was running above command with sudo access. The output of ulimit -a is as follow:
-t: cpu time (seconds) unlimited
-f: file size (blocks) unlimited
-d: data seg size (kbytes) unlimited
-s: stack size (kbytes) 8192
-c: core file size (blocks) 0
-m: resident set size (kbytes) unlimited
-u: processes 515266
-n: file descriptors 1024
-l: locked-in-memory size (kbytes) 64
-v: address space (kbytes) unlimited
-x: file locks unlimited
-i: pending signals 515266
-q: bytes in POSIX msg queues 819200
-e: max nice 0
-r: max rt priority 0
-N 15: unlimited
I ran a binary with AFL using memory size (-m) = 50 MB. So, I need to run this binary (without AFL) with the same memory size. Any insights will be helpful.
Looks like you are setting limit to 50 kilobytes and not 50 megabytes (see units in help ulimit).
Related
I am trying to fetch a dump file from one of my Ubuntu servers. The dump file is stored in .gzip format and his size is about 3GB. And then when I execute a scp command in macOS Big Sur Version 11.6 the download begins normally. After that when about 95MB has bin downloaded the command stops with this message.
sh: file size limit exceeded scp -P1021 /Users/andrej/Desktop
even though I have enough space on my machine
enter image description here
Also the settings for filesize limit is set to unlimitted on my laptop here is the output of the launchctl limit command from my terminal and ulimit -a.
% launchctl limit
cpu unlimited unlimited
filesize unlimited unlimited
data unlimited unlimited
stack 8388608 67104768
core 0 unlimited
rss unlimited unlimited
memlock unlimited unlimited
maxproc 2784 4176
maxfiles 64000 524288
The output of ulimit -a
% ulimit -a
-t: cpu time (seconds) unlimited
-f: file size (blocks) 200000
-d: data seg size (kbytes) unlimited
-s: stack size (kbytes) 8192
-c: core file size (blocks) 0
-v: address space (kbytes) unlimited
-l: locked-in-memory size (kbytes) unlimited
-u: processes 2042
-n: file descriptors 65536
Maybe someone has encountered a similar problem? Any help would be appreciated.
I had not noticed that I had a configuration set to 200000 for the filesize when I run the ulimit -a command. The issue was resolved after setting this value to unlimited.
try using rsync utility it's well suited with large files
Description
Recently I've run into an problem. I am not able to run yarn start in element-web directory, I get these errors. Originally I thought it had something to do with element-web itself so I created an issue. Some time after that I tried to run wintersmith preview in bibviz directory and got the same errors. This was weird so I tried to create an Angular project and run ng serve and errors again. I headed to the issue to close it as it wasn't an element-web issue. I found that there was another issue created with the same problem. It had already been closed by turt2live saying it looks like you've run out of memory on your system. Based on this I tried to turn of most programs running in the background and now all the commands worked.
I am sure that ng serve used to work in the past.
My PC has 16 GB of RAM and the commands already fail when I am on 7/16 GB. I can't see any memory spikes when running the commands. Running the commands with sudo also completely eliminates the problem. This doesn't make any sense to me.
Research lead me to ulimits but they seem to have no effect. I have also installed watchman with no effect.
Can someone tell me what I am missing?
Thank you in advance!
Info
I am on Debian 11 Bullseye. This is the output of a few commands that could be useful.
As a regular user:
> uname -a
Linux Simon-s-PC 5.8.0-3-amd64 #1 SMP Debian 5.8.14-1 (2020-10-10) x86_64 GNU/Linux
> sudo sysctl fs.inotify.max_user_watches
fs.inotify.max_user_watches = 524288
> ulimit -a
-t: cpu time (seconds) unlimited
-f: file size (blocks) unlimited
-d: data seg size (kbytes) unlimited
-s: stack size (kbytes) 8192
-c: core file size (blocks) 0
-m: resident set size (kbytes) unlimited
-u: processes 46482
-n: file descriptors 8192
-l: locked-in-memory size (kbytes) unlimited
-v: address space (kbytes) unlimited
-x: file locks unlimited
-i: pending signals 63664
-q: bytes in POSIX msg queues 819200
-e: max nice 0
-r: max rt priority 95
-N 15: unlimited
> yarn --version
1.22.5
With sudo su:
> sysctl fs.inotify.max_user_watches
fs.inotify.max_user_watches = 524288
> ulimit -a
-t: cpu time (seconds) unlimited
-f: file size (blocks) unlimited
-d: data seg size (kbytes) unlimited
-s: stack size (kbytes) 8192
-c: core file size (blocks) 0
-m: resident set size (kbytes) unlimited
-u: processes 63664
-n: file descriptors 1024
-l: locked-in-memory size (kbytes) 2043392
-v: address space (kbytes) unlimited
-x: file locks unlimited
-i: pending signals 63664
-q: bytes in POSIX msg queues 819200
-e: max nice 0
-r: max rt priority 0
-N 15: unlimited
I think I've found a solution:
Set limits in /etc/sysctl.conf by adding:
fs.inotify.max_user_watches=524288
fs.inotify.max_user_instances=512
Open a new terminal or reload sysctl.conf variables with
sudo sysctl --system
Run yarn start
Everything should work fine now, hopefully. If it doesn't work try setting the limits higher.
Where could be ulimit -v global setting stored?
> me#server:/home/me : ulimit -a
core file size (blocks, -c) 1
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 61817
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) 6736760
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) 61817
virtual memory (kbytes, -v) 9695920
file locks (-x) unlimited
I can increase virtual memory by ulimit -v INTEGER, but this command affects only my current session.
In these files I have not defined ulimit -v
me#server:/home/me : cat /etc/profile | grep ulimit
# ulimit package instead to set up ulimits and your PATH.
# ulimit -Sc 0 # don't create core files
# ulimit -Sd $(ulimit -Hd)
# ulimit -Ss $(ulimit -Hs)
# ulimit -Sm $(ulimit -Hm)
me#server:/home/me : cat /etc/security/limits.conf | grep ulimit
me#server:/home/me :
Where could be virtual memory value 9695920 defined or where is it from?
Thanks for your help.
s.
ulimit -v is in /etc/initscript calculated from MemTotal and SwapTotal
me#server:/proc : cat ./meminfo
MemTotal: 7925532 kB
SwapTotal: 4194300 kB
I'm using 32bit Amazon Linux (Centos?). Per the blog http://gnufreakz.wordpress.com/2009/08/12/increase-ulimit-in-centos/ I tried changing some parameters.
I added the below line to /etc/sysctl.conf
fs.file-max = 65536
and ran sysctl -p
I added the below line to /etc/security/limits.conf
* hard nofile 65536
No luck! After a restart, ulimit -a still gives me:
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 26597
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
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) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
Try adding
ulimit -n 65536
to your /etc/profile or to /home/[username]/.bash_profile
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) unlimited
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
"
and then ,I execute compiling a huge project. the Linking of it will use large memory, more then 2G. The result, process ld used more then 2G resident memory.
is there any wrong ? how to use ulimit or can I use other programs to limit resident memory?
the target of limit resident memory, is because computer will freeze when one process almost used all memory.
According to the man page for setrlimit:
RLIMIT_RSS
Specifies the limit (in pages) of the process's resident set (the number of virtual pages resident in RAM). This limit only has effect in Linux 2.4.x, x < 30, and there only affects calls to madvise(2) specifying MADV_WILLNEED
You probably want to set the virtual memory size instead, via ulimit -v
You can restrict the resident memory using cgroups. See Resident Set Size (RSS) limit has no effect