On Fri, Aug 26, 2011 at 4:39 PM, Marek Otahal wrote:

Hi guys,

in last days i'm severely bugged by some resource limits on my machine..my applications fail to run etc.

I'm running on a netbook that is slow by default, but i've been on it for a few years and it was ok. I'm running normal KDE, IM client, kmail, firefox (with a lot, cca 30) tabs open, a konsole and netbeans ide.

The thing is I remember I once played with some limits to avoid forkbombs etc..so my question is if you could point me to some files to check for configs?

This is my top output: $ top top - 22:19:59 up 1 day,  7:19,  3 users,  load average: 1.06, 1.56, 1.34 Tasks: 199 total,   1 running, 196 sleeping,   0 stopped,   2 zombie Cpu(s):  1.8%us,  2.5%sy,  0.0%ni, 95.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st Mem:   2055224k total,  1748036k used,   307188k free,    13632k buffers Swap:  2561304k total,   938420k used,  1622884k free,  1119728k cached

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND 20689 marek     20   0  223m  60m  17m S    4  3.0   2:08.92 skype  1322 root      20   0  113m  21m 4552 S    1  1.1  65:50.10 X  3385 marek     20   0  6124  840  604 S    1  0.0  15:13.67 scdaemon  6421 marek     20   0  936m 137m  16m S    1  6.9   0:59.12 java  6832 marek     20   0  2576 1032  756 R    1  0.1   0:01.37 top  3216 marek     20   0  115m  12m 7156 S    1  0.6  31:17.96 konsole 22696 marek     20   0  177m 8828 5240 S    1  0.4   6:52.92 kget  2707 marek     20   0  5576  344  212 S    0  0.0   2:52.82 gpg-agent  3275 marek     20   0  119m 5124 3136 S    0  0.2   2:36.09 kleopatra  3449 marek     20   0  101m 4280 2720 S    0  0.2   0:57.63 klipper  6451 root      20   0     0    0    0 S    0  0.0   0:23.52 kworker/0:2    1 root      20   0  1880   24    0 S    0  0.0   0:19.49 init    2 root      20   0     0    0    0 S    0  0.0   0:00.06 kthreadd    3 root      20   0     0    0    0 S    0  0.0   0:03.84 ksoftirqd/0    6 root      RT   0     0    0    0 S    0  0.0   0:00.00 migration/0   13 root       0 -20     0    0    0 S    0  0.0   0:00.00 cpuset   14 root       0 -20     0    0    0 S    0  0.0   0:00.00 khelper   15 root       0 -20     0    0    0 S    0  0.0   0:00.00 netns   16 root      20   0     0    0    0 S    0  0.0   0:00.25 sync_supers   17 root      20   0     0    0    0 S    0  0.0   0:00.00 bdi-default   18 root       0 -20     0    0    0 S    0  0.0   0:00.00 kblockd   20 root      20   0     0    0    0 S    0  0.0   0:00.14 khungtaskd

Ulimit says $ ulimit -a core file size          (blocks, -c) 0 data seg size           (kbytes, -d) unlimited scheduling priority             (-e) 30 file size               (blocks, -f) unlimited pending signals                 (-i) 16028 max locked memory       (kbytes, -l) 80000 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) 75 stack size              (kbytes, -s) 8192 cpu time               (seconds, -t) unlimited max user processes              (-u) 250 virtual memory          (kbytes, -v) unlimited file locks                      (-x) unlimited

and I use pm-utils, should that matter?

I used to run the system under similar load and it was ok, now eg. my compiles in netbeans fail, says OutOfMemoryException or sometimes cannot create a new native thread. (openjdk), also command line tools fail with things like $ man scdaemon man: fork failed: Resource temporarily unavailable I wonder is it the memory consumed by netbeans or some number of process/open files limit or something?

I'm glad for any suggestions, as now if i want to develop in java, i have to shut down browser, chat and even though...

Thank you, Mark

PS: i know..but now i'd not like to hear suggestions like using a lighter DE or buying better hw ;)

--

Marek Otahal :o)

Hello, Since you mention messing around with forkbomb prevention, I'm thinking something was changed when you were doing that. The failed fork error from man also hints at that. Try running the following commands and then check if those errors still persist. They are arbitrarily large limits that you shouldn't hit. ulimit -u 8000 sysctl -w kernel.threads-max=50000 If that doesn't work you could check the following files for some potential problem configurations: /etc/security/limits.conf /etc/sysctl.conf Good luck, Jason (canyonknight)

2011/8/26 Marek Otahal

Hi guys,

in last days i'm severely bugged by some resource limits on my machine..my applications fail to run etc.

I'm running on a netbook that is slow by default, but i've been on it for a few years and it was ok. I'm running normal KDE, IM client, kmail, firefox (with a lot, cca 30) tabs open, a konsole and netbeans ide.

The thing is I remember I once played with some limits to avoid forkbombs etc..so my question is if you could point me to some files to check for configs?

This is my top output: $ top top - 22:19:59 up 1 day, 7:19, 3 users, load average: 1.06, 1.56, 1.34 Tasks: 199 total, 1 running, 196 sleeping, 0 stopped, 2 zombie Cpu(s): 1.8%us, 2.5%sy, 0.0%ni, 95.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 2055224k total, 1748036k used, 307188k free, 13632k buffers Swap: 2561304k total, 938420k used, 1622884k free, 1119728k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 20689 marek 20 0 223m 60m 17m S 4 3.0 2:08.92 skype 1322 root 20 0 113m 21m 4552 S 1 1.1 65:50.10 X 3385 marek 20 0 6124 840 604 S 1 0.0 15:13.67 scdaemon 6421 marek 20 0 936m 137m 16m S 1 6.9 0:59.12 java 6832 marek 20 0 2576 1032 756 R 1 0.1 0:01.37 top 3216 marek 20 0 115m 12m 7156 S 1 0.6 31:17.96 konsole 22696 marek 20 0 177m 8828 5240 S 1 0.4 6:52.92 kget 2707 marek 20 0 5576 344 212 S 0 0.0 2:52.82 gpg-agent 3275 marek 20 0 119m 5124 3136 S 0 0.2 2:36.09 kleopatra 3449 marek 20 0 101m 4280 2720 S 0 0.2 0:57.63 klipper 6451 root 20 0 0 0 0 S 0 0.0 0:23.52 kworker/0:2 1 root 20 0 1880 24 0 S 0 0.0 0:19.49 init 2 root 20 0 0 0 0 S 0 0.0 0:00.06 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:03.84 ksoftirqd/0 6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0 13 root 0 -20 0 0 0 S 0 0.0 0:00.00 cpuset 14 root 0 -20 0 0 0 S 0 0.0 0:00.00 khelper 15 root 0 -20 0 0 0 S 0 0.0 0:00.00 netns 16 root 20 0 0 0 0 S 0 0.0 0:00.25 sync_supers 17 root 20 0 0 0 0 S 0 0.0 0:00.00 bdi-default 18 root 0 -20 0 0 0 S 0 0.0 0:00.00 kblockd 20 root 20 0 0 0 0 S 0 0.0 0:00.14 khungtaskd

Ulimit says $ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 30 file size (blocks, -f) unlimited pending signals (-i) 16028 max locked memory (kbytes, -l) 80000 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) 75 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 250 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited

and I use pm-utils, should that matter?

I used to run the system under similar load and it was ok, now eg. my compiles in netbeans fail, says OutOfMemoryException or sometimes cannot create a new native thread. (openjdk), also command line tools fail with things like $ man scdaemon man: fork failed: Resource temporarily unavailable I wonder is it the memory consumed by netbeans or some number of process/open files limit or something?

I'm glad for any suggestions, as now if i want to develop in java, i have to shut down browser, chat and even though...

Thank you, Mark

PS: i know..but now i'd not like to hear suggestions like using a lighter DE or buying better hw ;)

--

Marek Otahal :o)

You have 200 tasks running and ulimits reports that the number of processes is limited to 250, this is probably the reason of your problems (and it has something to do with trying to prevent forkbombs). You can check it by running top during a failing netbeans compile. The number of tasks should reach 250 without being able to get bigger. How are you starting KDE? Are you using kdm? You should check your bash config files: /etc/profile, ~/.profile, ~/.bash_profile, ~/.bash_login, ~/.bashrc