ulimit命令&pthread_create() error: Resource temporarily unavailable

http://www.ibm.com/developerworks/cn/linux/l-cn-ulimit/linux

https://my.vertica.com/docs/5.0/HTML/Master/16468.htmspa

 

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) 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) unlimited
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited線程

能夠看到stack size是8M,  400個線程就須要8*400=3200M,虛擬內存不夠用。htm

 

解決辦法有兩種:ip

1.使用ulimit -s 1024*1024命令,將線程棧大小臨時設置成1M,通過試驗能同時建立2000個線程了。內存

2.使用pthread_attr_setstacksize在程序中改變線程棧大小。get

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