我将最大打开文件数改为 20000。但是我仍然遇到限制，我发现每个进程都有限制。我想知道如何更改每个进程的默认限制？
ubuntu@ip-172-16-137-139:~$ cat /proc/1237/limits
Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size 8388608 unlimited bytes
Max core file size 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 31538 31538 processes
Max open files 1024 4096 files
Max locked memory 65536 65536 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 31538 31538 signals
Max msgqueue size 819200 819200 bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us
ubuntu@ip-172-16-137-139:~$ 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) 31538
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 20000 <- changed this
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) 31538
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
答案1
getrlimit 和 setrlimit 调用控制大多数每个进程的资源分配限制。RLIMIT_NOFILE控制文件描述符的最大数量。您需要适当的权限才能调用它。