获取和修改linux socket最大连接数
获取和修改linux socket最大连接数 获取linux socket最大连接数
socket连接数的理论值应该和一个进程所能打开的最大文件描述符数相等，所以编写简单程序在Fedora Core Linux下测试得:
#include
#include
#include
int main(int argc, char *argv[])
{
long val;
if((val = sysconf(_SC_OPEN_MAX)) < 0) {
printf("Get the maximum number of files that a process can have open at
any time failed\n");
exit(1);
} else {
printf("The maximum number of files that a process can have open at any
time is %ld\n", val);
}
return 0;
}
结果:The maximum number of files that a process can have open at any time is 1024
修改linux socket最大连接数
有两种方法:
1、ulimit -n 5000
把允许最大打开的描述符修改为5000，只对当前终端打开的应用程序有效。
2、修改/etc/security/limits.conf
/etc/security/limits.conf
#
#Each line describes a limit for a user in the form:
#
# -
#
#Where:
# can be:
# - an user name
# - a group name, with @group syntax
# - the wildcard *, for default entry
# - the wildcard %, can be also used with %group syntax,
# for maxlogin limit
#
# can have the two values:
# - "soft" for enforcing the soft limits
# - "hard" for enforcing hard limits
#
#
- can be one of the following:
# - core - limits the core file size (KB)
# - data - max data size (KB)
# - fsize - maximum filesize (KB)
# - memlock - max locked-in-memory address space (KB)
# - nofile - max number of open files
# - rss - max resident set size (KB)
# - stack - max stack size (KB)
# - cpu - max CPU time (MIN)
# - nproc - max number of processes
# - as - address space limit (KB)
# - maxlogins - max number of logins for this user
# - maxsyslogins - max number of logins on the system
# - priority - the priority to run user process with
# - locks - max number of file locks the user can hold
# - sigpending - max number of pending signals
# - msgqueue - max memory used by POSIX message queues (bytes)
# - nice - max nice priority allowed to raise to values: [-20, 19]
# - rtprio - max realtime priority
#
#
-
#
#* soft core 0
在该文件中添加以下两行:
* soft nofile 5000
* hard nofile 20000
解释:
*
表
关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf
示该配置对所有用户均有效
soft 表示软连接数
hard 表示硬连接数
nofile 配置是针对描述符的
浙公网安备 33021202002483