linux 设置coredump 大小和路径

有时候直接在shell执行 ulimit -c unlimited , 还是不会生成 core文件

1） 需要修改 limits.conf

vim /etc/security/limits.conf

  *               soft    core             1000000000    # 1G

  *               hard    core            10000000000  # 10G  安全起见； 也可以设置成 unlimited

2） 另外就是 修改 core-pattern 配置core的格式和路径

vim /etc/sysctl.conf

kernel.core_pattern=core_%e_%p   # 不加路径代表就是进程运行目录，查找方便，不过需要注意磁盘空间是否足够； 也可以指定目录 /tmp/core_%e_%p

保存退出 :x

sysctl -p  /etc/sysctl.conf  设配置立即永久生效

kill -11 pid  可以测试是否生成core文件

如果 只是本次服务器启动期间有效 

echo "/corefile/core-%e-%p" > /proc/sys/kernel/core_pattern

3）以下是摘自linux-2.6.32.59\Documentation\sysctl\kernel.txt

core_pattern:

core_pattern is used to specify a core dumpfile pattern name. 

. max length 128 characters; default value is "core" 

. core_pattern is used as a pattern template for the output filename;

  certain string patterns (beginning with '%') are substituted with

  their actual values. 

  . backward compatibility with core_uses_pid: 

  If core_pattern does not include "%p" (default does not)

  and core_uses_pid is set, then .PID will be appended to

  the filename. 

. corename format specifiers:

  %  '%' is dropped

  %%  output one '%'

  %p  pid

  %u  uid

  %g  gid

  %s  signal number

  %t  UNIX time of dump

  %h  hostname

  %e  executable filename

  % both are dropped . 

  If the first character of the pattern is a '|', the kernel will treat 

  the rest of the pattern as a command to run.  The core dump will be 

  written to the standard input of that program instead of to a file.

========================================================================

core_uses_pid:

The default coredump filename is "core".  By setting 

core_uses_pid to 1, the coredump filename becomes core.PID. 

If core_pattern does not include "%p" (default does not) 

and core_uses_pid is set, then .PID will be appended to

the filename.

参考链接：

https://blog.csdn.net/u014221266/article/details/52785917

https://blog.csdn.net/wangpeihuixyz/article/details/10297927