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ƯÁ¤ ½ÃÁ¡¿¡ RAM¿¡ µé¾îÀÖ´Â ³»¿ëÀ» Á¾ÀÌ¿¡ ÀμâÇϰųª, ¶Ç´Â HDD¿Í °°Àº º¸´Ù ¿µ±¸ÀûÀÎ ¸Åü¿¡ º¹»çÇØ µÎ´Â ÇàÀ§¸¦ ¸»ÇÑ´Ù.
¾î¶² »ç¶÷µéÀº ÀÌ°ÍÀ» ·¥¿¡ ´ëÇÑ ½º³À»çÁøÀ̶ó°í ¸»Çϸç ÄÚ¾î´ýÇÁ´Â ÁÖ·Î ÇÁ·Î±×·¥À» µð¹ö±ëÇϱâ À§ÇÑ ¸ñÀûÀ¸·Î ÇàÇØÁöÁö¸¸, ¿äÁò¿¡´Â °í±Þ ¾ð¾î¸¦ ÀÌ¿ëÇØ ÇÁ·Î±×·¡¹ÖÀ» ÇÏ¸é¼ ÀÎÅÍ·¢Æ¼ºê Çü½ÄÀ¸·Î µð¹ö±ëÀ» ÇÏ´Â Ãß¼¼¿¡ µû¶ó, ¹®Á¦ ÇØ°áÀ» À§ÇØ ÄÚ¾î ´ýÇÁ¸¦ ÇÊ¿ä·Î ÇÏ´Â °æ¿ì´Â ÁÙ¾îµé°í ¿ÀÈ÷·Á ¿î¿µÃ¼Á¦¸¦ À¯Áöº¸¼öÇÏ°í ¶§·Î ±×¾È¿¡ ÀÖ´Â ¹®Á¦µéÀ» µð¹ö±ë ÇØ¾ß ÇÏ´Â ½Ã½ºÅÛ ÇÁ·Î±×·¡¸Óµé¿¡ ÀÇÇØ »ç¿ëµÇ´Â °æ¿ì°¡ ¸¹´Ù.
ÄÚ¾î´ýÇÁ´Â ´ëü·Î ¿©·¯°³ÀÇ ÁÙ·Î ±¸¼ºµÈ Á¤ÇüÈµÈ º¸°í¼ÀÇ ÇüÅ·ΠµÇ¾îÀÖÀ¸¸ç À̵éÀº °¢ ¸Þ¸ð¸® À§Ä¡¿Í ±×À§Ä¡¿¡ ÀúÀåµÈ °ªÀ» 16Áø¼ö·Î º¸¿©ÁØ´Ù.
ºÎ°¡Á¤º¸¸¦ ÅëÇØ ÄÚ¾î ´ýÇÁ°¡ ½ÃÀ۵Ǵø ¹Ù·Î ±×½Ã±â¿¡ ¼öÇàµÇ¾ú´ø ¸í·ÉÀ» Á¤È®È÷ ¾Ë¼ö ÀÖ´Ù.
core dumpd ´Â ÇÁ·Î±×·¥ÀÇ ºñÁ¤»óÀûÀÎ Á¾·á(Segmentation Faultµî)½Ã Ä¿³Î¿¡¼ ±×¶§ »óȲÀ» ´ýÇÁ½ÃŲ ÆÄÀÏÀÌ´Ù. ¸®´ª½º´Â ±âº»ÀûÀ¸·Î ÄÚ¾î ´ýÇÁ¸¦ ÇÏÁö ¾Ê´Âµ¥ À̸¦ È°¼ºÈ ½ÃÅ°·Á¸é ´ÙÀ½°ú °°´Ù.
OS : Fedora18 x86_64core dump »çÀÌÁî È®ÀÎ
# 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) 254704
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) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
ÆÄÀÏ»çÀÌÁî ¹«Á¦ÇÑ
# ulimit -c unlimited
Ä¿³ÎÆĶó¹ÌÅÍ ¼öÁ¤
# vim /etc/sysctl.conf
kernel.core_pattern = /var/log/core.%e
kernel.core_uses_pid = 1
%% A single % character %p PID of dumped process %u real UID of dumped process %g real GID of dumped process %s number of signal causing dump %t time of dump (seconds since 0:00h, 1 Jan 1970) %h hostname (same as ¡¯nodename¡¯ returned by uname(2)) %e executable filename |
# systcl -p
# cat /proc/sys/kernel/core_pattern
/var/log/core.%e
# cat /proc/sys/kernel/core_pipe_limit
0
# cat /proc/sys/kernel/core_uses_pid
1
# selinuxenabled && echo enabled || echo disabled
# ulimit -c
0
# yum install --enablerepo=fedora-debuginfo crash kernel-debuginfo
crash ¸í·É
sys - ½Ã½ºÅÛÀÇ ÀϹÝÀûÀÎ Á¤º¸¸¦ Ãâ·ÂÇØ ÁØ´Ù.
bt - Backtrace ¸í·É. ½ºÅÃÀÇ ³»¿ëµéÀ» ¼øÂ÷ÀûÀ¸·Î Ãâ·ÂÇØÁØ´Ù.
ps - Process list Ãâ·Â.
free - Memory ¹× ½º¿Ò »óÅ Ãâ·Â.
mount - ¸¶¿îÆ® »óÅ Ãâ·Â
irq - °¢ ÀåÄ¡ÀÇ ( irq ) »óŸ¦ Ãâ·Â.
kmem - ¸Þ¸ð¸® »óÅ Ãâ·Â ( kmalloc, valloc µî ¸Þ¸ð¸® ÇÒ´ç »óŵµ º¸¿©ÁÜ )
log - dmesg ÀÇ ³»¿ëÀ» Ãâ·Â.
mod - ·ÎµùµÈ ¸ðµâ ¸®½ºÆ® Ãâ·Â.
net - Network »óÅÂ Ãâ·Â.
runq - ½ÇÇàÁßÀÎ task ¸®½ºÆ® Ãâ·Â.
task - ÀÛ¾÷¸ñ·Ï Ãâ·Â.
rd - ¸Þ¸ð¸® ¹øÁö¼ö¿¡ ´ëÇÑ »ó¼¼Á¤º¸ Ãâ·Â.
foreach - ¸ðµç task, process µî µð¹ö±ë Á¤º¸¿¡ ´ëÇÑ »ó¼¼ÇÑ Ãâ·ÂÀÌ °¡´ÉÇÔ.
set - ¼³Á¤µÈ ÁÖ¼Ò ¹× PID µîÀ» ±âº» ÄÁÅؽºÆ®·Î ¼³Á¤.
struct - ±¸Á¶ÈµÈ ¸Þ¸ð¸® ³»ºÎÀÇ º¯¼öµéÀ» Ãâ·ÂÇØ ÁØ´Ù.
files - task °¡ ¿°íÀÖ´Â ÆÄÀϵð½ºÅ©¸³Å͵éÀ» Ãâ·ÂÇØÁØ´Ù.