[B! oom killer] technote7ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

technote7 id:technote7

oom killerã«é–¢ã™ã‚‹technote7ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (4)

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ãƒ¡ãƒ¢ãƒª10GBã‚‚æ®‹ã£ã¦ã¦ã€oom-killerï¼Ÿ - ã‚‚ã«ã£ã
ä»Šã‚»ãƒƒãƒˆã‚¢ãƒƒãƒ—ã—ã¦ã„ã‚‹Linuxã‚µãƒ¼ãƒã§ã€ã¨ã‚ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’å®Ÿè¡Œã—ãŸã‚‰oom-killerãŒã§ã¾ã—ãŸã€‚ å½“ç„¶ãƒ¡ãƒ¢ãƒªä¸è¶³ã ã‚ã†ã¨æ€ã„ã€/var/log/messages ã‚’ç¢ºèªã—ãŸã‚‰ã€ä»¥ä¸‹ã®é€šã‚Š10GBã‚‚ç©ºããƒ¡ãƒ¢ãƒªãŒã‚ã‚Šã¾ã—ãŸã€‚ Dec 12 16:36:49 HOGESERVER kernel: Linux version 2.6.9-34.ELsmp (bhcompile@hs20-bc1-7.build.redhat.com) (gcc version 3.4.5 20051201 (Red Hat 3.4.5-2)) #1 SMP Fri Feb 24 16:54:53 EST 2006 Dec 12 16:52:11 HOGESERVER kernel: Free pages: 10230732kB (10217536kB HighMem) Dec 12 16:52:11 HOGE
technote7 2010/04/02
oom killer
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kernel:Memory Manage(4) OOM Killer - Simple is Beautiful
ç©ºããƒ¡ãƒ¢ãƒªã‚’ç¢ºä¿ã™ã‚‹ä»•çµ„ã¿ã¨ã—ã¦"OOM Killer(Out of Memory Killer)"ã¨ã„ã†ã‚‚ã®ãŒã‚ã‚‹ OOM Killerã¯ã€ç©ºããƒ¡ãƒ¢ãƒªãŒè¶³ã‚Šãªã„å ´åˆã«å¼·åˆ¶çš„ã«Processã‚’çµ‚äº†ã•ã›ã¦å¼·å¼•ã«ç©ºããƒ¡ãƒ¢ãƒªã‚’ç¢ºä¿ã™ã‚‹ OOM Killerã¯ã€ç©ºããƒ¡ãƒ¢ãƒªãŒç¢ºä¿ã§ããªã„ãŸã‚ã«ã‚·ã‚¹ãƒ†ãƒ å…¨ä½“ãŒåœæ¢ã—ã¦ã—ã¾ã†ã“ã¨ã‚’é˜²æ¢ã™ã‚‹ãŸã‚ã«ç”¨æ„ã•ã‚Œã¦ã„ã‚‹ OOM Killerã¯ã‚·ã‚¹ãƒ†ãƒ åœæ¢ã‚’é˜²æ¢ã™ã‚‹ãŸã‚ã«å¿…è¦ãªæ©Ÿèƒ½ã ãŒã€OOM Killerã«ã‚ˆã‚‹å¼·åˆ¶çµ‚äº†ã¯å¤§åˆ‡ãªProcessã‚’åœæ¢ã•ã›ã¦ã—ã¾ã†å±é™ºæ€§ãŒã‚ã‚‹ ã‚¯ãƒ©ã‚¹ã‚¿ã‚·ã‚¹ãƒ†ãƒ ãªã©ã«ãŠã„ã¦ã€ã‚¯ãƒ©ã‚¹ã‚¿ç›£è¦–ProcessãŒå¼·åˆ¶åœæ¢ã•ã›ã‚‰ã‚Œã¦ã—ã¾ã£ãŸå ´åˆã€ãã‚ŒãŒåŽŸå› ã¨ãªã£ã¦ã‚¯ãƒ©ã‚¹ã‚¿ã®éšœå®³ãŒç™ºç”Ÿã—ã¦ã—ã¾ã†å±é™ºæ€§ãŒã‚ã‚‹ kernel2.6.17.1å‘ã‘ã«OOM Killerã‚’ä½¿ç”¨ã›ãšã«kernel panicã‚’èµ·ã“ã•ã›ã‚‹ãƒ‘ãƒƒãƒãŒæŠ•ç¨¿ã•ã‚ŒãŸã€‚ã“ã‚Œã‚’ä½¿ç”¨ã™ã‚‹ã¨ã€ç©ºããƒ¡
technote7 2010/04/02
oom killer
ãƒªãƒ³ã‚¯
DBã‚µãƒ¼ãƒå‘ã‘Linuxãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã‚’è€ƒãˆã‚‹ ã€œ ãƒ¡ãƒ¢ãƒªã‚ªãƒ¼ãƒãƒ¼ã‚³ãƒŸãƒƒãƒˆç·¨ : DSASé–‹ç™ºè€…ã®éƒ¨å±‹
Cã§ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’æ›¸ã„ã¦ã„ã¦å¤§é‡ã®ãƒ¡ãƒ¢ãƒªã‚’ç¢ºä¿ã—ãŸããªã£ãŸã¨ãã€å¤§æŠµã¯ mallocã‚’ä½¿ã†ã¨æ€ã„ã¾ã™ãŒã€ãã®éš›ã«ã¯æˆ»ã‚Šå€¤ãŒNULLã‹ã©ã†ã‹ã‚’åˆ¤æ–ã—ã¦ã‚¨ãƒ©ãƒ¼å‡¦ç†ã«é£›ã°ã™ã¨æ€ã„ã¾ã™ã€‚ã—ã‹ã—ã€Linux ã®ãƒ¡ãƒ¢ãƒªç®¡ç†ã‚µãƒ–ã‚·ã‚¹ãƒ†ãƒ ã«ã¯ã€Œãƒ¡ãƒ¢ãƒªãƒ»ã‚ªãƒ¼ãƒãƒ¼ã‚³ãƒŸãƒƒãƒˆã€ã¨ã„ã†æ©Ÿæ§‹ãŒã‚ã‚Šã€å®Ÿè£…ã•ã‚Œã¦ã„ã‚‹ãƒ¡ãƒ¢ãƒªä»¥ä¸Šã®é ˜åŸŸã‚’ç¢ºä¿ã§ãã¦ã—ã¾ã„ã¾ã™ã€‚ #include <stdio.h> #include <stdlib.h> int main() { int i; char *p; for(i=0;i<65536;i++){ p = (char *)malloc(65536); if(0 == (long)p){ break; } } printf("SIZE=%dMB\n",i*65536/1024/1024); return(0); } swapoff ã—ãŸãƒ¡ãƒ¢ãƒª 1G ã®ãƒžã‚·ãƒ³ã§ã“ã‚Œã‚’å®Ÿè¡Œã™ã‚‹ã¨ã“ã‚“ãªæ„Ÿã˜ã«ãª
technote7 2010/04/02
oom killer
ãƒªãƒ³ã‚¯
CentOSç•°å¸¸ (kiyoeri blog)
Webã‚µãƒ¼ãƒãŒå¿œç”ã—ãªã„ã€‚ VNC,SSHã‚‚å¿œç”ã—ãªã„ãŒPingã¯å¯èƒ½ã€‚ æœ¬ä½“ã®ã‚³ãƒ³ã‚½ãƒ¼ãƒ«ã‚‚å¿œç”ãŒãªã„ã€‚ Power Resetã§ç«‹ã¡ä¸ŠãŒã£ãŸã€‚ 1æœˆ3æ—¥ã«ã‚‚åŒæ§˜ãªç—‡çŠ¶ã§ãƒªã‚¹ã‚¿ãƒ¼ãƒˆã—ã¦ã„ã‚‹ã€‚ åŽŸå› ãŒã‚ˆãåˆ¤ã‚‰ãªã„ã€‚ [var/log/messages] ãƒ»ãƒ»ãƒ»ãƒ» JanÂ 5 05:22:41 kiyoeri kernel: 0 pages of HIGHMEM JanÂ 5 05:22:43 kiyoeri smbd[19431]: [2008/01/05 05:22:43, 0] lib/util_sock.c:send_smb(647) JanÂ 5 05:22:43 kiyoeri kernel: 2151 reserved pages JanÂ 5 05:22:47 kiyoeri smbd[19431]:Â Â Error writing 4 bytes to
technote7 2010/04/02
oom killer
ãƒªãƒ³ã‚¯
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