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ori53 id:ori53

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OOM Killerã«ã§ã‚ã£ãŸã‚‰ä½•ã‚’ã™ã‚‹ã¹ãã‹?
OOM killerã§å¤§äº‹ãªãƒ—ãƒã‚»ã‚¹ãŒæ®ºã•ã‚Œã‚‹ã€‚å›°ã‚Šã¾ã™ãã€‚ã€‚ google ã§ OOM Killerã¨å…¥åŠ›ã™ã‚‹ã¨ ã€Œç„¡åŠ¹ã€ã¨ã‹è£œå®Œã•ã‚Œã¾ã™ã€‚ã—ã‹ã—ã©ã†ã™ã‚‹ã®ãŒè‰¯ã„ã®ã‹ã€ã‚ã¾ã‚Šã‚ˆãèª¬æ˜Žã•ã‚Œã¦ã„ã‚‹è¨˜äº‹ãŒã¿ã‚ãŸã‚‰ãªã‹ã£ãŸã®ã§è‡ªåˆ†ã®è€ƒãˆã‚’ãƒ¡ãƒ¢ã—ã¦ãŠãã¾ã™ã€‚ OOM Killer ã®ç›®çš„ã¯ä½•ã‹? ã¾ãšã¯ä½•æ•…OOM KillerãŒç™ºç”Ÿã—ã¦ã„ã‚‹ã®ã‹ã«ã¤ã„ã¦ã€ã–ã£ãã‚Šã‚¤ãƒ¡ãƒ¼ã‚¸ã‚’ã¤ã‹ã¿ã¾ã—ã‚‡ã†ã€‚linux kernelã¯ãƒ—ãƒã‚»ã‚¹ã‹ã‚‰ã®ã€Œãƒ¡ãƒ¢ãƒªãã‚Œã€ã¨ã„ã†è¦æ±‚ã«å¯¾ã—ã¦ãŸã¶ã‚“è¶³ã‚Šãã†ã ã¨ã„ã†å ´åˆã«ã€ŒOKã€ã¨ã„ã£ã¦æ¸¡ã—ã¾ã™ã€‚å®Ÿéš›ã®ãƒ¡ãƒ¢ãƒªå‰²ã‚Šå½“ã¦ã¯ã‚¢ã‚¯ã‚»ã‚¹ãŒç™ºç”Ÿã™ã‚‹ã‚¿ã‚¤ãƒŸãƒ³ã‚°ã¾ã§é…å»¶ã•ã›ã¾ã™ã€‚ã“ã‚Œã‚’é…å»¶ã‚¢ãƒã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã¨ã„ã„ã€ã ã„ãŸã„ã«ãŠã„ã¦ã†ã¾ãå‹•ãã¾ã™ã€‚ãŸã ã—å¿…ãšã†ã¾ãã„ãã¨ä¿è¨¼ã•ã‚Œã¦ã„ã‚‹ã‚ã‘ã§ã¯ãªã„ã®ã§ç ´ç¶»ã™ã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ OOM Killerã¯ã“ã®é…å»¶ã‚¢ãƒã‚±ãƒ¼ã‚·ãƒ§ãƒ³ãŒç ´ç¶»ã—ãã†ãªã¨ãã«ã€é©å½“ã«ãƒ—ãƒã‚»ã‚¹ã‚’
ori53 2016/02/22
Linux

kernel

oom

memory

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å°å´Ž è³‡åºƒ (KOSAKI Motohiro) @kosaki55tea . @sonots ã‹ã‚‰æ—¥æœ¬ã®Webç•Œéšˆã§ã¯TCP_TIMEWAIT_LEN ã‚’å¤‰æ›´ã—ã¦ã‚«ãƒ¼ãƒãƒ«ãƒªã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ãŒãƒ‡ãƒ•ã‚¡ã‚¯ãƒˆã¨ã„ã†è©±ã‚’èžã„ã¦è»½ãããã£ã¦ã¿ãŸã¨ã“ã‚ã€ãŸã—ã‹ã«å¤§é‡ã«ãã®ã‚ˆã†ãªãƒšãƒ¼ã‚¸ãŒãƒ’ãƒƒãƒˆã™ã‚‹ã€‚ã—ã‹ã‚‚ã©ã‚Œä¸€ã¤ã¨ã—ã¦ç†ç”±ãŒæ›¸ã„ã¦ãªã„ã€‚ãã—ã¦æ—¥æœ¬ç‰¹æœ‰ã®ç¾è±¡ 2015-09-09 00:03:14 å°å´Ž è³‡åºƒ (KOSAKI Motohiro) @kosaki55tea è»½ãã‚½ãƒ¼ã‚¹ã‚’è¦‹ãŸæ„Ÿã˜ã ã¨ã€tcp_tw_reuse ã‚’ã‚»ãƒƒãƒˆã™ã‚‹ã¨ï¼‘ç§’ã§ TIME_WAITã®socketã¯å†åˆ©ç”¨ãŒå§‹ã¾ã‚‹ã®ã§ã€ã„ã¾ã²ã¨ã¤ãƒªã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã®å¿…è¦æ€§ãŒåˆ†ã‹ã‚‰ãšã€‚ã“ã‚Œã€ã‚½ãƒ¼ã‚¹å‘¼ã‚“ã§å¦¥å½“æ€§ãƒã‚§ãƒƒã‚¯ã—ãŸäººãŒã„ã‚‹ãƒŽã‚¦ãƒã‚¦ãªã®ã‹ãªã‚ 2015-09-09 00:04:39
ori53 2015/10/02
linux

netstat

tcp
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ori53 2015/09/14
Linux

memory
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Linux ã®ãƒ—ãƒã‚»ã‚¹ãŒ Copy on Write ã§å…±æœ‰ã—ã¦ã„ã‚‹ãƒ¡ãƒ¢ãƒªã®ã‚µã‚¤ã‚ºã‚’èª¿ã¹ã‚‹
Linux ã¯ fork ã§åãƒ—ãƒã‚»ã‚¹ã‚’ä½œæˆã—ãŸå ´åˆã€è¦ªã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªç©ºé–“ã®å†…å®¹ã‚’åã¸ã‚³ãƒ”ãƒ¼ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ã—ã‹ã—ã¾ã¨ã‚‚ã«å…¨ç©ºé–“ã‚’ã‚³ãƒ”ãƒ¼ã—ã¦ã„ãŸã®ã§ã¯ fork ã®ã‚³ã‚¹ãƒˆãŒé«˜ããªã£ã¦ã—ã¾ã„ã¾ã™ã—ã€åãŒè¦ªã¨åŒã˜ã‚ˆã†ãªãƒ—ãƒã‚»ã‚¹ã¨ã—ã¦å‹•ä½œã—ç¶šã‘ã‚‹å ´åˆã¯ã€å†…å®¹ã®é‡è¤‡ã—ãŸãƒšãƒ¼ã‚¸ãŒå¤šæ•°ã§ãã¦ã—ã¾ã„ã€åŠ¹çŽ‡ãŒã‚ˆãã‚ã‚Šã¾ã›ã‚“ã€‚ ãã“ã§ã€Linux ã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªã¯ã€ãƒ¡ãƒ¢ãƒªç©ºé–“ã‚’èˆã‚ã¦ã‚³ãƒ”ãƒ¼ã™ã‚‹ã®ã§ã¯ãªãã€ã¯ã˜ã‚ã¯è¦ªåã§ãƒ¡ãƒ¢ãƒªé ˜åŸŸã‚’å…±æœ‰ã—ã¦ãŠã„ã¦ã€æ›¸ãè¾¼ã¿ãŒã‚ã£ãŸæ™‚ç‚¹ã§ã€ãã®æ›¸ãè¾¼ã¿ã®ã‚ã£ãŸãƒšãƒ¼ã‚¸ã ã‘ã‚’è¦ªåã§å€‹åˆ¥ã«æŒã¤ã¨ã„ã†ä»•çµ„ã¿ã§ã“ã®å•é¡Œã‚’å›žé¿ã—ã¾ã™ã€‚Copy-On-Write (CoW) ã¨å‘¼ã°ã‚Œã‚‹æˆ¦ç•¥ã§ã™ã€‚å…±æœ‰ãƒ¡ãƒ¢ãƒªãƒšãƒ¼ã‚¸ã¯ã€è¦ªåãã‚Œãžã‚Œã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªç©ºé–“ã‚’åŒä¸€ã®ç‰©ç†ãƒ¡ãƒ¢ãƒªã«ãƒžãƒƒãƒ”ãƒ³ã‚°ã™ã‚‹ã“ã¨ã§å®Ÿç¾ã•ã‚Œã¾ã™ã€‚ã‚ˆã‚Šè©³ã—ãã¯ ã‚³ãƒ”ãƒ¼ã‚ªãƒ³ãƒ©ã‚¤ãƒˆ - Wikipedia ãªã©ã‚’å‚ç…§ã—ã¦ãã ã•ã„ã€‚ ã“ã® CoW ã«
ori53 2015/09/02
linux

kernel

performance

memory
ãƒªãƒ³ã‚¯
ç›¸æ‰‹ãŒã„ãªã„ã®ã« ESTABLISHED ã«ãªã£ã¦ã‚‹ TCP ãƒãƒ¼ãƒˆ - tmtms ã®ãƒ¡ãƒ¢
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ori53 2015/06/09
Linux

tcp
ãƒªãƒ³ã‚¯
Linuxã§ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã‚„ã‚ãƒ£ãƒƒã‚·ãƒ¥ã‚µãƒ¼ãƒã‚’ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã•ã›ã‚‹ãŸã‚ã®ã‚«ãƒ¼ãƒãƒ«ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚° - ã‚†ã†ã†ããƒ–ãƒã‚°
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ori53 2015/03/31
linux

kernel

network
ãƒªãƒ³ã‚¯
Linux Profiling at Netflix
This talk discusses Linux profiling using perf_events (also called "perf") based on Netflix's use of it. It covers how to use perf to get CPU profiling working and overcome common issues. The speaker will give a tour of perf_events features and show how Netflix uses it to analyze performance across their massive Amazon EC2 Linux cloud. They rely on tools like perf for customer satisfaction, cost o
ori53 2015/03/11
linux

performance
ãƒªãƒ³ã‚¯
TumblrãŒãƒ‡ãƒ¼ã‚¿ã‚»ãƒ³ã‚¿è‡ªå‹•åŒ–ãƒ„ãƒ¼ãƒ«Genesisã‚’ãƒªãƒªãƒ¼ã‚¹
Spring Bootã«ã‚ˆã‚‹APIãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰æ§‹ç¯‰å®Ÿè·µã‚¬ã‚¤ãƒ‰ ç¬¬2ç‰ˆ ä½•åƒäººã‚‚ã®é–‹ç™ºè€…ãŒã€InfoQã®ãƒŸãƒ‹ãƒ–ãƒƒã‚¯ã€ŒPractical Guide to Building an API Back End with Spring Bootã€ã‹ã‚‰ã€Spring Bootã‚’ä½¿ã£ãŸREST APIæ§‹ç¯‰ã®åŸºç¤Žã‚’å¦ã‚“ã ã€‚ã“ã®æœ¬ã§ã¯ã€å‡ºç‰ˆæ™‚ã«æ–°ã—ããƒªãƒªãƒ¼ã‚¹ã•ã‚ŒãŸãƒãƒ¼ã‚¸ãƒ§ãƒ³ã§ã‚ã‚‹ Spring Boot 2 ã‚’ä½¿ç”¨ã—ã¦ã„ã‚‹ã€‚ã—ã‹ã—ã€Spring Boot3ãŒæœ€è¿‘ãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã€é‡è¦ãªå¤‰...
ori53 2015/02/24
tumblr

linux

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2015å¹´2æœˆ17æ—¥ã€€ã„ã‚ˆã„ã‚ˆã‚«ãƒ¼ãƒãƒ«ã«ãƒ©ã‚¤ãƒ–ãƒ‘ãƒƒãƒæ©Ÿèƒ½ãŒï¼ï¼Ÿ Red Hatã¨SUSEãŒå…±åŒã§ãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆé–‹å§‹ï¼šLinux Daily Topicsï½œgihyo.jp â€¦ æŠ€è¡“è©•è«–ç¤¾
Linux Daily Topics 2015å¹´2æœˆ17æ—¥ã„ã‚ˆã„ã‚ˆã‚«ãƒ¼ãƒãƒ«ã«ãƒ©ã‚¤ãƒ–ãƒ‘ãƒƒãƒæ©Ÿèƒ½ãŒï¼ï¼Ÿ Red Hatã¨SUSEãŒå…±åŒã§ãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆé–‹å§‹ Linuxã§ã¯ã‚«ãƒ¼ãƒãƒ«ã«å¯¾ã—ã¦ãƒ‘ãƒƒãƒã‚’å½“ã¦ã‚‹éš›ã€OSã®å†èµ·å‹•ã€ã¤ã¾ã‚Šãƒ€ã‚¦ãƒ³ã‚¿ã‚¤ãƒ ãŒç™ºç”Ÿã™ã‚‹ã“ã¨ã¯åŸºæœ¬çš„ã«é¿ã‘ã‚‰ã‚Œãªã„ã€‚ã“ã®ãƒ‘ãƒƒãƒå½“ã¦ã¨ãã‚Œã«ä¼´ã†ãƒ€ã‚¦ãƒ³ã‚¿ã‚¤ãƒ ã®ç™ºç”Ÿã¯é‹ç”¨ç®¡ç†è€…ã«ã¨ã£ã¦ã¯å®Ÿã«é ãŒç—›ã„å•é¡Œãªã®ã ãŒã€ã“ã‚Œã‚’å›žé¿ã™ã‚‹ãŸã‚ã®ã‚½ãƒªãƒ¥ãƒ¼ã‚·ãƒ§ãƒ³ã¨ã—ã¦ã€Oracleã€Red Hatã€SUSEã®3ç¤¾ã¯ãã‚Œãžã‚Œç‹¬è‡ªã«ãƒ©ã‚¤ãƒ–ãƒ‘ãƒƒãƒæ©Ÿèƒ½ã®é–‹ç™ºã‚’ç¶šã‘ã¦ããŸã€‚ ãªã‹ã§ã‚‚æœ‰åãªã®ã¯Oracleã®ã€ŒKspliceã€ã ã‚ã†ã€‚Oracleã¯2011å¹´7æœˆã€ã‚¼ãƒãƒ€ã‚¦ãƒ³ã‚¿ã‚¤ãƒ ã§ã®ã‚«ãƒ¼ãƒãƒ«ãƒ‘ãƒƒãƒé©ç”¨ã‚’å®Ÿç¾ã™ã‚‹æŠ€è¡“ã‚’ã‚‚ã¤Kspliceç¤¾ã‚’è²·åŽã—ãŸã€‚Kspliceã®ã‚³ãƒ¼ãƒ‰è‡ªä½“ã¯ã‚ªãƒ¼ãƒ—ãƒ³ã‚½ãƒ¼ã‚¹ï¼ˆGPLv2ï¼‰ã¨ã—ã¦å…¬é–‹ã•ã‚Œã¦ã„ã‚‹ã‚‚ã®ã®ã€è²·åŽæ™‚ã¾ã§ã‚µãƒãƒ¼ãƒˆã¯Kspliceç¤¾ãŒè¡Œã£
ori53 2015/02/23
linux

kernel
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OSTree: OSã‚¤ãƒ¡ãƒ¼ã‚¸ã¨ãƒ‘ãƒƒã‚±ãƒ¼ã‚¸ã‚·ã‚¹ãƒ†ãƒ ã®é–“ã«Gitã®ã‚¢ãƒ—ãƒãƒ¼ãƒã‚’
This document discusses OSTree, a system for deploying and managing operating system updates using Git-like techno logies. It describes how OSTree works with Linux distributions and containers to provide atomic operating system updates using techno logies like Git, Docker, and chroot. OSTree aims to provide fast, reliable operating system updates similar to techno logies used in Chrome OS and CoreOS.
ori53 2015/02/18
linux

ostree

git
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ori53 2015/02/12
linux

io
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ori53 2014/12/09
linux

network

namespace
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ori53 2014/10/14
kernel

linux
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ori53 2014/06/16
linux
ãƒªãƒ³ã‚¯
Charming Python: Functional programming in Python, Part 3
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
ori53 2014/06/06
linux

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ori53 2014/06/03
delayed block allocation

linux

kernel

ext4
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ori53 2014/05/27
linux

container
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ori53 2014/05/26
linux

tcp
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ori53 2014/05/24
linux

Docker
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Linux container update
2. Who am I â€¢ Linux ãƒ¡ãƒ¢ãƒªç®¡ç†ã‚³ã‚¢é–‹ç™ºè€… â€¢ MM Summit(ä¸Šä½20äººã®ã‚³ã‚¢é–‹ç™ºè€…ä¼šè°ï¼‰ï¼• å¹´é€£ç¶šæ‹›å¾… â€¢ Ruby core committer â€¢ ã‚³ãƒŸãƒƒãƒˆçŽ‡TOP10ã‚³ãƒŸãƒƒã‚¿ã®ã†ã¡ã®ä¸€äºº â€¢ ãƒœã‚¹ãƒˆãƒ³åœ¨ä½ã€Red Hatå¸¸é§ â€¢ Herokuã¯ä½¿ã£ãŸã“ã¨ãŒã‚ã‚Šã¾ã›ã‚“ 4. What is Container â€¢ ã‚€ã¤ã‹ã—ã„è¨€ã„æ–¹ã‚’ã™ã‚‹ã¨ Operating systemâ€“ level virtualization â€¢ FreeBSD jail ãŒåš†çŸ¢ â€¢ Containerã¨ã„ã†ç”¨èªžã‚’æœ€åˆã«ä½¿ã„å§‹ã‚ãŸã® ã¯Solaris â€¢ ãƒªã‚½ãƒ¼ã‚¹(CPU, memory, IO, etc)ã®åˆ†é›¢ + åå‰ ç©ºé–“(pid, IP adress, chroot)ã®åˆ†é›¢ + (SELinux) â€¢ ã“ã“äºŒå¹´ãã‚‰ã„ã§æ€¥é€Ÿã«æ³¨ç›®åº¦ã‚¢ãƒƒãƒ— 5. Linux v2.6.32 â€¢ 20
ori53 2014/05/23
linux

kernel
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