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本記事ã®å…¬é–‹å¾Œã®2016å¹´7月ã«ã¯ã¦ãªã«ãŠã‘ã‚‹ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°äº‹ä¾‹ã‚’紹介ã—ãŸã€‚ ã¯ã¦ãªã«ãŠã‘ã‚‹Linuxãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ãƒ‘フォーマンス改善 / Linux network performance improvement at hatena - Speaker Deck HAProxy ã‚„ nginx ãªã©ã®ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã‚„リãƒãƒ¼ã‚¹ãƒ—ãƒã‚ã‚·ã€memcached ãªã©ã® KVS ã®ã‚ˆã†ãªé«˜ãƒ‘ケットレートã«ãªã‚Šã‚„ã™ã„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¢ãƒ—リケーションã«ãŠã„ã¦ã€å˜ä¸€ã® CPU コアã«è² è·ãŒåã‚Šã€ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã—ãªã„ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ 今回ã¯ã€ã“ã®ã‚ˆã†ãªãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¢ãƒ—リケーションã«ãŠã„㦠CPU è² è·ãŒãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã—ãªã„ç†ç”±ã¨ã€ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã•ã›ã‚‹ãŸã‚ã® Linux カーãƒãƒ«ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°æ‰‹æ³•ã¨ã—㦠RFS (Receive Flow Steering) ã‚’
ã€Linux】/dev/random 㨠/dev/urandomã®é•ã„ - Man On a Mission
ã”ã‚ã‚“ãªã•ã„ã€ã“ã®è¨˜äº‹ã¯ç§ã«ã‚ˆã‚Šå‰Šé™¤ã•ã‚Œã¾ã—㟠2022/04/16 ãªã«ã‚„ら当記事ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹æ•°ãŒæ€¥ã«ä¼¸ã³ã¦ã¦ã€ãªãœã“ã‚“ãªåœ°å‘³è¨˜äº‹ãŒï¼Ÿã¨æ€ã£ã¦ãŸã‚‰ã€ã©ã†ã‚‚容é‡ç„¡åˆ¶é™ã‚¯ãƒ©ã‚¦ãƒ‰ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã‚µãƒ¼ãƒ“スã¸ã®å«ŒãŒã‚‰ã›ã‚’示唆ã™ã‚‹å‹•ããŒã‚ã‚Šã€ãã®æµã‚Œã§ã‚¢ã‚¯ã‚»ã‚¹ã•ã‚Œã¦ã‚‹ã‚ˆã†ã§ã™ã€‚ ãã†ã„ã†ã‚¢ã‚¯ã‚»ã‚¹ãŒã©ã®ãらã„ã®å‰²åˆãªã®ã‹ã‚‚ã€å®Ÿéš›ã«ãã®ã‚ˆã†ãªè¡Œç‚ºã«èµ°ã‚‹ã‹ã©ã†ã‹ã‚‚ã‚ã‹ã‚Šã¾ã›ã‚“ãŒã€å½“記事ãŒãれを幇助ã™ã‚‹ã‚ˆã†ãªå½¢ã«ãªã‚‹ã¨æ¥è…¹ãªã®ã§ã€ã„ã£ãŸã‚“内容を削除ã—ã¾ã—ãŸã€‚ 真é¢ç›®ãªç›®çš„ã§ãŸã©ã‚Šç€ã„ãŸæ–¹ã¯ã”ã‚ã‚“ãªã•ã„。ãŸã¶ã‚“åŒå†…容を扱ã£ãŸè¨˜äº‹ã¯ãƒãƒƒãƒˆã«ã‚ãµã‚Œã¦ã‚‹ã¨æ€ã†ã®ã§ã€ãã¡ã‚‰ã‚’ã”å‚ç…§ãã ã•ã„。 ã»ã¨ã¼ã‚ŠãŒå†·ã‚ãŸã‚‰æˆ»ã—ã¾ã™â€¦ã€‚ ãã‚Œã«ã—ã¦ã‚‚ã€æŽ’泄物ã®å称をã‚ã‚ã„ã¦å–œã¶å°å¦ç”Ÿã¿ãŸã„ãªè¡Œå‹•ã‚’å–られる方ãŒçµæ§‹ã„ã‚‹ã£ã½ã„ã“ã¨ã«æˆ¦æ…„ã—ã¦ã¾ã™ãŒã€ã¾ã‚ã€å¼·ã„å¹¼å…性をæŒã¤äººãŒåœ¨è·æ—¥æ•°æœ€é•·é¦–相ã ã£ãŸã‚Šã™ã‚‹å›½ã§ã™ã®ã§ã€æ•´åˆã—ã¦ã„ã‚‹ã¨ã¯ã„ãˆã‚‹ã®ã‹ãª
Getting information about a process' memory usage from /proc/pid/smaps
For a given process in /proc/<pid>/smaps, for a given mapping entry what are: Shared_Clean Shared_Dirty Private_Clean Private_Dirty Is Shared_Clean + Shared_Dirty the amount of memory that is shared with other processes? So it is like shared RSS? Similarly is Private_Clean + Private_Dirty the amount of memory that is available for only one process? So it is like private RSS? Is the PSS value = Pri
RHEL7/CentOS7ã®journaldã«ã¤ã„ã¦ã®ã‚‚ã‚ã‚‚ã‚ - ã‚ã‚‚ã‚ã‚‚
journaldã¨ã¯ï¼Ÿ systemdã®ç’°å¢ƒã§ã€æ¨™æº–çš„ã«æä¾›ã•ã‚Œã‚‹ãƒã‚°ç®¡ç†ã®ã‚µãƒ¼ãƒ“スã§ã™ã€‚æ£å¼å称ã¯ã€ä¸‹è¨˜ã®ã€Œsystemd-journald.serviceã€ã§ã™ã€‚ # systemctl status systemd-journald.service systemd-journald.service - Journal Service Loaded: loaded (/usr/lib/systemd/system/systemd-journald.service; static) Active: active (running) since 月 2014-11-24 16:27:08 JST; 5 days ago Docs: man:systemd-journald.service(8) man:journald.conf(5) Main PID: 334 (systemd-jour
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ip コマンドã¯ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯è¨å®šã‚³ãƒžãƒ³ãƒ‰ã®ã‚¹ã‚¿ãƒ³ãƒ€ãƒ¼ãƒ‰ã€‚システムã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ‘ラメータを表示ã—ãŸã‚Šè¨å®šã™ã‚‹ã‚³ãƒžãƒ³ãƒ‰ã 。 Linux ã§ã¯åºƒã使ã‚ã‚Œã¦ã„㟠ifconfig ãŒéžæŽ¨å¥¨ã¨ãªã‚Šå¤šãã®ãƒ‡ã‚£ã‚¹ãƒˆãƒªãƒ“ューションã§æŽ’除ã•ã‚Œã¤ã¤ã‚る。 ip コマンドã¸ã®ç§»è¡ŒãŒæŽ¨å¥¨ã•ã‚Œã¦ã„る。 IPROUTE コマンドã¯å¤šãã®æƒ…å ±ã‚’å«ã‚“ã§ã„ã‚‹ã«ã‚‚ã‹ã‹ã‚らãšã€ã»ã¨ã‚“ã©ä¸èº«ãŒã‚ã‹ã‚‰ãªã‹ã£ãŸã®ã§èª¿ã¹ã¦ã¿ã‚‹ã“ã¨ã«ã—ãŸã€‚ システムã®ã™ã¹ã¦ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚’表示ã•ã›ã‚‹ $ ip addr $ ip a 上記ã®2ã¤ã®ã‚³ãƒžãƒ³ãƒ‰ã¯ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ‡ãƒã‚¤ã‚¹ã® IPアドレスã¨ãƒ—ãƒãƒ‘ティを表示ã•ã›ã‚‹ã‚³ãƒžãƒ³ãƒ‰ã§ã‚ã‚Šã€å‡ºåŠ›çµæžœã¯åŒã˜ã 。 オブジェクトaddr （address ã®ç•¥ï¼‰ã®ä»£ã‚ã‚Šã« a ã ã‘ã§ã‚‚表示ã•ã›ã‚‹ã“ã¨ãŒã§ãる。 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue
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技術/UNIX/ãªãœnohupã‚’ãƒãƒƒã‚¯ã‚°ãƒ©ãƒ³ãƒ‰ã‚¸ãƒ§ãƒ–ã¨ã—ã¦èµ·å‹•ã™ã‚‹ã®ãŒå®šç•ªãªã®ã‹ï¼Ÿ(擬似端末, Pseudo Terminal, SIGHUPä»–) - Glamenv-Septzen.net
ホーム検索 - ãƒã‚°ã‚¤ãƒ³ | |  ヘルプ 技術/UNIX/ãªãœnohupã‚’ãƒãƒƒã‚¯ã‚°ãƒ©ãƒ³ãƒ‰ã‚¸ãƒ§ãƒ–ã¨ã—ã¦èµ·å‹•ã™ã‚‹ã®ãŒå®šç•ªãªã®ã‹ï¼Ÿ(擬似端末, Pseudo Terminal, SIGHUPä»–) [ Prev ] [ Next ] [ 技術 ] 何をã„ã¾ã•ã‚‰å½“ãŸã‚Šå‰ã®äº‹ã‚’・・・ã¨æ€ã‚れるã ã‚ã†ã€‚ $ nohup long_run_batch.sh & SSHã‹ã‚‰ãƒã‚°ã‚¢ã‚¦ãƒˆå¾Œã‚‚実行を続ã‘ãŸã„ãƒãƒƒãƒã‚¸ãƒ§ãƒ–ã‚’ã€"&"を付ã‘ã¦ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ã‚¸ãƒ§ãƒ–ã¨ã—ã¦nohupã‹ã‚‰èµ·å‹•ã™ã‚‹ã®ã¯å®šç•ªä¸ã®å®šç•ªã§ã‚る。 ã—ã‹ã—ã€ã€Œnohupを使ã‚ãªãã¦ã‚‚実行を続ã‘ã‚‹ã“ã¨ãŒå‡ºæ¥ã‚‹ã€ã‚„ã‚Šæ–¹ãŒã‚ã£ãŸã‚Šã€ã•ã‚‰ã«ã¯ã€Œnohupを付ã‘ã¦ã‚‚ãƒã‚°ã‚¢ã‚¦ãƒˆæ™‚ã«çµ‚了ã—ã¦ã—ã¾ã†ã€ãƒ‘ターンãŒã‚ã‚‹ã¨ã—ãŸã‚‰ã©ã†ã ã‚ã†ï¼Ÿ ãã—ã¦ã€ã‚ã‚‹æ—¥ã‚ãªãŸã®å¾Œè¼©ã‚„åŒåƒšãŒã“れらã«ã¤ã„ã¦ã‚ãªãŸã«è³ªå•ã—ã¦ããŸã‚‰ã€ã‚ãªãŸã¯ã©ã†ç”ãˆã‚‹ã ã‚ã†ã‹ï¼Ÿ 「Web上ã§æ¤œç´¢ã—ãŸã‚‰è¦‹ã¤ã‹
10.6. Creating and Modifying systemd Unit Files Red Hat Enterprise Linux 7 | Red Hat Customer Portal
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malloc ライブラリã®ãƒ¡ãƒ¢ãƒªç®¡ç†æ§‹é€ | 技術文書 | æŠ€è¡“æƒ…å ± | VA Linux Systems Japanæ ªå¼ä¼šç¤¾
Linux プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªž malloc(3)ã®ãƒ¡ãƒ¢ãƒªç®¡ç†æ§‹é€ 2007/11/30 技術本部 クラウド基盤エã‚スパート 　角馬 文彦 malloc()ã¨ã„ãˆã°ï¼£è¨€èªžã§ã¯ãŠé¦´æŸ“ã¿ã®ãƒ©ã‚¤ãƒ–ラリã§ã€æœ€ã‚‚良ã使用ã•ã‚Œã‚‹ãƒ©ã‚¤ãƒ–ラリã®ä¸€ã¤ã§ã™ã€‚ã—ã‹ã—ãã®åˆ†ã ã‘何らã‹ã®ä¸å…·åˆã‚’経験ã—ãŸäººã‚‚多ã„ã®ã§ã¯ãªã„ã§ã—ょã†ã‹ã€‚本書ã§ã¯malloc()ã€free()ã§ç¢ºä¿ã€è§£æ”¾ã•ã‚Œã‚‹ãƒ¡ãƒ¢ãƒªãƒªã‚½ãƒ¼ã‚¹ãŒå†…部的ã«ã©ã®ã‚ˆã†ã«ç®¡ç†ã•ã‚Œã¦ã„ã‚‹ã‹ã‚’説明ã—ã¦ã„ãã¾ã™ã€‚mallocライブラリã®ä»•æ§˜ã‚’ç†è§£ã™ã‚‹äº‹ã§ã€ãƒ©ã‚¤ãƒ–ラリ使用時ã«ä½•ã‚‰ã‹ã®ä¸å…·åˆãŒç™ºç”Ÿã—ãŸéš›ã®æ‰‹åŠ©ã‘ã«ãªã‚Œã°ã¨æ€ã„ã¾ã™ã€‚ ã“ã“ã§ã¯Linuxディストリビューションã§æ¨™æº–çš„ã«ä½¿ç”¨ã•ã‚Œã¦ã„ã‚‹glibcã®mallocライブラリを扱ã„ã¾ã™ã€‚今回ã®èª¿æŸ»ã§ã¯æ¬¡ã®ç’°å¢ƒã‚’使用ã—ã¦ã„ã¾ã™ã€‚ ディストリビューション :Debian sarge パッケージãƒãƒ¼ã‚¸ãƒ§ãƒ³ :glibc-2.3.
In defence of swap: common misconceptions
This post is also available in Japanese, Chinese, and Russian. tl;dr: Having swap is a reasonably important part of a well functioning system. Without it, sane memory management becomes harder to achieve.Swap is not generally about getting emergency memory, it's about making memory reclamation egalitarian and efficient. In fact, using it as "emergency memory" is generally actively harmful.Disablin
OOM_Killer - linux-mm.org Wiki
The functions, code excerpts and comments discussed below here are from mm/oom_kill.c unless otherwise noted. It is the job of the linux 'oom killer' to sacrifice one or more processes in order to free up memory for the system when all else fails. It will also kill any process sharing the same mm_struct as the selected process, for obvious reasons. Any particular process leader may be immunized ag
What Killed the Linux Desktop - Miguel de Icaza
True story. The hard disk that hosted my /home directory on my Linux machine failed so I had to replace it with a new one. Since this machine lives under my desk, I had to unplug all the cables, get it out, swap the hard drives and plug everything back again. Pretty standard stuff. Plug AC, plug keyboard, plug mouse but when I got to the speakers cable, I just skipped it. Why bother setting up the
Understand Linux Load Averages and Monitor Performance of Linux
Understand Linux Load Averages and Monitor Performance of Linux In this article, we will explain one of the critical Linux system administration tasks – performance monitoring in regards to system/CPU load and load averages. Before we move any further, let’s understand these two important phrases in all Unix-like systems: System load/CPU Load – is a measurement of CPU over or under-utilization in
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Linuxサーãƒãƒ¼ã®ãƒ‡ã‚£ã‚¹ãƒˆãƒªãƒ“ューションé¸ã³ – 月ã®è¦‹ãˆã‚‹å ´æ‰€ã§
GitHub - anbox/anbox: Anbox is a container-based approach to boot a full Android system on a regular GNU/Linux system
https://access.redhat.com/sites/default/files/attachments/rh_yum_cheatsheet_1214_jcs_print-1.pdf
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