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gouei2001 2021/11/23
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gouei2001 2018/08/20
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gouei2001 2017/03/22
linux

kernel

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performance

setting

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man

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linuxãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚° (netstatã«ã‚ˆã‚‹nwã®èª¿æŸ») - end0tknr's kipple - webå†™çµŒé–‹ç™º
web+db press no.34 ã«å‚è€ƒã«ãªã‚‹è¨˜äº‹ãŒè¨˜è¼‰ã•ã‚Œã¦ã„ãŸã®ã§ã€ä»Šå›žã¯lanå†…ã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã‚’è©¦ã—ã¦ã¿ã¾ã™ã€‚ netstat -e ã«ã‚ˆã‚‹ ã‚¤ãƒ³ã‚¿ãƒ•ã‚§ãƒ¼ã‚¹æ¯Žã®ç¢ºèª lanã®å ´åˆã€netstat -e ã§ nicæ¯Žã®é€šä¿¡é‡ã¨ã‚¨ãƒ©ãƒ¼ã‚’ç¢ºèªã™ã‚‹ãã†ã§ã™ã€‚ ç§ã®colinuxç’°å¢ƒã§ã“ã‚Œã‚’å®Ÿè¡Œã™ã‚‹ã¨ã€æ¬¡ã®ã‚ˆã†ã«è¡¨ç¤ºã•ã‚Œã¾ã—ãŸã€‚ [colinux ~]$ netstat -e -Ieth0 30 Kernel Interface table eth0 Link encap:Ethernet HWaddr 00:FF:33:C4:DC:00 inet addr:192.168.0.5 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::2ff:33ff:fec4:dc00/64 Scope:Link UP BROADCAST RU
gouei2001 2017/03/19
Active

ab

apache

db

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linux

network

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tuning

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Oracle Database 11g ã‚’é‹ç”¨ã—ã¦ã„ã‚‹ã‚µãƒ¼ãƒã® messegs ã‚’è¦‹ã‚‹ã¨ä»¥ä¸‹ã®ã‚ˆã† ãªã‚¢ãƒ©ãƒ¼ãƒˆãŒæ–ç¶šçš„ã«å‡ºåŠ›ã—ã¦ã„ã‚‹ã€‚ kernel: EXT4-fs warning (device sda0): ext4_dx_add_entry: Directory index full! å†…å®¹ã‚’ç¢ºèªã™ã‚‹ã¨ inode ã‚’ãŸãã•ã‚“ä½¿ç”¨ã—ã¦ã„ã¾ã™ã‚ˆã€ã¨ã„ã†ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã‚‰ã—ã„ã€‚ inode ã¯ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ä¸Šã§ãƒ•ã‚¡ã‚¤ãƒ«ã‚„ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã‚’ç®¡ç†ã™ã‚‹ç‚ºã«ä½¿ç”¨ ã™ã‚‹ã‚‚ã®ã‚‰ã—ã„ã€‚ ãªã®ã§ã€ãƒ•ã‚¡ã‚¤ãƒ«ãŒãŸãã•ã‚“ã‚ã‚Šãã†ãªãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã‚’æŽ¢ã—ã¦ã¿ã‚‹ã€‚ ã“ã®ãƒšãƒ¼ã‚¸ã®ã‚³ãƒžãƒ³ãƒ‰ã‚’ä½¿ã£ã¦ç¢ºèªï¼ˆã“ã®ãƒ¯ãƒ³ãƒ©ã‚¤ãƒŠãƒ¼ã¡ã‚‡ãƒ¼ä¾¿åˆ©ï¼‰ for dir in `ll|grep ^d|grep -v "\./"|awk '{print $9}'`; do echo `find ./$dir -true|wc -l` `pwd`/$di
gouei2001 2016/10/27
[EXT4-fs warning] [ext4_dx_add_entry] [Directory index full!]

kernel
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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‚’
gouei2001 2016/10/03
access

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å…ˆæ—¥ã®ã“ã®è©± ã€Out Of Memory Killer ã€é€šç§°OOM Killerã®ã›ã„ã‚‰ã—ã„ã€‚ã‚ãƒ£ãƒƒã‚·ãƒ¥ã¨ã—ã¦shared memoryã‚’è´…æ²¢ã«(^^;)ä½¿ç”¨ã™ã‚‹PostgresSQLã®Write processãŒé›†ä¸çš„ã«ç‹™ã‚ã‚Œã¦ã¾ã™>_<ã€‚ ç›´æŽ¥çš„ã«ã“ã®ä»•çµ„ã¿ã‚’åˆ‡ã‚‹ã«ã¯echo 0 > /proc/sys/vm/oom-kill ã‹echo -17 > /proc/(PID)/oom_adj ãŸã ã—å‰è€…ã¯RedHatç‹¬è‡ª&OOM Killerå®Œå…¨åœæ¢ã€å¾Œè€…ã¯ã‚«ãƒ¼ãƒãƒ«2.6.11ä»¥é™&ãƒ—ãƒã‚»ã‚¹ã”ã¨ã«è¨å®šã€‚CentOS 4.4ã®ã‚«ãƒ¼ãƒãƒ«ã¯ç¾æ™‚ç‚¹2.6.9ãªã®ã§å‰è€…ã€‚ã‚‚ã†ã²ã¨ã¤ã®æ–¹æ³•ã¨ã—ã¦ã€OOM KillerãŒç™ºå‹•ã™ã‚‹ï¼‘ã¤ã®åŽŸå› ã‚’ä½œã£ã¦ã„ã‚‹ãƒ¡ãƒ¢ãƒªã®ã‚ªãƒ¼ãƒãƒ¼ã‚³ãƒŸãƒƒãƒˆã‚’ã•ã›ãªã„æ–¹æ³•ã€‚å…·ä½“çš„ã«ã¯ã€ echo 2 > /proc/sys/vm/overcommit_memory echo 90
gouei2001 2016/10/03
.net

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centos

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gouei2001 2016/09/28
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IPv4 è»¢é€ã®å®Ÿè¡Œå¯å¦ã‚’æ±ºå®šã™ã‚‹ "net.ipv4.ip_forward" ã‚’æ¤œè¨¼ã™ã‚‹ - ãˆã“æ—¥è¨˜
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gouei2001 2016/07/19
Linux

ip_forward

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IPv4

ã‚µãƒ¼ãƒ

unclassified

ubuntu

kernel

ip

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gouei2001 2016/05/04
â€œexport KERN_DIR=`ls -t /usr/src/kernels/|head -1`â€

devel

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virtualbox

CentOS7

kernel

VirtualBox

sudo

RPM

yum

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Vagrantã‚¨ãƒ©ãƒ¼ã‚ã‚Œã“ã‚Œã«é–¢ã™ã‚‹å¯¾å‡¦æ³• - Qiita
ã¯ã˜ã‚ã« Vagrantã§ã®é–‹ç™ºç’°å¢ƒä½œã‚Šã§å¯¾å‡¦ã—ãŸã‚¨ãƒ©ãƒ¼ã‚ã‚Œã“ã‚Œã«ã¤ã„ã¦æ›¸ãã¾ã™ã€‚ã“ã®å‰æ›¸ã„ãŸè¨˜äº‹ã‚‚æ›¸ããªãŠã•ãªãã¡ã‚ƒã‹ãªã€‚ã€‚ã€‚ åŸºæœ¬çš„ã«ã€ãƒ›ã‚¹ãƒˆãƒžã‚·ãƒ³æ™‚ã®æ“ä½œãŒzshã§ã€ä»®æƒ³ãƒžã‚·ãƒ³æ™‚ã®æ“ä½œãŒbashã§ã™ã€‚ ã‚„ã£ãŸæ‰‹é †é€šã‚Šã«æ›¸ã„ãŸã¤ã‚‚ã‚Šã ã‘ã©ã€è‰²ã€…è©¦ã—ãŸå¾Œã«æ›¸ã„ãŸã‹ã‚‰ã€ã‚‚ã—ã‹ã—ãŸã‚‰é–“é•ãˆã¦ã‚‹ã‹ã‚‚ã€‚ã€‚ã€‚ æœ€åˆã®ã‚¨ãƒ©ãƒ¼ vagrant upæ™‚ $ vagrant reload ==> default: Attempting graceful shutdown of VM... ==> default: Checking if box 'chef/centos-6.5' is up to date... ==> default: There was a probl em while downloading the metadata for your box ==> default: to chec
gouei2001 2016/05/04
box

ANY

vagrant

VirtualBox

kernel

Adapter

machine

ssh

network

log
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http://www.oss-d.net/bind/9.7/slave
gouei2001 2016/02/22
DNS

bind

centos

ã‚µãƒ¼ãƒ

BIND

CentOS

kernel

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ãœã‚“ã¶TIME_WAITã®ã›ã„ã ï¼ - Qiita
èª²é¡Œ çªç„¶ã‚ãƒ£ãƒ³ãƒšãƒ¼ãƒ³ã¨ã‹ã®é«˜ãƒˆãƒ©ãƒ•ã‚£ãƒƒã‚¯ãŒæ¥ã‚‹ï¼ã¨ã‹è¨€ã‚ã‚Œã‚‹ã¨è‰²ã€…å›°ã‚‹ã“ã¨ã¯ã‚ã‚‹ã‚‚ã®ã®ã€ä»Šã®ã”æ™‚ä¸–ã‚¯ãƒ©ã‚¦ãƒ‰ã ã‹ã‚‰ã‚¹ãƒšãƒƒã‚¯ä¸Šã’ã¨ãã‚ƒãªã‚“ã¨ã‹ãªã‚‹ã§ã—ã‚‡ã€‚ã£ã¦ã¨ã‚Šã‚ãˆãšCPUã¨ã‹ãƒ¡ãƒ¢ãƒªã‚ã’ã¦è¦‹ãŸã‚‚ã®ã®ã€ã‚ãƒ£ãƒ³ãƒšãƒ¼ãƒ³ãŒå§‹ã¾ã£ãŸã‚‰æ„å¤–ã¨æ—©ããƒ–ãƒ©ã‚¦ã‚¶ã‹ã‚‰ã¤ãªãŒã‚‰ãªã„ï¼ï¼ã¨ã‹è¨€ã‚ã‚ŒãŸã‚Šã™ã‚‹ã€‚ CPUã‚‚ãƒ¡ãƒ¢ãƒªã‚‚ãã‚“ãªã«è² è·ã¯ç‰¹ã«é«˜ãã‚‚ãªã„ã€‚èª¿ã¹ã¦ã¿ãŸã‚‰TIME_WAITãŒå¤§é‡ã«ã‚ã£ãŸã€‚ ã¨ã‚Šã‚ãˆãšä½•ã¨ã‹ã—ãŸã„ TIME_WAITæ•°ã‚’ã‚³ãƒžãƒ³ãƒ‰ã§ç¢ºèª $ netstat -anp|grep TIME_WAIT __(snip)__ tcp 0 0 192.168.1.1:80 192.97.67.192:56305 TIME_WAIT - tcp 0 0 192.168.1.1:80 192.63.64.145:65274 TIME_WAIT - tcp 0 0 192.168.1.1:80 192.39
gouei2001 2015/07/01
1.1

development

linux

network

TCP

netstat

tuning

server

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kernel
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CLOSE_WAITã®ã‚»ãƒƒã‚·ãƒ§ãƒ³ã‚’æ—©ãæ¶ˆã™æ–¹æ³• - ã¤ã‚Œã¥ã‚Œãªã‚‹ãƒ»ãƒ»ãƒ»
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gouei2001 2013/07/18
IPv4

linux

apache

network

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server

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