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linuxã«é–¢ã™ã‚‹nullpopopoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (15)

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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
nullpopopo 2016/01/02
mysql

ãƒ¡ãƒ¢ãƒª

ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°

linux
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Linux ã®ã‚ªãƒ¼ãƒãƒ¼ã‚³ãƒŸãƒƒãƒˆã«ã¤ã„ã¦èª¿ã¹ã¦ã¿ãŸ
Linux ã®ã‚ªãƒ¼ãƒãƒ¼ã‚³ãƒŸãƒƒãƒˆã®ã¯ãªã— ==================================== ï¼ˆã“ã‚Œã‚’æ›¸ã„ãŸã®ã¯ Linux 2.6.38 ã®ã¨ãï¼‰ Linux ã‚«ãƒ¼ãƒãƒ«ã¯å®Ÿãƒ¡ãƒ¢ãƒªä»¥ä¸Šã«ãƒ¡ãƒ¢ãƒªã‚’ãƒ—ãƒã‚»ã‚¹ã«å‰²ã‚Šå½“ã¦ã‚‹ã“ã¨ãŒã§ãã‚‹ ã“ã®ä»•çµ„ã¿ã‚’ã‚ªãƒ¼ãƒãƒ¼ã‚³ãƒŸãƒƒãƒˆ (over-commit) ã¨å‘¼ã¶ ã‚ªãƒ¼ãƒãƒ¼ã‚³ãƒŸãƒƒãƒˆã§ã¯ï¼Œã¨ã‚Šã‚ãˆãšãƒ¡ãƒ¢ãƒªã‚’ `malloc` ã•ã›ã¦ä»®ã®ã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’è¿”ã—ã¦ãŠãï¼Œ å®Ÿéš›ã«ä½¿ã‚ã‚Œã‚‹æ®µã«ãªã£ã¦ã¯ã˜ã‚ã¦å®Ÿãƒ¡ãƒ¢ãƒªã‚’ç¢ºä¿ã™ã‚‹ï¼Ž å®Ÿé¨“ --------- ãŸã `malloc` ã—ç¶šã‘ã‚‹ã ã‘ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ä½œã£ã¦å®Ÿé¨“ã—ã¦ã¿ã‚‹ï¼Ž ã“ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ãƒ¡ãƒ¢ãƒª 1 GB + ã‚¹ãƒ¯ãƒƒãƒ— 1 GB ã®ãƒ›ã‚¹ãƒˆã§å®Ÿè¡Œã—ã¦ã¿ã‚‹ã¨ï¼Œ $ free -t total used free shared buffers cached Mem: 1022404 82992 939412 0 4
nullpopopo 2016/01/02
linux

memory

ãƒ¡ãƒ¢ãƒª

oom

vm.opercommit_memory
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nullpopopo 2015/09/14
ã‚ã‚‚ã‚ã‚‚ã‚ã‚‚

linux

rhel

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nullpopopo 2015/04/28
ffmpeg

linux

å‹•ç”»

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Blog | ä¿ºçš„å‚™å¿˜éŒ² ã€œãªã‚“ã‹ã„ã‚ã„ã‚ã€œ
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nullpopopo 2015/04/03
Linux

TIPS

blog
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Linuxä¸Šã§ã‚·ã‚§ãƒ«ãŒå®Ÿè¡Œã•ã‚Œã‚‹ä»•çµ„ã¿ã‚’ï¼Œä½“ç³»çš„ã«ç†è§£ã—ã‚ˆã†ã€€ï¼ˆbash ä¸ç´šè€…ã¸ã®é“ï¼‰ - ä¸»ã«è¨€èªžã¨ã‚·ã‚¹ãƒ†ãƒ é–‹ç™ºã«é–¢ã—ã¦
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nullpopopo 2015/03/21
Linux

ã‚·ã‚§ãƒ«

bash
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Linuxã§NICã‚’å…¥ã‚Œæ›¿ãˆãŸã‚‰ã€udevã§å¼•ã£æŽ›ã‹ã£ãŸ: Once-in-a-Lifetime Chance
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nullpopopo 2015/03/16
linux

network

udev
ãƒªãƒ³ã‚¯
RHEL7/CentOS7ã§ipã‚³ãƒžãƒ³ãƒ‰ã‚’ãƒžã‚¹ã‚¿ãƒ¼ - ã‚ã‚‚ã‚ã‚‚
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nullpopopo 2015/02/16
rhel7

CentOS7

Linux

network
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nullpopopo 2015/02/08
RHEL

gfs

linux

centos

linux-ha
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nullpopopo 2015/02/04
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linux

SSL

SSLè¨¼æ˜Žæ›¸

web

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cURL - How To Use ï¼ˆãƒžãƒ‹ãƒ¥ã‚¢ãƒ«ãƒšãƒ¼ã‚¸æ—¥æœ¬èªžè¨³ï¼‰
This page is a Japanese translation of the manual page of the command line tool 'curl'. (more about this page) curl.1 man ãƒšãƒ¼ã‚¸ åå‰ curl - transfer a URL curl - URL è»¢é€ æ›¸å¼ curl [options] [URL...] èª¬æ˜Ž curl is a tool to transfer data from or to a server, using one of the supported protocols (HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, DICT, TELNET, LDAP or FILE). The command is designed to work without use
nullpopopo 2015/02/02
http

linux

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curl

reference
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Welcome to the RPM repository on rpmfind.net
Welcome to the RPM repository on fr2.rpmfind.net rpm2html automatically generates Web pages describing a set of RPM packages. The Rpmfind tool allows automate the search of packages from the RPM Database or maintain your system up-to-date in a more automated way. The goals of rpm2html are also to identify the dependencies between various packages and to find the package(s) providing the resources
nullpopopo 2015/01/31
linux

rpm

RPMæ¤œç´¢
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SysVinit to Systemd Cheatsheet - Fedora Project Wiki
This is a document to help system administrators who need to understand what commands in systemd replace their old workflow in sysvinit. If you want general information on systemd, refer to systemd. Note on 'service' and 'chkconfig' commands The 'service' and 'chkconfig' commands will mostly continue to work as expected in the systemd world, this guide is how to use the native systemctl replacemen
nullpopopo 2015/01/31
linux

systemd

sysvinit
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nullpopopo 2015/01/26
Linux

ã‚·ã‚§ãƒ«

shell

bash

shellscript

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expr

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RHEL7/CentOS7 NetworkManagerå¾¹åº•å…¥é–€
RHEL7/CentOS7ã®NetworkManagerã®åˆ©ç”¨æ–¹æ³•ã§ã™ã€‚ 2015/01/17 ver1.0 å…¬é–‹ 2015/01/18 ver1.1 ãƒ¬ã‚¤ã‚¢ã‚¦ãƒˆèª¿æ•´ã¨å‚è€ƒè³‡æ–™ï¼ˆBonding/VLAN/ãƒ–ãƒªãƒƒã‚¸ã®çµ„ã¿åˆã‚ã›ï¼‰è¿½åŠ 2015/01/21 ver1.2 ã‚‚ã‚ã‚‚ã‚èª¤æ¤ä¿®æ£ 2015/02/05 ver1.3 Teamãƒ‡ãƒã‚¤ã‚¹ã®çµµã‚’è¿½åŠ 2015/05/23 ver1.4 RHEL7.1ã«åˆã‚ã›ã¦ã‚³ãƒžãƒ³ãƒ‰ä¿®æ£Read less
nullpopopo 2015/01/19
Linux

CentOS7

network

NetworkManager

RHEL

rhel7

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