{"id":947,"date":"2015-07-30T18:27:32","date_gmt":"2015-07-31T03:27:32","guid":{"rendered":"http:\/\/blog.box.kr\/?p=947"},"modified":"2015-07-30T18:27:32","modified_gmt":"2015-07-31T03:27:32","slug":"system-monitoring-command","status":"publish","type":"post","link":"https:\/\/blog.box.kr\/?p=947","title":{"rendered":"System Monitoring command"},"content":{"rendered":"

1. OS\/system<\/b><\/p>\n

\n

<\/b>$\u00a0vmstat 2 10 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u00a010 system resource status to every 2 sec.<\/p>\n

$ iostat 2 10 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ 10 I\/O status to every 2 sec.<\/p>\n

$\u00a0sar\u00a02 10 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ 10 ??? status to every 2 sec.<\/p>\n

$ ipcrm -m [Key]p 35020\u00a0 \/\/ \u00a0Remove Shared Memory<\/p>\n

$\u00a0netstat -n | grep EST | grep ‘:[PORT]’ | wc -l \u00a0\/\/ \u00a0count of connection list for port \u00a0(Web serverconnection count\u00a0, DB connection count, …)<\/p>\n

$\u00a0pstack [PID] \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\/\/ Process Stack Trace<\/p>\n

$ ipcs -qu \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u00a0list to\u00a0 message queue<\/p>\n

$ ipcs -mob | grep 35020 \/\/ \u00a0show to Shared Memory<\/p>\n

$ ipcrm -m [Key]p 35020\u00a0 \/\/ \u00a0Remove to Shared Memory<\/p>\n<\/div>\n


\n<\/span><\/b><\/p>\n

2. Java process\u00a0<\/b><\/p>\n

\n

$ $JAVA_HOME\/bin\/jstack [PID] \u00a0 \u00a0 \u00a0 \/\/\u00a0JVM Stack Trace\u00a0[\u00a0Hotspot JDK\u00a0] \u00a0( analysis to daed lock)<\/p>\n

$\u00a0<\/b>kill -3 [PID] \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ JVM Stack Trace & Heap Dump\u00a0[IBM JDK] \u00a0(analysis to \u00a0daed lock)<\/p>\n

$\u00a0jmap -dump:format=b,file=heap.hprof [pid] \u00a0\/\/ runtime heap dump\u00a0[\u00a0Hotspot JDK\u00a0]<\/p>\n

$ jstat -gc -h20 [PID] 3000 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ JVM Heap \uc0ac\uc6a9\ub7c9 \ubc0f\u00a0GC(garbage collection) \ud1b5\uacc4<\/span><\/p>\n

$\u00a0ps -mo pid,lwp,stime,time,pcpu\u00a0-C java | more \u00a0\/\/ java \ud504\ub85c\uc138\uc2a4\uc758 \uc4f0\ub808\ub4dc\ubcc4 CPU \uc0ac\uc6a9\ub7c9 \ud655\uc778<\/span><\/p>\n<\/div>\n

\u00a0*\u00a0<\/b>java thread dump \ubd84\uc11d\ud560\ub54c\ub294 \uc77c\uc815\uc8fc\uae30(5\ucd08) 10\ud68c\uc815\ub3c4 dump\ub97c \ud574\uc11c \ube44\uad50 \ubd84\uc11d\ud574\uc57c \ud55c\ub2e4.<\/b>\u00a0<\/b><\/p>\n

\u00a0* \ucc38\uace0 :\u00a0<\/b>http:\/\/architects.dzone.com\/articles\/how-analyze-java-thread-dumps<\/a><\/b><\/span><\/p>\n

3. Java Heap Dump \ubd84\uc11d \ud234 :\u00a0jstat, jmap, jhat, visualvm, jconsole, MemoryAnalyzer<\/b><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

1. OS\/system $\u00a0vmstat 2 10 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u00a010 system resource status to every 2 sec. $ iostat 2 10 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ 10 I\/O status to every 2 sec. $\u00a0sar\u00a02 10 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ 10 ??? status to every 2 sec. $ ipcrm -m [Key]p 35020\u00a0 \/\/ \u00a0Remove Shared Memory $\u00a0netstat -n | grep EST | grep ‘:[PORT]’ | wc -l \u00a0\/\/ \u00a0count of connection list for port \u00a0(Web serverconnection count\u00a0, DB connection count, …) $\u00a0pstack [PID] \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\/\/ Process Stack Trace $ ipcs -qu \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u00a0list to\u00a0 message queue $ ipcs -mob | grep 35020 \/\/ \u00a0show to Shared Memory $ ipcrm -m [Key]p 35020\u00a0 \/\/ \u00a0Remove to Shared Memory 2. Java process\u00a0 $ $JAVA_HOME\/bin\/jstack [PID] \u00a0 \u00a0 \u00a0 \/\/\u00a0JVM Stack Trace\u00a0[\u00a0Hotspot JDK\u00a0] \u00a0( analysis to daed lock) $\u00a0kill -3 [PID] \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ JVM […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"ngg_post_thumbnail":0,"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[4,5],"tags":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5q9Zn-fh","jetpack-related-posts":[{"id":750,"url":"https:\/\/blog.box.kr\/?p=750","url_meta":{"origin":947,"position":0},"title":"NGINX: SELinux Changes when Upgrading to RHEL 6.6 \/ CentOS 6.6","date":"2015-05-08","format":false,"excerpt":"If you upgrade a running system to Red Hat Enterprise Linux (RHEL) 6.6 or CentOS 6.6, the Security Enhanced Linux (SELinux) security permissions that apply to NGINX are\u00a0relabelled to a much stricter posture. 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You need to install the following packages (which are installed by default until and unless you removed it or skipped it while installing CentOS) openssh-clients : The OpenSSH client applications openssh-server : The\u2026","rel":"","context":"In "\uae30\uc220\uc790\ub8cc"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":675,"url":"https:\/\/blog.box.kr\/?p=675","url_meta":{"origin":947,"position":5},"title":"[Linux] CentOS 7 \/ RHEL 7\uc5d0 redis \uc124\uce58 \ud558\uae30","date":"2015-04-13","format":false,"excerpt":"Project URL : http:\/\/redis.io\/ CentOS 7 and Red Hat Enterprise Linux 7\uc5d0\uc11c Redis\ub97c \uc124\uce58 \ud558\ub294 \ubc29\ubc95 EPEL \uc800\uc7a5\uc18c \ub4f1\ub85d \ud558\uae30 EPEL \uc800\uc7a5\uc18c\ub97c \uba3c\uc800 \ub4f1\ub85d\ud55c\ub2e4. wget -r --no-parent -A 'epel-release-*.rpm' http:\/\/dl.fedoraproject.org\/pub\/epel\/7\/x86_64\/e\/ rpm -Uvh dl.fedoraproject.org\/pub\/epel\/7\/x86_64\/e\/epel-release-*.rpm \/etc\/yum.repos.d\u00a0 \ud558\uc704 \ub514\ub809\ud1a0\ub9ac\uc5d0 \uc544\ub798\uc640 \uac19\uc774 2\uac1c\uc758 epel \uc800\uc7a5\uc18c\uac00 \ub4f1\ub85d\ub41c\ub2e4. 1. epel.repo 2.epel-testing.repo [root@localhost ~]# ls -l \/etc\/yum.repos.d\/\u2026","rel":"","context":"In "\uae30\uc220\uc790\ub8cc"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/blog.box.kr\/index.php?rest_route=\/wp\/v2\/posts\/947"}],"collection":[{"href":"https:\/\/blog.box.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.box.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.box.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.box.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=947"}],"version-history":[{"count":0,"href":"https:\/\/blog.box.kr\/index.php?rest_route=\/wp\/v2\/posts\/947\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.box.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=947"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.box.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=947"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.box.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}