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rough justice: jstat + visualgc ã§ãƒªãƒ¢ãƒ¼ãƒˆãƒ›ã‚¹ãƒˆã‚’ç›£è¦–
ãã‚Œã§ã¯jstatã¨visualgcã‚’ä½¿ã£ã¦ã€ãƒªãƒ¢ãƒ¼ãƒˆãƒ›ã‚¹ãƒˆã®TOMCATã‚’ç›£è¦–ã—ã¦ã¿ã¾ã—ã‚‡ã†ã€‚ ã¾ãšã¯ã€Œç›£è¦–ã•ã‚Œã‚‹å´ï¼ˆTOMCATã®å‹•ä½œã™ã‚‹å´ï¼‰ã€ã®ãƒ›ã‚¹ãƒˆã®æº–å‚™ã‚’ãŠã“ãªã„ã¾ã™ã€‚ visualgcã¸ç›£è¦–å†…å®¹ã‚’é€šçŸ¥ã™ã‚‹ãƒ‡ãƒ¼ãƒ¢ãƒ³ãƒ—ãƒã‚°ãƒ©ãƒ ï¼ˆã‚¨ãƒ¼ã‚¸ã‚§ãƒ³ãƒˆï¼‰ã€Œjstatdã€ã‚’ å®Ÿè¡Œã—ã¾ã™ã€‚jstatdã‚’èµ·å‹•ã™ã‚‹ã«ã¯ã€Œãƒãƒªã‚·ãƒ¼ãƒ•ã‚¡ã‚¤ãƒ«ã€ãŒå¿…è¦ã§ã™ã€‚ ãƒãƒªã‚·ãƒ¼ãƒ•ã‚¡ã‚¤ãƒ«ã§ã¯åŽ³å¯†ãªã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£ãƒãƒªã‚·ãƒ¼ã‚’å®šç¾©ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ãŒã€ ä»Šå›žã¯ç°¡å˜ã«å…¨ã¦ã‚’è¨±å¯ã™ã‚‹ãƒãƒªã‚·ãƒ¼ã¨ã—ã¾ã™ã€‚ ï¼ˆå¤–éƒ¨å…¬é–‹ãƒ›ã‚¹ãƒˆç‰ã§ã¯çµ¶å¯¾ã«ã“ã®è¨å®šã§ã¯ãƒ€ãƒ¡ã§ã™ï¼‰ grant { permission java.security.AllPermission; }; ãƒ•ã‚¡ã‚¤ãƒ«åã¯ä»®ã«ã€Œall.policyã€ã¨ã§ã‚‚ã—ã¦ã€é©å½“ãªæ‰€ã«ä¿å˜ã—ã¾ã™ã€‚ ä¿å˜ã—ãŸã‚‰jstatdã‚’èµ·å‹•ã—ã¾ã™ã€‚ãƒ—ãƒãƒ³ãƒ—ãƒˆã‹ã‚‰ãƒãƒªã‚·ãƒ¼ãƒ•ã‚¡ã‚¤ãƒ«ã‚’ä¿å˜ã—ãŸãƒ‘ã‚¹ã« ç§»å‹•ã—ã¦
mamatumo 2012/05/16
gc

Java

jvm

jvmstat
ãƒªãƒ³ã‚¯
ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã«ä½¿ãˆã‚‹Javaæ€§èƒ½ç›£è¦–ãƒ„ãƒ¼ãƒ«
JavaVMã®çŠ¶æ³ã‚’ç°¡æ˜“å‡ºåŠ›ã™ã‚‹jstat Javaã«ã¯ã€ã‚°ãƒ©ãƒ•ã‚£ã‚«ãƒ«ãªãƒ•ãƒ©ãƒ•ã‚’å‡ºåŠ›ã™ã‚‹ç’°å¢ƒã‚„ãƒªã‚½ãƒ¼ã‚¹ãŒãªã„å ´åˆã‚’æƒ³å®šã—ãŸãƒ„ãƒ¼ãƒ«ã‚‚ç”¨æ„ã•ã‚Œã¦ã„ã¾ã™ã€‚jstatï¼ˆJava 1.4ä»¥å‰ã¯jvmstatï¼‰ã¨å‘¼ã°ã‚Œã‚‹ãƒ„ãƒ¼ãƒ«ã§ã™ã€‚ä½¿ã„æ–¹ã¯ç°¡å˜ã§ã™ã€‚ jstat -å‡ºåŠ›ã‚ªãƒ—ã‚·ãƒ§ãƒ³ï¼ˆ-h[ãƒ˜ãƒƒãƒ€ãƒ¼ã‚’å‡ºåŠ›ã™ã‚‹è¡Œé–“éš”]ï¼‰ [ãƒ—ãƒã‚»ã‚¹ç•ªå·] [å‡ºåŠ›é–“éš”ï¼ˆãƒŸãƒªç§’ï¼‰] [æ³¨] å‡ºåŠ›ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã«ã¤ã„ã¦ã¯[Java ä»®æƒ³ãƒžã‚·ãƒ³çµ±è¨ˆãƒ‡ãƒ¼ã‚¿ç›£è¦–ãƒ„ãƒ¼ãƒ«]ã‚’å‚è€ƒã«ã—ã¦ãã ã•ã„ã€‚ ä¾‹ãˆã°ã€ C:\>jstat -gcutil -h5 6684 1000 ã‚’å…¥åŠ›ã™ã‚‹ã¨ã€æ¬¡ã®ã‚ˆã†ã«å‡ºåŠ›ã•ã‚Œã¾ã™ã€‚ å‡ºåŠ›ã‚ªãƒ—ã‚·ãƒ§ãƒ³: gcutilã§æŒ‡å®šã•ã‚ŒãŸãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆã§ã€ãƒ˜ãƒƒãƒ€ãƒ¼ã‚’5è¡Œé–“éš”ã€1ç§’é–“éš”ã§å‡ºåŠ›ã—ã¾ã™ã€‚ S0 S1 E O P YGC YGCT FGC FGCT GCT 87.58 0.00 74.95 69.37 99.47 302 0
mamatumo 2012/05/16
gc

Java

jvm

jvmstat
ãƒªãƒ³ã‚¯
GCã®å¯è¦–åŒ–ãƒ„ãƒ¼ãƒ«ã‚’èª¿ã¹ã¦ã¿ãŸ - oknknicã®æ—¥è¨˜
Javaã®GCã‚’å¯è¦–åŒ–ã™ã‚‹ãƒ„ãƒ¼ãƒ«ã«ã¤ã„ã¦èª¿ã¹ã¦ã¿ãŸã€‚ GCã®ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒ«ãŒçŸã„ã¨GCã«ã‚ˆã‚‹è² è·ãŒé«˜ã„ã¨ã„ãˆã‚‹ãŸã‚ã€ãƒ’ãƒ¼ãƒ—ã‚µã‚¤ã‚ºã‚’èª¿æ•´ã™ã‚‹ã“ã¨ã§æ€§èƒ½æ”¹å–„ãŒè¦‹è¾¼ã¾ã‚Œã‚‹ã€‚ ãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ ã§å¯è¦–åŒ– visualgcã‚’ç”¨ã„ã‚‹ã€‚ 1. jvmstat ã®ãƒšãƒ¼ã‚¸ã®ãƒ€ã‚¦ãƒ³ãƒãƒ¼ãƒ‰ãƒªãƒ³ã‚¯ã‹ã‚‰ã€ jvmstat ã‚’ãƒ€ã‚¦ãƒ³ãƒãƒ¼ãƒ‰(â€»visualgcã‚‚å«ã¾ã‚Œã¦ã„ã‚‹) 2. %JAVA_HOME%/bin/jps.exe ã‚’å®Ÿè¡Œã—ã€GCç›£è¦–å¯¾è±¡ã®JVMãƒ—ãƒã‚»ã‚¹ç•ªå·ã‚’ç¢ºèªã™ã‚‹ 3. %JVMSTAT_HOME%/bat/visualgc.cmd ã‚’ã€ä¸Šè¨˜ã§ç¢ºèªã—ãŸJVMãƒ—ãƒã‚»ã‚¹ç•ªå·ã‚’å¼•æ•°ã§æŒ‡å®šã—ã¦å®Ÿè¡Œã™ã‚‹ ãƒã‚°å‡ºåŠ›ï¼†Viewerã§å¯è¦–åŒ– å®Ÿé‹ç”¨ä¸ã¯ã€ãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ è¡¨ç¤ºã¯è² è·ãŒå¤§ãã„ãŸã‚éžç¾å®Ÿçš„ã€‚ ãã“ã§ã€JVMã®èµ·å‹•ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã§ãƒã‚°å‡ºåŠ›ã‚’æŒ‡å®šã—ã€ãƒã‚°ã‚’ã¯ã‹ã›ã‚‹ã€‚ã§ã€ãã®ãƒã‚°ã‚’GCViewerã§è¦–è¦šçš„ã«è¡¨ç¤ºã€‚ 1. ä¸‹è¨˜ã®ã‚³
mamatumo 2012/05/16
gc

Java

jvm

jvmstat
ãƒªãƒ³ã‚¯
Javaãƒ¡ãƒ¢ãƒªã€GCãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã¨ãã‚Œã«ã¾ã¤ã‚ã‚‹ãƒˆãƒ©ãƒ–ãƒ«å¯¾å¿œæ‰‹é †ã¾ã¨ã‚ - æ—¥è¨˜ã®ã‚ˆã†ãªä½•ã‹
GCå‘¨ã‚Šã§ãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã—ãŸéš›ã®çµŒé¨“ã‚„ã€Webç‰ã§èª¿ã¹ãŸã“ã¨ã‚’ã¾ã¨ã‚ã¦ã¿ã‚‹ã€‚ å‰æ ãƒ»JVMã¯ã€Sun Javaã‚’æƒ³å®šã€‚(ä»–ã¯ä½¿ã£ãŸã“ã¨ãªã„ã§ã™ã€‚ã€‚ã€‚) ãƒ»Sun Java 1.5-1.6ã‚’æƒ³å®šã€‚ ç›®æ¨™ ãƒžã‚¤ãƒŠãƒ¼GCã€Full GCãã‚Œãžã‚ŒãŒé »ç™ºã™ã‚‹ã“ã¨ãªãã€ã‹ã¤ãã‚Œãžã‚Œã®å®Ÿè¡Œæ™‚é–“ã‚’1ç§’æœªæº€ã«æŠ‘ãˆã‚‹ã“ã¨ã€‚ ãƒžã‚¤ãƒŠãƒ¼GCã¯1ç§’æœªæº€ã©ã“ã‚ã§ã¯ãªãã€ã‚‚ã£ã¨çŸããªã‚‹ã¹ãã€‚ã©ã‚Œãã‚‰ã„ãŒç†æƒ³ã‹ã¯ï¼Ÿ(0.1ç§’æœªæº€ãã‚‰ã„ã‚’ç›®æŒ‡ã—ãŸã„ï¼Ÿ) é€£ç¶šã—ãŸè² è·çŠ¶æ…‹(æƒ³å®šã•ã‚Œã‚‹ãƒ”ãƒ¼ã‚¯ã‚¢ã‚¯ã‚»ã‚¹)ã§ã‚‚OutOfMemoryErrorãŒç™ºç”Ÿã—ãªã„ã“ã¨ã€‚ ç†æƒ³çš„ãªçŠ¶æ…‹ã¯ã€ä¸Šè¨˜ã«åŠ ãˆã¦ã€Full GCã®ç™ºç”ŸãŒä½Žé »åº¦ã§ã‚ã‚‹ã“ã¨ã€‚ å…·ä½“çš„ã«ã¯ã€ã§ãã‚‹ã ã‘ãƒžã‚¤ãƒŠãƒ¼GCã§çŸå‘½ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆ(1å›žä½¿ã£ãŸã‚‰ã‚‚ã†ä½¿ã‚ãªã„ã‚ˆã†ãªã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã€‚é€†ã«ã‚»ãƒƒã‚·ãƒ§ãƒ³ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆç‰ã¯é•·å‘½ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã¨ãªã‚‹)ã‚’ç ´æ£„ã•ã›ã¦ã€çŸå‘½ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆãŒã€Tenu
mamatumo 2011/02/28
performance

gc

Java

jvm

jvmstat
ãƒªãƒ³ã‚¯
Java æš—å·åŒ–æ‹¡å¼µæ©Ÿèƒ½ JDK5.0
Java Is the Language of Possibilities Java is powering the innovation behind our digital world. Harness this potential with Java resources for student coders, hobbyists, developers, and IT leaders.
mamatumo 2007/11/16
applet
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