[B! GC] kuchitamaã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

kuchitama id:kuchitama

GCã«é–¢ã™ã‚‹kuchitamaã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (4)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

ç¬¬5å›žã€€Java VMã®æƒ…å ±ã‚’å–å¾—ã™ã‚‹ï¼ˆå‰ç·¨ï¼‰ | gihyo.jp
Java VMã§ç›£è¦–ã™ã¹ã4ã¤ã®ãƒã‚¤ãƒ³ãƒˆ å‰å›žã¯ã€ã‚·ã‚¹ãƒ†ãƒ é‹ç”¨è€…ãŒJava VMï¼ˆJVMâ ï¼‰â ã€ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚µãƒ¼ãƒã€Javaã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‹ã‚‰ã€ãƒã‚°ã€JMXã¨MBeanã€ãƒ€ãƒ³ãƒ—ã‚’ä½¿ç”¨ã—ã¦æƒ…å ±ã‚’å–å¾—ã™ã‚‹æ–¹æ³•ã‚’ç´¹ä»‹ã—ã¾ã—ãŸã€‚ä»Šå›žã¨æ¬¡å›žã§ã¯ã€JVMã‹ã‚‰ã©ã®ã‚ˆã†ãªæƒ…å ±ã‚’æœ€ä½Žé™å–å¾—ã™ã‚‹ã¹ãã‹ã€è©³ç´°ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ ã‚·ã‚¹ãƒ†ãƒ é‹ç”¨è€…ã¯ã€JVMãŒæ»žã‚Šãªãã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚’æ”¯æ´ã§ãã¦ã„ã‚‹ã‹ã€ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ãŒå‹•ã„ã¦ã„ã‚‹ã‹ã‚’ç¢ºèªã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚JVMã¯å†…éƒ¨ã§ç®¡ç†ã—ã¦ã„ã‚‹ã•ã¾ã–ã¾ãªãƒªã‚½ãƒ¼ã‚¹ã«é–¢ã™ã‚‹æƒ…å ±ã‚’æŒã£ã¦ã„ã¾ã™ãŒã€ã‚·ã‚¹ãƒ†ãƒ é‹ç”¨è€…ãŒãã‚Œã‚‰ã‚’ã™ã¹ã¦ã‚’ç›£è¦–ã™ã‚‹ã“ã¨ã¯ä¸å¯èƒ½ã§ã™ã€‚ãã“ã§ã€ãŸãã•ã‚“ã‚ã‚‹æƒ…å ±ã®ä¸ã‹ã‚‰ã€æ¬¡ã®4ã¤ã®ãƒã‚¤ãƒ³ãƒˆã«çµžã£ã¦JVMã®å‹•ãã‚’ç›£è¦–ã—ã¾ã™ã€‚ JVMãŒã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚’ä¸æ–ã™ã‚‹ã“ã¨ãªãå®Ÿè¡Œã§ãã¦ã„ã‚‹ã‹ JVMãŒã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã®ãƒªã‚½ãƒ¼ã‚¹ã‚’å¥ªã£ã¦ã„ãªã„ã‹ OSã®ãƒªã‚½ãƒ¼ã‚¹ãŒååˆ†ã«å‰²ã‚Šå½“ã¦ã‚‰
kuchitama 2017/01/29
jvm

ã‚·ã‚¹ãƒ†ãƒ

Java

GC

JVM
ãƒªãƒ³ã‚¯
Java8ã®HotSpotVMã‹ã‚‰Permanenté ˜åŸŸãŒæ¶ˆãˆãŸç†ç”±ã¨ãã®å½±éŸ¿ | ã‚®ãƒ¼ã‚¯ã‚’ç›®æŒ‡ã—ã¦
ä»Šå›žã‚‚å‰å›žã®è¨˜äº‹ã«ã¤ã¥ãã€Java8ã«ã‚ˆã‚‹å¤‰æ›´ç‚¹ã§æœªã ã‚ã¾ã‚Šç´¹ä»‹ã•ã‚Œã¦ã„ãªã„ãƒã‚¤ãƒ³ãƒˆã‚’è¨˜äº‹ã«ã—ã‚ˆã†ã¨æ€ã†ã€‚ ä»Šå›žã¯Java8ã®HotSpotVMã®è©±ã€‚Java8ã§ã¯JEP122ãŒå–ã‚Šè¾¼ã¾ã‚Œã€VMã®ãƒ¡ãƒ¢ãƒªãƒ¢ãƒ‡ãƒ«ãŒå¤‰æ›´ã•ã‚ŒãŸã€‚JEP122ã®ã‚¿ã‚¤ãƒˆãƒ«ã€ŒRemove the Permanent Generationã€ã‹ã‚‰æƒ³åƒã§ãã‚‹ã¨ãŠã‚Šã€Java8ã®HotSpotVMã‹ã‚‰ã¯å¾“æ¥ã®Permanenté ˜åŸŸãŒç„¡ããªã£ãŸã€‚ ãªãœã€ã“ã†ã„ã£ãŸå¤‰æ›´ãŒè¡Œã‚ã‚ŒãŸã®ã ã‚ã†ã‹ï¼Ÿã¾ãŸã€å…ƒã€…Permanenté ˜åŸŸã«æ ¼ç´ã•ã‚Œã¦ã„ãŸæƒ…å ±ã¯ä½•å‡¦ã«ã„ã£ã¦ã—ã¾ã£ãŸã®ã‹ï¼ŸJVMä»˜å±žã®ãƒ„ãƒ¼ãƒ«ã«ã©ã†ã„ã£ãŸå½±éŸ¿ãŒã‚ã‚‹ã®ã‹ï¼Ÿ ä»Šå›žã®è¨˜äº‹ã§ã¯ã“ã®ç‚¹ã‚’ã¾ã¨ã‚ã¦ã„ã“ã†ã¨æ€ã†ã€‚ ãªãŠã€HotSpotVMã®ãƒ¡ãƒ¢ãƒªãƒ¢ãƒ‡ãƒ«ã«ã¤ã„ã¦è©³ã—ããªã„æ–¹ã¯ã€å…ˆã«ã“ã¡ã‚‰ã®é …ç•ªï¼ˆã€Œè£œè¶³ â€“ HotSpotVMã®ãƒ¡ãƒ¢ãƒªæ§‹é€ æ¦‚èª¬ï¼‰ã‚’èªã‚“ã§ã„ãŸã ãã¨ã‚¹ãƒ ãƒ¼ã‚ºã«èªã¿é€²ã‚ã‚‰ã‚Œã‚‹ã
kuchitama 2015/10/07
Java

java8

jvm

gc

performance

metaspace
ãƒªãƒ³ã‚¯
git gcã®è‡ªå‹•å®Ÿè¡Œã¯ã„ã¤è¡Œã‚ã‚Œã‚‹ã®ã‹ - $shibayu36->blog;
gitã‚’ä½¿ã£ã¦ã‚‹ã¨ãŸã¾ã«git gcãŒèµ°ã‚‹ã€‚ã“ã‚ŒãŒã©ã†ã„ã†ã‚¿ã‚¤ãƒŸãƒ³ã‚°ã§å®Ÿè¡Œã•ã‚Œã¦ã„ã‚‹ã‹èª¿ã¹ãŸã®ã§è»½ããƒ¡ãƒ¢ã—ã¦ãŠãã€‚ Gitã§ã¯æ™‚ã€…auto gcãŒèµ°ã‚‹ Git - Book ã‚’è¦‹ã‚‹ã¨ã€ä»¥ä¸‹ã®ã‚ˆã†ã«æ›¸ã‹ã‚Œã¦ã„ã‚‹ã€‚ Git ã¯æ™‚ã€… "auto gc" ã¨å‘¼ã°ã‚Œã‚‹ã‚³ãƒžãƒ³ãƒ‰ã‚’è‡ªå‹•çš„ã«å®Ÿè¡Œã—ã¾ã™ã€‚å¤§æŠµã®å ´åˆã€ã“ã®ã‚³ãƒžãƒ³ãƒ‰ã¯ä½•ã‚‚ã—ã¾ã›ã‚“ã€‚ã‚‚ã—æ²¢å±±ã®ç·©ã„ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆï¼ˆãƒ‘ãƒƒã‚¯ãƒ•ã‚¡ã‚¤ãƒ«ã®ä¸ã«ãªã„ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆï¼‰ãŒã‚ã£ãŸã‚Šã€ã‚ã¾ã‚Šã«å¤šãã®ãƒ‘ãƒƒã‚¯ãƒ•ã‚¡ã‚¤ãƒ«ãŒã‚ã‚‹ã¨ã€Git ã¯å®Œå…¨ãªï¼ˆfull-fledgedï¼‰git gc ã‚³ãƒžãƒ³ãƒ‰ã‚’é–‹å§‹ã—ã¾ã™ã€‚ ã•ã‚‰ã«ã€auto gcã¯æ™®æ®µã¯ä½•ã‚‚ã›ãšã€ç‰¹å®šã®æ¡ä»¶ã‚’æº€ãŸã™ã¨å®Ÿéš›ã«gcã™ã‚‹ã¨ã‚‚æ›¸ã‹ã‚Œã¦ã„ã‚‹ã€‚ ç¹°ã‚Šè¿”ã—ã¾ã™ãŒã€ã“ã‚Œã¯é€šå¸¸ã¯ä½•ã‚‚è¡Œã„ã¾ã›ã‚“ã€‚ç´„ 7,000å€‹ã‚‚ã®ç·©ã„ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆãŒã‚ã‚‹ã‹ã€ã¾ãŸã¯50ä»¥ä¸Šã®ãƒ‘ãƒƒã‚¯ãƒ•ã‚¡ã‚¤ãƒ«ãŒãªã„ã¨ã€Gitã¯å®Ÿéš›ã« gc ã‚³ãƒžãƒ³ãƒ‰ã‚’é–‹å§‹ã—ã¾ã›ã‚“ã€‚ã“ã‚Œ
kuchitama 2015/07/06
GC

git
ãƒªãƒ³ã‚¯
2010-07-16
2010-07-16 Java: å…¬å¼ã‚µã‚¤ãƒˆãŒå¼•è¶Šã—ä¸ prog Java ã®é–‹ç™ºè€…å‘ã‘å…¬å¼ã‚µã‚¤ãƒˆã¯ã“ã‚Œã¾ã§ http://java.sun.com ã¨ã„ã† URL ã§é‹å–¶ã•ã‚Œã¦ã„ãŸãŒã€7 æœˆä¸ã« Oracle ã®ã‚µã‚¤ãƒˆã¸å¼•ã£è¶Šã™ã‚‰ã—ã„ã€‚æ–°ã—ã„ URL ã¯ http://www.oracle.com/tech network/java/index.html ã«ãªã‚‹ã€‚ã™ã§ã«ãƒˆãƒƒãƒ—ãƒšãƒ¼ã‚¸ã¯å˜åœ¨ã—ã¦ã„ã‚‹ã€‚ 2010-07-16 Java: PermGen ã¯ãƒ’ãƒ¼ãƒ—ã®å¤– prog ä»Šé ƒçŸ¥ã£ãŸã€‚PermGen ã‚‚æ™®é€šã«ãƒ’ãƒ¼ãƒ—å†…ã ã¨æ€ã£ã¦ã¾ã—ãŸã€‚
kuchitama 2014/09/26
Java

jvm

GC
ãƒªãƒ³ã‚¯
1