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ã‚ãªãŸã®Pythonã‚’çˆ†é€Ÿã«ã™ã‚‹ï¼—ã¤ã®æ–¹æ³•
æœ€è¿‘ãƒ—ãƒã‚³ãƒ³ï¼ˆãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ãƒ»ã‚³ãƒ³ãƒ†ã‚¹ãƒˆï¼‰ã‚’ã¯ã˜ã‚ã¾ã—ãŸã€‚ åŸºæœ¬çš„ã«ã¯ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ å‹è² ãªã®ã§ã™ãŒã€ã¨ã«ã‹ãé€Ÿåº¦ã‚’ç«¶ã†ãƒ—ãƒã‚³ãƒ³ã§ã™ã€‚ å°æ‰‹å…ˆã®é€Ÿåº¦ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã‚‚ãƒã‚«ã«ã§ãã¾ã›ã‚“ã€‚ ä½•ãŒé€Ÿãã¦ä½•ãŒé…ã„ã®ã‹ã¯ã£ãã‚Šã•ã›ã‚‹ãŸã‚ã€ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã«ãªã‚Šãã†ãªæ“ä½œã®ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã‚’å–ã‚Šã¾ã—ãŸã€‚ å®Ÿè¡Œç’°å¢ƒã¯ä¸‹è¨˜ã®ã¨ãŠã‚Šã§ã™ã€‚ python2.7.5 OS: MacOSX 11 CPU: Core i7 2GHz (4core) MEM: 16GB ãã®1. é…åˆ—ã®åˆæœŸåŒ–ã‚’é«˜é€ŸåŒ–ã™ã‚‹ ã¾ãšã¯ãƒ—ãƒã‚³ãƒ³ã®åŸºæœ¬ä¸ã®åŸºæœ¬ã€é…åˆ—ã®åˆæœŸåŒ–ã§ã™ã€‚ ä¸‹è¨˜ï¼—ã¤ã®åˆæœŸåŒ–æ–¹æ³•ã‚’æ¯”è¼ƒã—ã¦ã¿ã¾ã™ã€‚ ç©ºé…åˆ—ã¸appendã—ã¦é…åˆ—ã‚’ã¤ãã‚‹ forå†…åŒ…è¡¨è¨˜ã§é…åˆ—ã‚’ã¤ãã‚‹ ã‚µã‚¤ã‚º1(None)ã®é…åˆ—ã‚’ä¹—ç®—ã—ã¦ã‹ã‚‰å€¤ã‚’ä»£å…¥ã™ã‚‹ ã‚µã‚¤ã‚º1(None)ã®é…åˆ—ã‚’ä¹—ç®—ã™ã‚‹ ã‚µã‚¤ã‚º1(ã‚¼ãƒ)ã®é…åˆ—ã‚’ä¹—ç®—ã™ã‚‹ ã™ã¹ã¦ã‚¼ãƒã®arrayã‚’ã¤ãã‚‹ 0ã€œnã®arra
maisenakajima 2015/05/10
programming

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

performance

ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°

python

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Monitoring Mule with Java Mission Control - DZone
Starting with JDK 7 update 40 (7u40), the Java Mission Control is bundled with the HotSpot JVM. The Java Mission Control can be used for simple monitoring of a Mule instance, for instance during development or for those content with what the community edition of Mule has to offer. In fact, Java Mission Control can be used to monitor any Java application that exposes a set of JMX MBeans. Since I wo
maisenakajima 2015/04/06
java

JMX

performance

monitoring
ãƒªãƒ³ã‚¯
Tuning Java Servers
InfoQ Software Architects' Newsletter A monthly overview of things you need to know as an architect or aspiring architect. View an example
maisenakajima 2014/11/30
server

tuning

performance

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

programming

java
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nginxæœ€å¤§ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚’å‡ºã™ãŸã‚ã®åŸºæœ¬è¨å®š | Node.jsæŠ€è¡“
è§£èª¬ worker_processes auto; - Nginx æœ¬ä½“ã®ãƒ—ãƒã‚»ã‚¹æ•°ã€autoã«ã—ã¦nginxå†…éƒ¨åˆ¤å®šã«ä»»ã›ã‚‹ã®ã¯è³¢æ˜Ž worker_rlimit_nofile 100000; - workerãƒ—ãƒã‚»ã‚¹ãŒæœ€å¤§ã«é–‹ã‘ã‚‹ãƒ•ã‚¡ã‚¤ãƒ«æ•°ã®åˆ¶é™ã€‚ã“ã®ã‚ˆã†ã«è¨å®šã—ãŸã‚‰ã€ulimit -aä»¥ä¸Šã®ãƒ•ã‚¡ã‚¤ãƒ«æ•°ã‚’å‡¦ç†ã§ãã‚‹ã‚ˆã†ã«ãªã‚Šã€too many open fileså•é¡Œã‚’å›žé¿ã§ãã‚‹ worker_connections 2048; - ä¸€ã¤ã®workerãƒ—ãƒã‚»ã‚°ãŒé–‹ã‘ã‚‹æœ€å¤§ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³æ•° multi_accept on; - ã§ãã‚‹ã ã‘ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã‹ã‚‰ã®ãƒªã‚¯ã‚¨ã‚¹ãƒˆã‚’å—ã‘å–ã‚‹ use epoll; - Linuxã‚«ãƒ¼ãƒãƒ«2.6ä»¥ä¸Šã®å ´åˆã¯epollã€BSDã®å ´åˆkqueue server_tokens off; - ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£å¯¾ç–ã§ã™ã€ã‚¨ãƒ©ãƒ¼ç”»é¢ã®nginxãƒãƒ¼ã‚¸ãƒ§ãƒ³ç•ªå·ã‚’éžè¡¨ç¤º sendf
maisenakajima 2014/11/21
nginx

HTTP

performance

ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°

ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹

Linux
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å®Ÿä¾‹Javaãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ï¼ ã€œç¨¼åƒä¸ã®ã‚·ã‚¹ãƒ†ãƒ ã‚’ç«‹ã¦ç›´ã—ãŸåŠå¹´é–“ã®è»Œè·¡
2. Copyright Â© Acroquest Techno logy Co., Ltd. All rights reserved. è‡ªå·±ç´¹ä»‹ 2 â€¢ è°·æœ¬ å¿ƒ (Shin Tanimoto) - Acroquest Techno logyæ ªå¼ä¼šç¤¾ - é–‹ç™ºï¼†ãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒˆæ•™è‚² - JavaOneã‚¹ãƒ”ãƒ¼ã‚«ãƒ¼ - JJUG / é–¢ã‚¸ãƒ£ãƒ / S2JSFã‚³ãƒŸãƒƒã‚¿ - Twitter : @cero_t (æ—¥æœ¬èªž) - Facebook : shin.tanimoto (è‹±èªž) 3. Copyright Â© Acroquest Techno logy Co., Ltd. All rights reserved.Copyright Â© Acroquest Techno logy Co., Ltd. All rights reserved. ä¸–ã®ä¸ã®ã‚·ã‚¹ãƒ†ãƒ ã¯ å®Œç’§ã ã‚ã†ã‹ï¼Ÿ 3 4. Copyrigh
maisenakajima 2014/11/16
programming

performance

tuning

slide

Slideshare

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java

trouble
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Native C/C++ Like Performance For Java Object Serialization - Java Code Geeks
maisenakajima 2014/11/05
programming

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

java

performance
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é–‹ç™ºè€…ã®ãŸã‚ã®SQLãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã®å…¨ã¦
å‰æ›¸ã - ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã®ä½œæˆã¯ãªãœé–‹ç™ºè€…ã®ã‚¿ã‚¹ã‚¯ãªã®ã‹ ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã® å†…éƒ¨æ§‹é€ - ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã¯ä½•ã«ä¼¼ã¦ã„ã‚‹ã‹ ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ ãƒªãƒ¼ãƒ•ãƒŽãƒ¼ãƒ‰ - äºŒé‡é€£çµãƒªã‚¹ãƒˆ æ¤œç´¢ ãƒ„ãƒªãƒ¼(Bãƒ„ãƒªãƒ¼) - ãƒãƒ©ãƒ³ã‚¹æœ¨ é…ã„ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ ãƒ‘ãƒ¼ãƒˆI - ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã‚’é…ãã™ã‚‹2ã¤ã®åŽŸå› where å¥ - æ¤œç´¢ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚’æ”¹å–„ã™ã‚‹ãŸã‚ã«ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã‚’ä½œæˆ ç‰ä¾¡ æ¼”ç®—å - ä¸€è‡´ã™ã‚‹ã‚ãƒ¼ã®æ¤œç´¢ ãƒ—ãƒ©ã‚¤ãƒžãƒªã‚ãƒ¼ - ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã®ä½¿ã„æ–¹ã‚’ç¢ºèª è¤‡åˆã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ - è¤‡æ•°åˆ—ã«å¯¾ã™ã‚‹ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ é…ã„ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ ãƒ‘ãƒ¼ãƒˆII - å‰ã®å•é¡Œç‚¹ãŒå†ã³ é–¢æ•° - whereå¥ã® ä¸ã§ã®é–¢æ•° å¤§æ–‡å—ãƒ»å°æ–‡å—ã‚’åŒºåˆ¥ã™ã‚‹ æ¤œç´¢ - UPPERã¨ LOWER ãƒ¦ãƒ¼ã‚¶å®šç¾© é–¢æ•° - é–¢æ•°ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã®åˆ¶é™ ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã®ä½œã‚ŠéŽãŽ - å†—é•·æ€§ã®æŽ’é™¤æ³• ãƒ‘ãƒ©ãƒ¡ãƒ¼ã‚¿åŒ– ã‚¯ã‚¨ãƒª - ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£ã¨ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã®ãŸã‚ã« ç¯„å›² æ¤œ
maisenakajima 2014/10/26
SQL

ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹

ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹

database

ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°

performance

tuning
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Private Presentation
Private content!This content has been marked as private by the uploader.
maisenakajima 2014/10/25
ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹

ãƒ–ãƒ©ã‚¦ã‚¶

Performance

Web

HTML
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Javaã§ãƒ•ã‚¡ã‚¤ãƒ«ã‚’é«˜é€Ÿã«ã‚³ãƒ”ãƒ¼ã™ã‚‹æ–¹æ³•
Javaã§ã¯ã•ã¾ã–ã¾ãªæ–¹æ³•ã§ãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚³ãƒ”ãƒ¼ã‚’å®Ÿè£…ã§ãã‚‹ã€‚Javaãƒ—ãƒã‚°ãƒ©ãƒžãªã‚‰èª°ã—ã‚‚ä¸€åº¦ã¯ã€ã©ã®æ–¹æ³•ãŒã‚‚ã£ã¨ã‚‚é«˜é€Ÿã«ãƒ•ã‚¡ã‚¤ãƒ«ã‚³ãƒ”ãƒ¼ã‚’å®Ÿç¾ã§ãã‚‹ã‹è€ƒãˆãŸã“ã¨ãŒã‚ã‚‹ã ã‚ã†ã€‚ãƒ—ãƒã‚°ãƒ©ãƒžã«ã¨ã£ã¦å®Ÿè¡Œé€Ÿåº¦ã¯ã„ã¤ã§ã‚‚æœ€å¤§ã®é–¢å¿ƒäº‹ã®ã²ã¨ã¤ã ã€‚ File Copy in Java - Benchmark - Javalobbyã«ã€ã“ã†ã—ãŸç–‘å•ã«å¯¾ã™ã‚‹ã²ã¨ã¤ã®çµæžœã¨ã—ã¦èˆˆå‘³æ·±ã„è¨˜äº‹ãŒæŽ²è¼‰ã•ã‚Œã¦ã„ã‚‹ã€‚Baptiste Wichtæ°ãŒæŠ•ç¨¿ã—ãŸè¨˜äº‹ã§ã€ã‚³ãƒ”ãƒ¼å®Ÿè£…ã‚’10ã®ç¨®é¡žã«åˆ†é¡žã—ã€ãã‚Œãžã‚Œã©ã†ã„ã£ãŸé•ã„ãŒç¾ã‚Œã‚‹ã‹ã‚’ç´¹ä»‹ã—ã¦ã„ã‚‹ã€‚ã‚³ãƒ”ãƒ¼æ–¹æ³•ã¯æ¬¡ã®ã¨ãŠã‚Šã€‚ èªã¿è¾¼ã¿ã¨æ›¸ãå‡ºã—ã®Streamã‚’é–‹ã„ã¦ã€byteã”ã¨ã«ãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚³ãƒ”ãƒ¼ã‚’å®Ÿæ–½ã€‚ èªã¿è¾¼ã¿ã¨æ›¸ãå‡ºã—ã®Readerã‚’é–‹ã„ã¦ã€charã”ã¨ã«ãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚³ãƒ”ãƒ¼ã‚’å®Ÿæ–½ã€‚ èªã¿è¾¼ã¿ã¨æ›¸ãå‡ºã—ã®BufferdStreamã‚’é–‹ã„ã¦ã€byteã”ã¨ã«ãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚³ãƒ”ãƒ¼ã‚’å®Ÿæ–½ã€‚
maisenakajima 2014/09/27
java

Stream

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

programming

performance
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Apacheã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ãƒ¡ãƒ¢ - Qiita
å€‹äººçš„Apacheãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®ãƒ¡ãƒ¢ã€‚ é–“é•ã„ãŒã‚ã£ãŸã‚‰æ•™ãˆã¦ä¸‹ã•ã„ï¼ prefork å‰æ Apacheã§ã¯ã€ãƒªã‚¯ã‚¨ã‚¹ãƒˆã¯Apacheã®åã‚µãƒ¼ãƒãƒ—ãƒã‚»ã‚¹ãŒå‡¦ç†ã™ã‚‹ã€‚ åã‚µãƒ¼ãƒãƒ—ãƒã‚»ã‚¹ã¯å‹•çš„ã«forkã§ç”Ÿæˆã•ã‚ŒãŸã‚Šã€æ®ºã•ã‚ŒãŸã‚Šã™ã‚‹ã€‚ ãŒã€forkã¯ã¨ã¦ã‚‚é‡ã„å‡¦ç†ãªã®ã§ã€forkãŒç™ºç”Ÿã—ãªã„ã‚ˆã†ã«è¨å®šã™ã‚‹ã®ãŒã‚ˆã„ã€‚ ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°æ–¹é‡ è² è·ãŒé«˜ã‹ã‚ã†ãŒä½Žã‹ã‚ã†ãŒå¸¸ã«ä¸€å®šæ•°ã®ãƒ—ãƒã‚»ã‚¹ãŒå‹•ã„ã¦ã„ã‚‹çŠ¶æ…‹ã«ã™ã‚‹ã€‚ preforkã®å‹•ä½œ MaxClientsã¯çµ¶å¯¾å€¤ã€‚ åãƒ—ãƒã‚»ã‚¹æ•°ã¯ã“ã®å€¤ã‚’è¶…ãˆãªã„ã€‚ ï¼ˆä»¥ä¸‹æ£ç¢ºã§ã¯ãªã„ã§ã™ãŒç°¡å˜ã«ï¼‰ Apacheã¯è² è·ãŒé«˜ããªã£ã¦ããŸã‚‰ åãƒ—ãƒã‚»ã‚¹ã‚’ç”Ÿæˆã—ã¦ã„ã ã‚¢ã‚¤ãƒ‰ãƒ«çŠ¶æ…‹ã®åãƒ—ãƒã‚»ã‚¹ã¯MinSpareServersä»¥ä¸Šã«ãªã‚‹ã‚ˆã†ç¶æŒ MaxClientsä»¥ä¸Šã®åãƒ—ãƒã‚»ã‚¹ã¯ç”Ÿæˆã—ãªã„ MinSpareServersã‚ˆã‚ŠMaxClientsãŒå¼·ã„ è² è·ãŒä½Žããªã£ã¦ããŸ
maisenakajima 2014/09/13
apache

ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°

performance

ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹

Linux

tuning
ãƒªãƒ³ã‚¯
Javaãƒˆãƒ©ãƒ–ãƒ«ã«å‚™ãˆã‚ˆã† #jjug_ccc #ccc_h2
1. ã€JJUG CCC 2014 Spring H-Ââ€2ã€‘ Javaãƒˆãƒ©ãƒ–ãƒ«ã«å‚™ãˆã‚ˆã† æ—¥æœ¬Javaãƒ¦ãƒ¼ã‚¶ã‚°ãƒ«ãƒ¼ãƒ— ä¸Šå¦» å®œäºº (ã‚ã’ã¤ã¾ ã®ã‚Šã¨) ã¯ã¦ãªãƒ–ãƒã‚° : n-agetsuma.hatena blog.com 2. è‡ªå·±ç´¹ä»‹ ä¸Šå¦» å®œäºº (ã‚ã’ã¤ã¾ ã®ã‚Šã¨) nï®â€¯ é›»è©±ã®è£å´ã‚’ä½œã£ã¦ã„ã‚‹ä¼šç¤¾ã§åƒã„ã¦ã„ã¾ã™ nï®â€¯ Java/APã‚µãƒ¼ãƒã®ç¤¾å†…æŠ€è¡“ã‚µãƒãƒ¼ãƒˆã€ãƒˆãƒ©ãƒ–ãƒ«è§£æž nï®â€¯ Blog ã€Žè¦‹ç¿’ã„ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°æ—¥è¨˜ã€ ã€JJUG CCC 2014 Spring H-Ââ€2ã€‘
maisenakajima 2014/05/21
ãƒˆãƒ©ãƒ–ãƒ«

java

programming

performance

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

trouble
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dsync: Efficient Block-wise Synchronization of Multi-Gigabyte Binary Data | USENIX
Backing up important data is an essential task for system administrators to protect against all kinds of failures. However, traditional tools like rsync exhibit poor performance in the face of today's typical data sizes of hundreds of gigabytes. We address the probl em of efficient, periodic, multi-gigabyte state synchronization. In contrast to approaches like rsync which determine changes after th
maisenakajima 2014/05/11
linux

performance
ãƒªãƒ³ã‚¯
Webã‚µãƒ¼ãƒã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚’æ¸¬ã‚‹ ï¼š sar
Webã‚µãƒ¼ãƒã«é™ã‚‰ãšã ã‘ã©ã€ã‚µãƒ¼ãƒã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹æ¸¬å®šã‚’ã™ã‚‹ã¨ãã«ã¯ã€CPUåˆ©ç”¨çŽ‡ã‚„LoadAverageãªã©ã®å€¤ã‚’æ¸¬å®šã—ã¦ãŠãã¨ãƒ™ã‚¿ãƒ¼ã€‚ãã†ã„ã†ãƒ‡ãƒ¼ã‚¿ãŒã‚ã‚Œã°ã€httpdã®ã‚»ãƒƒã‚·ãƒ§ãƒ³æ•°ã®æ™‚é–“æŽ¨ç§»ã¨CPUåˆ©ç”¨çŽ‡ã®æŽ¨ç§»ã‚’çªãåˆã‚ã¦ã‚„ã‚‹ã“ã¨ã§ã€ãã®ãƒžã‚·ãƒ³ã®æ€§èƒ½ä¸€æ¯ã‚’ä½¿ã£ã¦ã„ã‚‹ã®ã‹ã€ä½™è£•ã§å‹•ã„ã¦ã„ã‚‹ã®ã‹ã®åˆ¤æ–ãŒã—ã‚„ã™ããªã‚‹ã‚ã‘ã ã€‚ Linuxã§ã‚ã‚Œã°"sar"ã¨ã„ã†ã‚³ãƒžãƒ³ãƒ‰ã‚’ä½¿ãˆã°ã€æ¯”è¼ƒçš„ç°¡å˜ã«CPUåˆ©ç”¨çŽ‡ã‚„LoadAverageã®ãƒ‡ãƒ¼ã‚¿ã‚’å–å¾—ã§ãã‚‹ã®ã§ã€ãã‚Œã‚’ä½¿ã†ã®ãŒã„ã„ã¨æ€ã†ã—ã€è‡ªåˆ†ã§ã‚‚ãã‚Œã‚’ä½¿ã£ã¦ãƒ‡ãƒ¼ã‚¿å–ã‚Šã—ã¦ã„ã‚‹ã“ã¨ãŒã»ã¨ã‚“ã©ã€‚ "sar"ã¯ã€sysstatã¨ã„ã†ãƒ‘ãƒƒã‚±ãƒ¼ã‚¸ã«å«ã¾ã‚Œã¦ã„ã‚‹ã®ã§ã€Debianã ã£ãŸã‚‰ aptitude install sysstat CentOSã§ã‚‚ yum install sysstat ã§ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã¯å®Œäº†ã€‚ ä½¿ã„æ–¹ã¯ç°¡å˜ã§ sar 10 ã¨ã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤
maisenakajima 2014/04/27
sarã‚³ãƒžãƒ³ãƒ‰ã®ä½¿ã„æ–¹ã®èª¬æ˜Žã€‚

Linux

command

ã‚³ãƒžãƒ³ãƒ‰

tool

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performance

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ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã«ä½¿ãˆã‚‹Javaæ€§èƒ½ç›£è¦–ãƒ„ãƒ¼ãƒ«
JavaVMã‚’ç›£è¦–ã™ã‚‹ãƒ„ãƒ¼ãƒ«ç¾¤ ä»Šå›žã¯ã€Java EEã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚’ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã™ã‚‹éš›ã«ä¾¿åˆ©ãªãƒ„ãƒ¼ãƒ«ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚JavaVMã®çŠ¶æ…‹ã‚’ç›£è¦–ï¼ãƒ¬ãƒãƒ¼ãƒˆã™ã‚‹ãƒ„ãƒ¼ãƒ«ã¯ã€ãƒ•ãƒªãƒ¼ãƒ»ã‚½ãƒ•ãƒˆã‚¦ã‚¨ã‚¢ã‚„è£½å“ã‚’å«ã‚ã€ã„ãã¤ã‹æä¾›ã•ã‚Œã¦ã„ã¾ã™ã€‚ç±³Oracleï¼ˆç±³Sun Microsystemsï¼‰ã®Javaç’°å¢ƒã«ã‚‚ã€æ¨™æº–ã§ä¾¿åˆ©ãªãƒ„ãƒ¼ãƒ«ç¾¤ãŒä»˜ã„ã¦ã„ã¾ã™ã€‚æœ¬è¨˜äº‹ã§ã¯ã€æ¨™æº–ãƒ„ãƒ¼ãƒ«ã§ã‚ã‚‹jconsoleã¨jstatã®2ã¤ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ è¡¨1: ä¸»ãªJavaVMç›£è¦–ï¼ãƒ¬ãƒãƒ¼ãƒ†ã‚£ãƒ³ã‚°ãƒ»ãƒ„ãƒ¼ãƒ« è£½å“å ç‰¹å¾´
maisenakajima 2014/04/08
jconsoleã¨jstatã®ç´¹ä»‹ã€‚

java

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ãƒ„ãƒ¼ãƒ«

performance

Tools
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Garbage First Garbage Collector (G1 GC) - Migration to, Expectations and Advanced Tuning
Learn what you need to know to experience nirvana in the evaluation of G1 GC even if your are migrating from Parallel GC to G1, or CMS GC to G1 GC You also get a walk through of some case study data G1 GCRead less
maisenakajima 2014/03/28
performance

ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°

tuning

java
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Oracle Tunes Java's Internal String Representation
InfoQ Software Architects' Newsletter A monthly overview of things you need to know as an architect or aspiring architect. View an example
maisenakajima 2013/12/29
In an ongoing effort to improve Java performance, Oracle has announced a change in the internal representation of strings in the String class as of Java 1.7.0_06.

performance

Java
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JPAã‹ã‚‰ãƒ•ã‚§ãƒƒãƒã‚µã‚¤ã‚ºã‚’å¤‰æ›´ã—ãŸã‹ã£ãŸ - kagamihogeã®æ—¥è¨˜
JPAã ã‘ã§å®Œçµã™ã‚‹ã®ã¯ã•ã™ãŒã«ãƒ ãƒªãŒã‚ã£ãŸã®ã§ã“ã†ã„ã†ã‚¿ã‚¤ãƒˆãƒ«ã«ã—ãŸã€‚ãŒã€JPAãƒ—ãƒãƒã‚¤ãƒ€å›ºæœ‰ã®APIã®ãƒ¬ãƒ™ãƒ«ã§ã¯ãƒ•ã‚§ãƒƒãƒã‚µã‚¤ã‚ºã‚’å¤‰æ›´ã™ã‚‹åŠ¹æžœã‚’ç¢ºèªã§ããŸã€‚ JDBCã®setF etchSizeå¤‰æ›´æ™‚ã®å‹•ãã‚’statspackã§è¦‹ã¦ã¿ã‚‹ - kagamihogeã®æ—¥è¨˜ã§ã¯JDBCã‚’ç›´æŽ¥ä½¿ç”¨ã—ã¦ã„ãŸãŒã€ã“ã®ã‚¨ãƒ³ãƒˆãƒªã§ã¯JPAãƒ—ãƒãƒã‚¤ãƒ€ï¼ˆEclipseLink, Hibernateï¼‰å›ºæœ‰ã®APIã‚’ä½¿ç”¨ã—ã¦100ä¸‡è¡Œå–å¾—ã™ã‚‹ã‚³ãƒ¼ãƒ‰ã®é€Ÿåº¦ã‚’ã€ãƒ•ã‚§ãƒƒãƒã‚µã‚¤ã‚ºå¤‰æ›´ç„¡ã—ã¨100ã®æ™‚ã¨ã§ã©ã®ãã‚‰ã„é€Ÿåº¦å·®ãŒç”Ÿã˜ã‚‹ã‹ã‚’ç¢ºèªã™ã‚‹ã€‚ ç’°å¢ƒ DB CentOS-6.4-x86_64 Oracle Database Express Edition 11g Release 2 Java Java SE Development Kit 7u45 Eclipse Kepler(4.3.1) SR1 IDE for Java
maisenakajima 2013/12/25
JPA

Java

performance

database

programming

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Oracle WebLogic Serverãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®ãƒã‚¤ãƒ³ãƒˆ
Oracle WebLogic Serverãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®ãƒã‚¤ãƒ³ãƒˆ 1. Oracle WebLogic Server ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®ãƒã‚¤ãƒ³ãƒˆ æ—¥æœ¬ã‚ªãƒ©ã‚¯ãƒ«æ ªå¼ä¼šç¤¾ ã‚ªãƒ©ã‚¯ãƒ«ãƒ¦ãƒ‹ãƒãƒ¼ã‚·ãƒ†ã‚£ å²¡ç”° å¤§è¼” 2013å¹´11æœˆ27æ—¥ 1 Copyright Â© 2013, Oracle and/or its affiliates. All rights reserved. 2. ä»¥ä¸‹ã®äº‹é …ã¯ã€å¼Šç¤¾ã®ä¸€èˆ¬çš„ãªè£½å“ã®æ–¹å‘æ€§ã«é–¢ã™ã‚‹æ¦‚è¦ã‚’èª¬æ˜Žã™ã‚‹ã‚‚ã®ã§ ã™ã€‚ã¾ãŸã€æƒ…å ±æä¾›ã‚’å”¯ä¸€ã®ç›®çš„ã¨ã™ã‚‹ã‚‚ã®ã§ã‚ã‚Šã€ã„ã‹ãªã‚‹å¥‘ç´„ã«ã‚‚çµ„ã¿ è¾¼ã‚€ã“ã¨ã¯ã§ãã¾ã›ã‚“ã€‚ä»¥ä¸‹ã®äº‹é …ã¯ã€ãƒžãƒ†ãƒªã‚¢ãƒ«ã‚„ã‚³ãƒ¼ãƒ‰ã€æ©Ÿèƒ½ã‚’æä¾›ã™ ã‚‹ã“ã¨ã‚’ã‚³ãƒŸãƒƒãƒˆãƒ¡ãƒ³ãƒˆï¼ˆç¢ºç´„ï¼‰ã™ã‚‹ã‚‚ã®ã§ã¯ãªã„ãŸã‚ã€è³¼è²·æ±ºå®šã‚’è¡Œã†éš› ã®åˆ¤æ–ææ–™ã«ãªã•ã‚‰ãªã„ã§ä¸‹ã•ã„ã€‚ã‚ªãƒ©ã‚¯ãƒ«è£½å“ã«é–¢ã—ã¦è¨˜è¼‰ã•ã‚Œã¦ã„ã‚‹æ©Ÿ èƒ½ã®é–‹ç™ºã€ãƒªãƒªãƒ¼ã‚¹ãŠã‚ˆã³æ™‚æœŸã«ã¤ã„ã¦ã¯ã€å¼Šç¤¾ã®è£é‡ã«ã‚ˆã‚Šæ±ºå®šã•ã‚Œã¾ã™ ã€‚ O
maisenakajima 2013/12/20
Oracle

server

Java

performance

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TCP Fast Open â€“ Webã‚’é€Ÿãã™ã‚‹ãŸã‚ã«GoogleãŒã‚„ã£ã¦ã„ã‚‹ã“ã¨ Make the Web Faster 4 â€“
TCP Fast Open â€“ Webã‚’é€Ÿãã™ã‚‹ãŸã‚ã«GoogleãŒã‚„ã£ã¦ã„ã‚‹ã“ã¨ Make the Web Faster 4 â€“ Jxck HTTPã¯ã€ãã®ä¸‹å±¤ã«ã‚ãŸã‚‹ãƒˆãƒ©ãƒ³ã‚¹ãƒãƒ¼ãƒˆãƒ¬ã‚¤ãƒ¤ãƒ¼ã®ãƒ—ãƒãƒˆã‚³ãƒ«ã¨ã—ã¦ã€é€šå¸¸TCPã‚’ä½¿ç”¨ã—ã¾ã™ã€‚ ã—ãŸãŒã£ã¦ã€TCPã®ãƒ¬ã‚¤ãƒ¤ã§é€Ÿåº¦ãŒæ”¹å–„ã™ã‚‹ã“ã¨ã¯ã€ãã®ã¾ã¾Webã®é«˜é€ŸåŒ–ã«ã¤ãªãŒã‚‹å¯èƒ½æ€§ãŒã‚ã‚‹ã¨ã„ãˆã¾ã™ã€‚ Googleã¯Webã‚’é€Ÿãã™ã‚‹ãŸã‚ã®æ´»å‹•ã¨ã—ã¦ã€TCPã®ã‚ˆã†ãªãƒ—ãƒãƒˆã‚³ãƒ«ãƒ¬ã‚¤ãƒ¤ã®æ”¹å–„ã«ã‚‚å–ã‚Šçµ„ã‚“ã§ã„ã¾ã™ã€‚ ä»Šå›žã¯ãã®ä¸ã®ä¸€ã¤ã€TCP Fast Openã‚’å–ã‚Šä¸Šã’ã€è§£èª¬ã¨å‹•ä½œæ¤œè¨¼ã€ç°¡å˜ãªãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã‚’è¡Œã„ã¾ã™ã€‚ æ¤œè¨¼ç’°å¢ƒç‰ã¯æœ€ä¸‹éƒ¨ã«è¨˜è¼‰ã—ã¾ã™. Make the Web Faster: TCP Fast Open 3 Way Handshake TCPã¯ã€ã€Œæ£ç¢ºã€ç¢ºå®Ÿã«ãƒ‡ãƒ¼ã‚¿ã‚’å±Šã‘ã‚‹ã€ã“ã¨ã‚’é‡è¦–ã—ãŸè¨è¨ˆã«ãªã£ã¦ã„ã¾ã™ã€‚ ç‰¹ã«æŽ¥ç¶šç¢ºç«‹æ™‚ã«ã¯ã€åŒæ–¹ã®çŠ¶
maisenakajima 2013/12/14
tcp

HTTP

ip

google

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Network

performance
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1