[B! connection] yassã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

yass id:yass

connectionã«é–¢ã™ã‚‹yassã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (47)

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ã€AWSã€‘ALBã‹ã‚‰CLIã§EC2åˆ‡ã‚Šé›¢ã—deregister-targetsã¯Gracefulã˜ã‚ƒãªã„? - YOMON8.NET
ALBã‹ã‚‰EC2ã‚’åˆ‡ã‚Šé›¢ã™æ™‚ã«ä½¿ã† aws elbv2 deregister-targets ã®ã‚³ãƒžãƒ³ãƒ‰ã€å¤§é‡ã®ã‚¢ã‚¯ã‚»ã‚¹ãŒã‚ã£ã¦ã‚‚ã‚¨ãƒ©ãƒ¼ã‚’è¿”ã™ã“ã¨ãªãåˆ‡ã‚Šé›¢ã™ã“ã¨ãŒã§ãã‚‹ã¨æ€ã£ã¦ã„ã¾ã—ãŸã€‚ â‘ EC2ã‚’ALBã‚ˆã‚Šåˆ‡ã‚Šé›¢ã— aws elbv2 deregister-targets --target-group-arn target_group_arn --targets Id=i-xxxxxx,Port=80 â‘¡ã‚¹ãƒ†ãƒ¼ã‚¿ã‚¹ç¢ºèª healthy -> draining -> unused ã¨çŠ¶æ…‹ãŒé·ç§»ã™ã‚‹ã®ã‚’å¾…ã¤ã€‚ â‘¢ EC2ã‚’ALBã«ç™»éŒ² aws elbv2 describe-target-health --target-group-arn target_group_arn --targets Id=i-xxxxxx,Port=80 ä½•åº¦ã‚‚ãƒ†ã‚¹ãƒˆã—ã¾ã—ãŸãŒâ‘ ã®éƒ¨åˆ†ã§ 502 ã‚¹ãƒ†ãƒ¼ã‚¿ã‚¹ãŒè¿”ã£
yass 2017/09/08
alb

elb

connection
ãƒªãƒ³ã‚¯
HTTP/2 connection coalescing | daniel.haxx.se
Section 9.1.1 in RFC7540 explains how HTTP/2 clients can reuse connections. This is my lengthy way of explaining how this works in reality. Many connections in HTTP/1 With HTTP/1.1, browsers are typically using 6 connections per origin (host name + port). They do this to overcome the probl ems in HTTP/1 and how it uses TCP â€“ as each connection will do a fair amount of waiting. Plus each connection
yass 2017/08/29
HTTP2

multiplexing

connection

browser
ãƒªãƒ³ã‚¯
GitHub - google/tcp_killer: Shuts down a TCP connection on Linux or macOS. Local and remote endpoint arguments can be copied from the output of 'netstat -lanW'.
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yass 2017/07/09
tcp

connection

socket
ãƒªãƒ³ã‚¯
AWS ec2 t2ã‚¿ã‚¤ãƒ—ã«ã¯51300ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã—ã‹ç¹‹ãŒã‚‰ãªã„ - Qiita
2017/6/26è¿½è¨˜ã€€ã™ã¿ã¾ã›ã‚“ã€‚è¿½è©¦ã‚’ã—ãŸã‚‰51300ã§ã®é™ç•ŒãŒç¢ºèªã§ããŸã®ã¯t2.mediumã¾ã§ã§ã—ãŸã€‚ãŸã ã—ã€t2.largeã§ã‚‚ç´„8ä¸‡ã®é™ç•ŒãŒã‚ã‚‹ã‚ˆã†ã§ã™ã€‚4ç« ã€5ç« ã‚’ä¿®æ£ã—ã¾ã—ãŸã€‚ 2017/6/27è¿½è¨˜ã€€Developer Forumsï¼ˆç±³ï¼‰ã«è³ªå•ã‚’ã—ãŸã¨ã“ã‚ã€åŽŸå› ä¸æ˜Žã ãŒm4ã‚·ãƒªãƒ¼ã‚ºã§ã‚‚10ä¸‡ä»¥ä¸Šã§é™ç•Œå€¤ã‚’ç¢ºèªã—ãŸã¨ã„ã†å ±å‘ŠãŒã‚ã‚Šã¾ã—ãŸã€‚ã©ã†ã‚‚AWSç‰¹æœ‰ã®ã‚¢ãƒ³ãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆãªç¾è±¡ã‚‰ã—ã„ã¨ã®ã“ã¨ã€‚ ã“ã®è¨˜äº‹ã§ã¯AWS ec2ä¸Šã®CentOS7ã«ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—ãŸGo1.8ã‚’ä½¿ã£ã¦ã„ã¾ã™ã€‚ AWS ec2ã®t2ã‚¿ã‚¤ãƒ—ã«ã¯51300ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã—ã‹ç¹‹ãŒã‚‰ãªã„ã‚ˆã†ã§ã™ã€‚ã©ã®ãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã‚’è¦‹ã¦ã‚‚ã“ã®ã‚ˆã†ãªä»•æ§˜ã¯æ›¸ã‹ã‚Œã¦ã„ã¾ã›ã‚“ã€‚åŽŸå› ã¯ä¸æ˜Žã§ã—ãŸãŒã€äº‹å®Ÿé–¢ä¿‚ã‚’é›†ã‚ãŸã„ã®ã§ã€åŒæ„éžåŒæ„ã«ã‚ˆã‚‰ãšã«åºƒãã‚³ãƒ¡ãƒ³ãƒˆã„ãŸã ããŸã„ã§ã™ã€‚ ã„ã‚ã„ã‚åˆ‡ã‚Šåˆ†ã‘ã‚’ç¹°ã‚Šè¿”ã—ãŸã®ã§ã€ã€ŒCentOS7ã§ã®å¤§è¦æ¨¡ã‚µãƒ¼
yass 2017/06/28
ec2

connection
ãƒªãƒ³ã‚¯
GitHub - cfsego/nginx-limit-upstream: limit the number of connections to upstream for NGINX
yass 2017/03/28
nginx

proxy

connection
ãƒªãƒ³ã‚¯
Tuning Tomcat For A High Throughput, Fail Fast System
by Sumit Tandon Probl em Netflix has a number of high throughput, low latency mid tier services. In one of these services, it was observed that in case there is a huge surge in traffic in a very short span of time, the machines became cpu-starved and would become unresponsive. This would lead to a bad experience for the clients of this service. They would get a mix of read and connect timeouts. Read
yass 2017/03/24
tomcat

connection

backlog
ãƒªãƒ³ã‚¯
GitHub - brettwooldridge/HikariCP: å…‰ HikariCPãƒ»A solid, high-performance, JDBC connection pool at last.
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yass 2015/02/14
Java

JDBC

connection pooling

connection
ãƒªãƒ³ã‚¯
java-mysql-namelocker ãŒå‡ºã¦ã„ãŸ - ãã®æ‰‹ã®å¹³ã¯å°»ã‚‚ã¤ã‹ã‚ã‚‹ã•
ãã†ã„ãˆã° java-mysql-namelocker ãŒå‡ºã¦ã„ã¾ã—ãŸï¼ŽMaven Central ã«ã‚‚ãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¦ã„ã¾ã™ï¼Ž http://search.maven.org/#artifactdetails%7Cnet.moznion%7Cmysql-namelocker%7C1.0.0%7Cjar Perlã«ã¯ Mysql::NameLocker ã¨ã„ã†ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ãŒå¤ãã‹ã‚‰ã‚ã‚Šï¼Œã“ã®Javaã®ãƒ‘ãƒƒã‚±ãƒ¼ã‚¸ã¯ãã®ç§»æ¤ç‰ˆã«ãªã‚Šã¾ã™ï¼Ž ä½•ã‚’ã™ã‚‹ãƒ‘ãƒƒã‚±ãƒ¼ã‚¸ã‹ã¨è¨€ã†ã¨ï¼ŒMySQL ã® GET_LOCK() ã‚’ç”¨ã„ã¦ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã¨ç´ä»˜ã„ãŸåå‰ä»˜ããƒãƒƒã‚¯ã‚’å–å¾—ã—ï¼Œtry-with-resources ã®ã‚¹ã‚³ãƒ¼ãƒ—ã‚’æŠœã‘ãŸæ™‚ã«è‡ªå‹•çš„ã« RELEASE_LOCK() ã‚’ç™ºè¡Œã—ã¦ãƒãƒƒã‚¯ã‚’è§£é™¤ã™ã‚‹ã¨ã„ã†ã‚·ãƒ³ãƒ—ãƒ«ãªãƒ‘ãƒƒã‚±ãƒ¼ã‚¸ã¨ãªã£ã¦ã„ã¾ã™ï¼Žæˆ–ã‚‹ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒãƒãƒƒã‚¯ã‚’å–å¾—ã—ã¦ã„ã‚‹é–“ã¯ï¼Œä»–ã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã¯åŒã˜åå‰ã§ã
yass 2015/01/03
" æˆ–ã‚‹ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒãƒãƒƒã‚¯ã‚’å–å¾—ã—ã¦ã„ã‚‹é–“ã¯ï¼Œä»–ã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã¯åŒã˜åå‰ã§ãã®ãƒãƒƒã‚¯ã‚’å–å¾—ã§ããªã„ (AlreadyLockedExceptionÂ ãŒè¿”ã£ã¦ãã‚‹) ã®ã§ï¼Œã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã¨åå‰ã«å¿œã˜ãŸæŽ’ä»–å‡¦ç†ã‚’ãŠæ‰‹è»½ã«å®Ÿç¾ã™ã‚‹ã“ã¨ãŒå¯èƒ½ã¨ "

mysql

java

connection

lock
ãƒªãƒ³ã‚¯
Yakst - max_user_connectionsã‚’è¨å®šã—ã¦ã€MySQLã®ãƒ€ã‚¦ãƒ³ã‚¿ã‚¤ãƒ ã‚’å›žé¿ã—ã‚ˆã†
MySQL Performance Blogã®ç¿»è¨³ã€‚ãƒ¦ãƒ¼ã‚¶ã‚¢ã‚«ã‚¦ãƒ³ãƒˆã”ã¨ã«ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³æ•°ã‚’åˆ¶é™ã§ãã‚‹max_user_connectionsã‚’åˆ©ç”¨ã—ã¦ã€ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³æ•°ä¸è¶³ã‚’å›žé¿ã™ã‚‹æ–¹æ³•ã¨ã€ãã®åˆ©ç‚¹ã«ã¤ã„ã¦è§£èª¬ã™ã‚‹ã€‚ July 29, 2014 by Peter Zaitsev MySQLã®ãƒ€ã‚¦ãƒ³ã‚¿ã‚¤ãƒ ç™ºç”Ÿã®ã€ã‚ˆãã‚ã‚‹åŽŸå› ã®ä¸€ã¤ã¯ã€ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³æ•°ãŒä¸è¶³ã™ã‚‹ã“ã¨ã ã€‚ã“ã‚“ãªã‚¨ãƒ©ãƒ¼ã‚’è¦‹ãŸã“ã¨ã¯ãªã„ã ã‚ã†ã‹ï¼Ÿ ERROR 1040 (00000): Too many connections MySQLã‚’ã‚ã‚‹ç¨‹åº¦é•·ãè§¦ã£ã¦ã„ã‚‹äººãªã‚‰ã€é–“é•ã„ãªãè¦‹ãŸã“ã¨ãŒã‚ã‚‹ã ã‚ã†ã€‚æˆåŠŸã—ãŸãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³ã¨å¤±æ•—ã—ãŸãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³ãŒæ··ã˜ã£ã¦ä¸€æ™‚çš„ã«è¦‹ãˆã‚‹ã‚¨ãƒ©ãƒ¼ãŒç™ºç”Ÿã—ãŸã‚Šã€ã—ã£ã‹ã‚Šç›£è¦–ã—ã¦ã„ãªã„å ´åˆã«é™ã£ã¦ã€ã„ãã¤ã‹ã®ãƒ—ãƒã‚»ã‚¹ãŒæ£å¸¸ã«å®Ÿè¡Œã•ã‚Œãšè‰²ã€…ãªãŠã‹ã—ãªç¾è±¡ã‚’å¼•ãèµ·ã“ã—ãŸã‚Šã€ãªã‹ãªã‹ã«åŽ„ä»‹ãªã‚¨ãƒ©ãƒ¼ã ã€‚ ã‚³ãƒã‚¯ã‚·ãƒ§
yass 2014/08/03
" ã“ã“ã§ã€ãƒ™ã‚¿ãƒ¼ãªæ–¹æ³•ã‚’ææ¡ˆã—ã‚ˆã†ã€‚ã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚„ã‚¢ã‚«ã‚¦ãƒ³ãƒˆã”ã¨ã«ãƒ¦ãƒ¼ã‚¶ã‚¢ã‚«ã‚¦ãƒ³ãƒˆã‚’ä½¿ã„åˆ†ã‘ã€ãã‚Œãžã‚Œã«ãƒªã‚½ãƒ¼ã‚¹åˆ¶é™ã‚’ã‹ã‘ã‚‹ã®ã ã€‚å…·ä½“çš„ã«ã¯ã€max_user_connectionsã‚’è¨å®šã™ã‚Œã°ã„ã„ã€‚"

mysql

connection
ãƒªãƒ³ã‚¯
Number Of Database Connections - PostgreSQL wiki
You can often support more concurrent users by reducing the number of database connections and using some form of connection pooling. This page attempts to explain why that is. Summary A database server only has so many resources, and if you don't have enough connections active to use all of them, your throughput will generally improve by using more connections. Once all of the resources are in us
yass 2014/02/24
" A formula which has held up pretty well across a lot of benchmarks for years is that for optimal throughput the number of active connections should be somewhere near ((core_countÂ * 2) +Â effective_spindle_count). Core count should not include HT threads, even if hyperthreading is enabled.Â "

postgresql

connection
ãƒªãƒ³ã‚¯
Google Code Archive - Long-term storage for Google Code Project Hosting.
Code Archive Skip to content Google About Google Privacy Terms
yass 2014/02/15
" Vibur DBCP is a concurrent,Â fastÂ and fully-featured JDBC connection pool based on JavaÂ dynamic proxies. It supports a fairness parameter, statement caching, SQL queries logging, and Hibernate integration, among other features. "

jdbc

java

connection

pooling

database
ãƒªãƒ³ã‚¯
RDBMSã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãƒ—ãƒ¼ãƒªãƒ³ã‚°ã¨ã‹ãã®è¾ºã®è©± - wyukawa's diary
ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹æŠ€è¡“ã®ç¾…é‡ç›¤ from Yoshinori Matsunobu ã“ã‚Œã¯ç´ æ™´ã‚‰ã—ã„è³‡æ–™ã§å¾ŒåŠã®ã‚ãƒ£ãƒªã‚¢ã®è©±ã¨ã‹é¢ç™½ã„ã‚“ã ã‘ã©ã€ä»Šå›žæ›¸ãã®ã¯p6,p8ã«æ›¸ã‹ã‚Œã¦ã„ãŸä¸‹è¨˜ã®è©±ã§ã™ã€‚ PosgreSQLã¯æŽ¥ç¶šãŒãƒ—ãƒã‚»ã‚¹ãƒ™ãƒ¼ã‚¹ãªã®ã§LLè¨€èªžã¨ã®ç›¸æ€§ãŒã‚ˆããªã„ Pgpool(ã“ã‚Œã¯ãƒ—ãƒã‚ã‚·ã‚µãƒ¼ãƒãƒ¼çš„ã«ä½¿ã†ã‚‰ã—ã„)ãªã©ã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãƒ—ãƒ¼ãƒ«ã¨ä½µç”¨ã™ã‚‹ã“ã¨ãŒå¤šã„ MySQLã¯æŽ¥ç¶šãŒã‚¹ãƒ¬ãƒƒãƒ‰ãƒ™ãƒ¼ã‚¹ãªã®ã§ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãƒ—ãƒ¼ãƒªãƒ³ã‚°ãŒä½¿ã„ã¥ã‚‰ã„LLè¨€èªžç’°å¢ƒã§ã¯é…åŠ› ãªã‚“ã§LLè¨€èªžã ã¨ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãƒ—ãƒ¼ãƒªãƒ³ã‚°ãŒä½¿ã„ã¥ã‚‰ã„ã®ã‹ã‚ã‹ã‚‰ãšã¤ã¶ã‚„ã„ãŸã‚‰ãƒªãƒ—ãƒ©ã‚¤ã‚‚ã‚‰ã£ã¦ã¤ã„ã§ã«ã¡ã‚‡ã£ã¨å‰ã«è©±é¡Œã«ãªã£ãŸRDBMSã§ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãƒ—ãƒ¼ãƒ«ãŒå¿…è¦ãªç†ç”±ã€ã‚ã‹ã‚‰ãªã„ã€‚ - Togetterã‚„7å¹´å‰ã®ãƒ–ãƒã‚°ã‚¨ãƒ³ãƒˆãƒªã§ã‚ã‚‹ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãƒ—ãƒ¼ãƒªãƒ³ã‚°ã®è©± - naoyaã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼ã‚’èªã¿è¿”ã—ã¦ã¿ã¦æ€ã£ãŸã“ã¨ã‚’æ›¸ã„ã¦ã¿ã‚‹ã€‚å…¨ç„¶ã¾ã¨ã¾ã£ã¦
yass 2013/11/17
database

connection

pooling
ãƒªãƒ³ã‚¯
HttpClientã¨ConnectionManagerã¨CLOSE_WAITã¨ - CLOVERðŸ€
Javaã§HTTPé€šä¿¡ã‚’ã‚„ã‚ã†ã¨ã™ã‚‹ã¨ã€å¿…ãšã¨è¨€ã£ã¦ã„ã„ã»ã©ç™»å ´ã™ã‚‹ã€Apache HttpClient4ï¼ˆä»¥å‰ã¯ã€Jakarta Commons HttpClient3ï¼‰ã§ã™ãŒã€ã“ã‚Œã§ã¡ã‚‡ã£ã¨ãƒãƒžã£ã¦ã„ãŸäº‹è±¡ã‚’è¦‹ã‹ã‘ãŸã®ã§ã€è»½ããƒ¡ãƒ¢ã‚’ã€‚ ã‚ã€ãã®æ™‚ã«ä½¿ã‚ã‚Œã¦ã„ãŸã®ã¯ã€Jakarta Commons HttpClient3ã®æ–¹ã§ã™ã€‚ã‚“ã§ã€ã‚½ã‚±ãƒƒãƒˆã®ã‚¯ãƒãƒ¼ã‚ºæ¼ã‚Œã§ãƒãƒžã£ã¦ã¾ã—ãŸã€‚ ã“ã‚Œã€ãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ«ã ã‘ã‚’ä¿¡ã˜ã¦å®Ÿè£…ã™ã‚‹ã¨ã€ãƒãƒžã‚‹ã‚“ã§ã™ã‚ˆãã‡â€¦ã€‚ http://hc.apache.org/httpclient-3.x/tutorial.html ãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ«ã®ä¸ã« // Release the connection. method.releaseConnection(); ã¿ãŸã„ãªã“ã¨ãŒæ›¸ã„ã¦ã‚ã£ã¦ã€ã„ã‹ã«ã‚‚ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’ã‚¯ãƒãƒ¼ã‚ºã—ã¦ãã‚Œãã†ãªé›°å›²æ°—ãŒã‚ã‚Šã¾ã™ãŒã€ã“ã‚Œã¯æ„å‘³ãŒé•ã„ã¾ã™ã€‚Ht
yass 2013/11/12
"ã„ã‹ã«ã‚‚ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’ã‚¯ãƒãƒ¼ã‚ºã—ã¦ãã‚Œãã†ãªé›°å›²æ°—ãŒã‚ã‚Šã¾ã™ãŒ / HttpClientãŒæŒã¤ã€HttpConnectionManagerã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ã«ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’è¿”å´ã—ã¾ã™ã‚ˆã€ã¨ã„ã†æ„å‘³ã§ã‚ã£ã¦ã€åˆ¥ã«ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’é–‰ã˜ã¦ãã‚Œã‚‹ã‚ã‘ã§ã¯ãªã„"

java

http

HttpClient

socket

connection

close
ãƒªãƒ³ã‚¯
Linuxï¼šOSã®tcpã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆã®ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆå€¤ã«ã¤ã„ã¦ - HiiHahWIKI - making some notes for... -
Linuxï¼šOSã®tcpã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆã®ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆå€¤ã«ã¤ã„ã¦ â€ ä¾‹ãˆã°ã€curlã‚’ä½¿ç”¨ã—ã¦ã€ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆå€¤ã‚’300ç§’ã«æŒ‡å®šã—ã€ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆã•ã›ã‚‹ã‚ˆã†ç„¡ã„ã“ã¨ã‚’ã—ã¦ã‚‚ã€å®Ÿéš›180ç§’ã‚’è¶…ãˆãŸãã‚‰ã„ã§ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆã™ã‚‹äº‹è±¡ãŒç™ºç”Ÿã—ã¦ã„ã¾ã—ãŸã€‚ ã“ã‚ŒãŒã€curlã ã‘ã˜ã‚ƒãªãã¦ã€ä¾‹ãˆã°apacheã®mod_proxy_balancerã®ãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰ã‚µãƒ¼ãƒã¸ã®ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆã«ã¤ã„ã¦ã‚‚ã€ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆå€¤ã‚’300ç§’ã¨ã‹ã§ã›ã£ã¦ã„ã—ã¦ã‚‚ã€å®Ÿéš›ã¯180ç§’ã¡ã‚‡ã„ã§ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆã—ã¦ã—ã¾ã£ã¦ã„ã¾ã—ãŸã€‚ ã“ã‚Œã«ã¤ã„ã¦ã€ã¡ã‚‡ã£ã¨èª¿ã¹ãŸã¨ã“ã‚ã©ã†ã‚‚Linuxã®OSã¨ã—ã¦æŒã£ã¦ã„ã‚‹TCPã®ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆå€¤ãŒåŠ¹ã„ã¦ã„ã‚‹ã‚ˆã†ã ã€ã¨ã„ã†ã“ã¨ãŒã‚ã‹ã‚Šã¾ã—ãŸã€‚ ã“ã“ã‚’è¦‹ã‚‹ã¨åˆ†ã‹ã‚Šã¾ã™ã€‚ #cat /proc/sys/net/ipv4/tcp_syn_retries 5 ã“ã‚Œã¯tcpã®synã‚’é€ä¿¡ã™ã‚‹ãƒªãƒˆãƒ©ã‚¤å›žæ•°ã¿ãŸã„ã§ã€ä»¥ä¸‹ã®ãƒã‚¸ãƒƒã‚¯ã§ãƒªãƒˆ
yass 2013/11/10
" ä¾‹ãˆã°ã€curlã‚’ä½¿ç”¨ã—ã¦ã€ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆå€¤ã‚’300ç§’ã«æŒ‡å®šã—ã€ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆã•ã›ã‚‹ã‚ˆã†ç„¡ã„ã“ã¨ã‚’ã—ã¦ã‚‚ã€å®Ÿéš›180ç§’ã‚’è¶…ãˆãŸãã‚‰ã„ã§ã‚¿ã‚¤ãƒ ã‚¢ã‚¦ãƒˆã™ã‚‹äº‹è±¡ãŒç™ºç”Ÿã—ã¦ã„ã¾ã—ãŸã€‚"

tcp

linux

timeout

connection
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DBCP ã‚ˆã‚Š 50å€æ—©ã„ï¼ï¼Ÿ BoneCP ã‚’ä½¿ã£ã¦é«˜é€Ÿã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãƒ»ãƒ—ãƒ¼ãƒªãƒ³ã‚°ã‚’å®Ÿç¾ã™ã‚‹æ–¹æ³• : NETBUFFALO
import java.sql.Connection; import java.sql.SQLException; import com.jolbox.bonecp.BoneCP; import com.jolbox.bonecp.BoneC PConfig; public class MyBoneCPApp { private BoneCP bcp = null; private String driverClassName = "com.mysql.jdbc.Driver"; private String username = "root"; private String password = ""; private String url = "jdbc:mysql://localhost/test"; public void init() throws ClassNotFoundExc
yass 2013/11/08
java

database

jdbc

connection

pooling
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Erlang: WhatsAppã‚’æ”¯ãˆã‚‹æŠ€è¡“ - ãƒ¯ã‚¶ãƒŽãƒ | wazanova.jp
[Video]Â http://vimeo.com/44312354#at=0 [Slide]Â http://www.erlang-factory.com/upload/presentations/558/efsf2012-whatsapp-scaling.pdf WhatsAppã¯æ—¥æœ¬ã§ã„ã†ã¨ã“ã‚ã®Lineã«ã‚ãŸã‚‹ã‚µãƒ¼ãƒ“ã‚¹ã§ã—ã‚‡ã†ã‹ã€‚ã“ã®ãƒ‹ãƒ¥ãƒ¼ã‚¹ã«ã‚ˆã‚‹ã¨ã€WhatsApp: æœˆé–“UUï¼“å„„ã€WeChat: æœˆé–“UU2.3å„„ã€Skype: æœˆé–“UU2.8å„„ã€Line: ç™»éŒ²ï¼’å„„ (UUã¯ç™ºè¡¨ã—ãªã„ã‚“ã§ã™ãã€‚ã€‚) ã¨ã„ã†ã“ã¨ã§ã™ã‹ã‚‰ã€ç›¸å½“ã§ã‹ã„ã§ã™ãã€‚ æ˜¨å¹´ã«ãªã‚Šã¾ã™ãŒã€Rick Reed (WhatsApp <- Yahoo! <- SGI)ãŒã€åŒã‚µãƒ¼ãƒ“ã‚¹ã‚’æ”¯ãˆã‚‹ã€æ•°ç™¾ä¸‡ãƒ¦ãƒ¼ã‚¶ã®åŒæ™‚æŽ¥ç¶šã‚·ã‚¹ãƒ†ãƒ ã«ã¤ã„ã¦ã€SanFranciscoã®Erlangã®ã‚«ãƒ³ãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã§èªžã£ã¦ã¾ã™ã€‚ ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã®ãƒˆãƒ©ãƒ•ã‚£
yass 2013/10/10
" Erlangã¯SMPã®ã‚¹ã‚±ãƒ¼ãƒ©ãƒ“ãƒªãƒ†ã‚£ãŒã™ã”ã„ã€‚24å€‹ã®ãƒã‚¸ã‚«ãƒ«CPUã§ä½¿ç”¨çŽ‡85%è¶…ã€‚FreeBSDã¨ã®ç›¸æ€§ã‚‚ã„ã„ã€‚CPUä½¿ç”¨çŽ‡ã¨ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³æ•°ã®å¢—åŠ ãŒãƒªãƒ‹ã‚¢ã«ã‚ãŒã£ã¦ã„ãã€‚"

erlang

c10k

connection

concurrency
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Redis on EC2
Amazon Redshiftã®é–‹ç™ºè€…ãŒã“ã‚Œã ã‘ã¯çŸ¥ã£ã¦ãŠããŸã„10ã®TIPS / ç¬¬18å›ž AWS User Group - Japan Koichi Fujikawa
yass 2013/10/04
redis

aws

ec2

connection

timeout
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DMM inside
ãªã›ã‚™DMMã‹ã‚™web3ã«å‚å…¥ã—ãŸã®ã‹ã€‚Seamoon Protocolã‹ã‚™ç›®æŒ‡ã™æ–°ãŸãªã‚¨ãƒ³ã‚¿ãƒ¡ä½“é¨“ã®æœªæ¥ã¨ã¯
yass 2013/09/19
" conntrackã‚³ãƒžãƒ³ãƒ‰ãŒã‚ã‚Œã°å„ªå…ˆã—ã¦åˆ©ç”¨ã—ã€ãªã‚‹ã¹ãcatã‚’åˆ©ç”¨ã—ãªã„ã‚ˆã†ãªè¨è¨ˆã«ãªã£ã¦ã„ã‚‹ã‚“ã ã¨ / ä»Šå¾Œã¯é«˜è² è·ãªã‚µãƒ¼ãƒã§conntrackãƒ†ãƒ¼ãƒ–ãƒ«ã‚’ç›£è¦–ã™ã‚‹å ´åˆã¯conntrackã‚³ãƒžãƒ³ãƒ‰ã‚’ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—ã‚ˆã†ã‹ãªã¨æ€ã£ã¦ã„ã¾ã™ã€‚"

iptables

connection
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C500k in Action at Urban Airship
Mike Herrick SVP of Product & Engineering Published on 24 Aug 2010 Like the idea of working on large scale probl ems? Weâ€™re always looking for talented engineers, and would love to chat with you â€“ check it out! Building AirMail Push for Androidâ€™s Infrastructure Weâ€™ve been working to develop AirMail Push for Android, our push platform, along with a supporting server-side infrastructure that can hand
yass 2013/08/16
" the failure modes we saw in both the Java + Netty and Scala + Netty were unusual / we pressed on with a Java + Pure NIO implementation. "

java

nio

netty

scala

connection

socket

c10k
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é–¢æ•°åž‹è¨€èªžã¨ä¸¦è¡Œå‡¦ç† Haskellã§ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚° 2013.5.24 å±±æœ¬å’Œå½¦
1 Haskell 2013.5.24 2 3 1988 B4 Sun 1992 4 Unix Magazine Unix Magazine UNIX RFC FYI (For Your Information) 5 IP PEM (Privacy Enhanced Mail) WIDE Project mh-e PEM 6 7 Unix Magazine PGP PGP 1 8 Mew (MIME) Mew Emacs Emacs XEmacs 9 Emacs Mew off Mew Emacs read-passwd gnu.org 10 IIJ KAME IIJ 11 KAME KAME WIDE BSD IPv6 IPsec Mobile IPv6 IIJ NEC BSD IPv6 IPsec Mobile IPv6 Mac IPv6 KAME 12 IETF Internet E
yass 2013/05/25
haskell

concurrency

functional

thread

event driven

iij

c10k

connection
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