Improving key expiration in Redis
Recently, we had an interesting issue where we ran into some performance issues in our Redis clusters. After a lot of time spent debugging and testing we were able to reduce Redis’s memory use in some of our clusters by up to 25% with changes to key expiration. Internally Twitter runs multiple cache services. One of them is backed by Redis. Our Redis clusters store data for some Twitter’s most imp
cachectld〜無駄ãªãƒšãƒ¼ã‚¸ã‚ャッシュã®å‰Šé™¤ã‚’自動化〜 | メルカリエンジニアリング
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Part 2: Lessons learned tuning TCP and Nginx in EC2 « Chartbeat Engineering Blog
Part 2: Lessons learned tuning TCP and Nginx in EC2 February 12th, 2014 by Justin EDIT 2/20/14: Updated to reflect correct response time metric In part 1 of our post, one of the items we discussed was our issues with using DNS as a load balancing solution.  To recap, at the end of our last post we were still setup with Dyn’s load balancing solution and our servers were receiving a disproportionate
MySQL 5.6ã®ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«å¾Œã«ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã™ã¹ãé …ç›® | Yakst
MySQLコミュニティマãƒãƒ¼ã‚¸ãƒ£ã®Morgan Tockeræ°ã«ã‚ˆã‚‹ã€MySQL 5.6をインストールã—ãŸå¾Œã«ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆå€¤ã‹ã‚‰å¤‰æ›´ã—ãŸæ–¹ãŒã‚ˆã„パラメータã®è§£èª¬ã€‚ 数々ã®ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆå€¤ã®æ”¹å–„ã«ã‚ˆã£ã¦ã€éŽåŽ»ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¨æ¯”ã¹ã¦MySQL 5.6ã§ã¯è¨å®šã—ãªãã¦ã¯ãªã‚‰ãªã„値ãŒã‹ãªã‚Šæ¸›ã£ãŸã€‚ã¨ã¯è¨€ãˆã€å¤‰æ›´ã™ã¹ãã‚‚ã®ã«ã¤ã„ã¦ã“ã“ã§æ›¸ã„ã¦ãŠããŸã„。 InnoDBã®è¨å®š innodb_buffer_pool_size - デフォルトã¯128M。ã“ã‚Œã¯ã€ãƒ¡ãƒ¢ãƒªã«ãƒãƒ¼ãƒ‰ã•ã‚Œã‚‹ãƒ‡ãƒ¼ã‚¿ã¨ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã®ãŸã‚ã«InnoDBãŒã©ã®ãらã„メモリを使ã†ã‹ã‚’指定ã™ã‚‹ã‚‚ã®ãªã®ã§ã€è¨å®šã™ã¹ãé‡è¦ãªå€¤ã 。MySQLã®å°‚用サーãƒãªã‚‰ã€æ載ã•ã‚Œã¦ã„るメモリã®50%ã‹ã‚‰80%ãŒæŽ¨å¥¨ã•ã‚Œã‚‹è¨å®šå€¤ã 。例ãˆã°ã€64GBã®RAMã‚’æ載ã—ã¦ã„るサーãƒãªã‚‰ã€ãƒãƒƒãƒ•ã‚¡ãƒ—ールã¯50GB程度ã«ã™ã¹ãã ã‚ã†ã€‚ innodb_log_file_size -
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Performance benchmarking Socket.io 0.8.7, 0.7.11 and 0.6.17 and Node's native TCP
I've been working with Socket.io quite a bit recently. It's a great library. However, after upgrading to 0.8.x, I ran into problems with increased CPU usage. Since performance is very important for high traffic pubsub implementations, I decided to investigate this further - and try to quantify the performance impact of upgrading to a newer version of Socket.io. I wrote a benchmarking suite (sioben
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The open source dynamic scripting language PHP is widely deployed across the Web, powering countless Web sites (including the Internet.com network). Now Facebook is aiming to change the game with today’s release of a major new PHP effort called HipHop. With HipHop, Facebook is providing a new runtime that is intended to improve PHP use in large-scale deployments. The HipHop effort, which also incl
Page Speed Home
Getting started Download Page Speed. Run Page Speed against your web pages. Read about the Page Speed performance best practices. What is Page Speed? Page Speed is an open-source Firefox/Firebug Add-on. Webmasters and web developers can use Page Speed to evaluate the performance of their web pages and to get suggestions on how to improve them. How does Page Speed work? Page Speed performs several
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Savoy » My iPhone is not a Mac Pro
This article is about enhancing the performance of iPhone applications using the power of Objective C++. By discussing a real-world problem from Savoy’s Spots application, the article shows the necessary optimizations to make the program run smoothly in three steps. Using Objective C++ to enhance the performance of iPhone applications. One thing I really like about software development is, that th
Happy Optimization - kazuho
2008-07-24 coderepos conference #1マイリスト: mylist/7688389
ActionScript3 最é©åŒ–・高速化Tips 簡易ã¾ã¨ã‚ - actionscriptグループ - ConquestArrow.addEventListener( LifeEvent.WORK, this.studyActionScript);
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