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LSI Logic SCSI RAIDコントãƒãƒ¼ãƒ©(MegaRAID 320-2x)ã®å‚¾å‘ã¾ã¨ã‚ - Windows Live
ã¾ãšã¯ã‚·ãƒ¼ã‚±ãƒ³ã‚·ãƒ£ãƒ«R/W時ã®ã‚¹ãƒˆãƒ©ã‚¤ãƒ—ディスク数ã«ã‚ˆã‚‹æ€§èƒ½å¤‰åŒ–ã‚’ã€ãã‚Œãžã‚Œèªã¿æ›¸ã性能(MB/sec)・ストレージ全体ã®èªã¿æ›¸ã回数(IOPS)・ディスク１本ã‚ãŸã‚Šã®èªã¿æ›¸ã回数(IOPS per Disks)をグラフ化ã—ã¦ã¿ã‚‹ã€‚(横軸ã¯ãƒ‡ã‚£ã‚¹ã‚¯æ•°; 10本ã®æ™‚ã¯ã©ã†ã‚‚調åãŒæ‚ªã‹ã£ãŸãŒãã®ã¾ã¾ã«ã—ã¦ã‚ã‚‹) èªã¿æ›¸ã性能ã®ã‚°ãƒ©ãƒ•ã‹ã‚‰ã€ã ã„ãŸã„220MB/sec程度ã§èªã¿æ›¸ãã¨ã‚‚ã«é 打ã¡ã«ãªã£ã¦ã„る。 ã“ã‚Œã¯ä»Šå›žç”¨ã„ãŸRAIDコントãƒãƒ¼ãƒ©ã¨ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ãŒä»¥ä¸‹ã®ã‚ˆã†ã«æŽ¥ç¶šã•ã‚Œã¦ã„ã‚‹ãŸã‚ã«ã€SCSIãƒã‚¹ã®å¸¯åŸŸ(ç†è«–値160MB/sec×2本)を使ã„切ã£ãŸãŸã‚ã¨è€ƒãˆã‚‰ã‚Œã‚‹ã€‚ 次ã«ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸å…¨ä½“ã®èªã¿æ›¸ã回数ã®ã‚°ãƒ©ãƒ•ã‚’見るã¨ã€ã‚·ãƒ¼ã‚±ãƒ³ã‚·ãƒ£ãƒ«èªã¿æ›¸ã(1024kb)ã®å ´åˆã¯SCSIãƒã‚¹ã®å¸¯åŸŸé£½å’Œã«ä¼´ã„IOPSãŒ220回å‰å¾Œæ¢ã¾ã‚Šã¨ãªã£ã¦ã„る一方ã€512kbãŠã‚ˆã³4kbã®æ›¸ãè¾¼ã¿ã®å ´åˆã¯ã»ã¼ãƒªãƒ‹ã‚¢ã«æ€§èƒ½å‘
Debunking the myths about redo, undo, commit & rollback
Performance tuning: Huge Pages in Linux By Riyaj Shamsudeen 3 Who am I? ï® 16 years using Oracle products ï® Over 15 years as Oracle DBA ï® Certified DBA versions 7.0,7.3,8,8i &9i ï® Specializes in performance tuning, Internals and E-business suite ï® Currently working for The Pythian Group www.pythian.com ï® OakTable member ï® Email: rshamsud at gmail.com ï® Blog : orainternals.wordpress.com 4 Disclaimer
Performance Tuning: HugePages in Linux
Recently we quickly and efficiently resolved a major performance issue with one of our New York clients. In this blog, I will discuss about this performance issue and its solution. Problem statement The client’s central database was intermittently freezing because of high CPU usage, and their business severely affected. They had already worked with vendor support and the problem was still unresolv
Speeding Up The Linux Kernel With Transparent Hugepage Support - Phoronix
Speeding Up The Linux Kernel With Transparent Hugepage Support Written by Michael Larabel in Software on 8 December 2010 at 02:51 PM EST. Page 1 of 2. 42 Comments. Last month we reported on the 200 line Linux kernel patch that does wonders for improving the desktop responsiveness of the system. There was certainly much interest (over 100,000 views to both of our YouTube videos demonstrating the ch
大容é‡ãƒ¡ãƒ¢ãƒªãƒ¼ã‚’最é©åŒ–ã™ã‚‹æ§‹æˆ
C 大容é‡ãƒ¡ãƒ¢ãƒªãƒ¼ã‚’最é©åŒ–ã™ã‚‹æ§‹æˆ ã“ã®ä»˜éŒ²ã§ã¯ã€HugePagesを使用ã—ã¦ã€Linuxオペレーティング・システムã®ãƒ©ãƒ¼ã‚¸ãƒ»ãƒšãƒ¼ã‚¸è¡¨ã«ã‚ˆã‚Šãƒ¡ãƒ¢ãƒªãƒ¼ã‚’最é©åŒ–ã™ã‚‹ãŸã‚ã®æ§‹æˆæƒ…å ±ã«ã¤ã„ã¦èª¬æ˜Žã—ã¾ã™ã€‚内容ã¯æ¬¡ã®ã¨ãŠã‚Šã§ã™ã€‚ HugePagesã®æ¦‚è¦ HugePages構æˆã«å¯¾ã™ã‚‹åˆ¶é™ é€éŽçš„ãªHugePagesã®ç„¡åŠ¹åŒ– C.1 HugePagesã®æ¦‚è¦ HugePagesを構æˆã™ã‚‹ã“ã¨ã‚’é¸æŠžã§ãã¾ã™ã€‚ã„ãã¤ã‹ã®ç”¨é€”ã§ã¯ã€HugePagesã«ã‚ˆã£ã¦é«˜åº¦ãªãƒ‘フォーマンスãŒå¾—られã¾ã™ã€‚ãŸã ã—ã€ã“ã®æ©Ÿèƒ½ã¯é«˜åº¦ãªæ§‹æˆã‚ªãƒ—ションã§ã™ã€‚Oracle RACã§ã¯å¿…é ˆã§ã¯ã‚ã‚Šã¾ã›ã‚“。 ã“ã®é …ã§ã¯ã€HugePagesã®æ¦‚è¦ã«ã¤ã„ã¦èª¬æ˜Žã—ã¾ã™ã€‚RPMや構æˆæƒ…å ±ã¯æ‰±ã„ã¾ã›ã‚“。構æˆã«å¿…è¦ãªä½œæ¥ã¯ã€ã‚·ã‚¹ãƒ†ãƒ ã®ã‚«ãƒ¼ãƒãƒ«ãƒ»ãƒ‡ã‚£ã‚¹ãƒˆãƒªãƒ“ューションã¨ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã«ã‚ˆã£ã¦ç•°ãªã‚Šã¾ã™ã€‚クラスタ・ノードã§HugePagesを使用ã™ã‚‹ã‚ˆã†
Enhanced Intel SpeedStep® Technology and Demand-Based Switching on Linux* - Intel® Software Network
Using Intel.com Search You can easily search the entire Intel.com site in several ways. Brand Name: Core i9 Document Number: 123456 Code Name: Emerald Rapids Special Operators: “Ice Lakeâ€, Ice AND Lake, Ice OR Lake, Ice* Quick Links You can also try the quick links below to see results for most popular searches. Product Information Support Drivers & Software
Why HTTP::Tiny?
I’ve recently been collaborating with Christian Hansen on HTTP::Tiny, a minimalist, HTTP/1.1 client library for Perl. For basic web client tasks like grabbing a single page or mirroring a file, it does the job in a fraction of the code that would be needed to install LWP::UserAgent. Because it has no non-core dependencies, it is ideal for what I need to get CPAN.pm to bootstrap itself with pure Pe
SystemTap - Wikinote
å‚考 URL SystemTap ã¨ã‚Šã‚ãˆãšå…¬å¼ãƒšãƒ¼ã‚¸ã® Documentation 㨠Wiki を見れã°äº‹è¶³ã‚Šã‚‹ã€‚ 覚ãˆæ›¸ã æ§‹é€ ä½“ã®ãƒ¡ãƒ³ãƒã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ã¯ã€ãƒã‚¤ãƒ³ã‚¿ã§ã‚れ実体ã§ã‚ã‚Œ -> を使ㆠatomic_t ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ã¯ã€->counter ã‚’è¿½åŠ ã™ã‚Œã°å¯èƒ½ 基本形 文法ã¯ã€awk ã«ä¼¼ã¦ã„る。begin/end ã¯ã‚ªãƒ—ション。 詳細㯠man stap ã‚’å‚ç…§ã®ã“ã¨ã€‚ #!/usr/bin/stap -v function my_function:string(arg1:long, arg2) { return value } probe begin { ... } probe kernel.function("sys_*") { printf("%s[%d] called %s()\n", execname(), pid(), probefunc()) } probe en
systemtapを使ã£ãŸå‹•çš„追跡 | Let's POSTGRES
NTT オープンソースソフトウェアセンタ ç¬ åŽŸ è¾°ä» ã¯ã˜ã‚ã« PostgreSQLã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³8.2ã‹ã‚‰ã€Soralis, FreeBSD, Mac OSXãªã©ã§ä½¿ç”¨å¯èƒ½ãªDtraceã¨ã„ã†æƒ…å ±å–得ツールã«å¯¾å¿œã—ã¾ã—ãŸã€‚Dtraceを使ã†ã¨ã€PostgreSQLã®ãƒˆãƒ¬ãƒ¼ã‚·ãƒ³ã‚° (ã‚る処ç†ãŒã©ã®ã‚ˆã†ãªé–¢æ•°ç‰ã‚’通éŽã—ã¦ããŸã‹ã®è§£æž) やプãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚° (ã‚る期間ã«ã©ã‚“ãªå‡¦ç†ãŒã©ã‚Œã ã‘実施ã•ã‚ŒãŸã‹ã®è§£æž) ãŒå¯èƒ½ã«ãªã‚Šã¾ã™ã€‚PostgreSQLã®ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«ã§ã‚‚動的追跡ã¨ã„ã†é …ã§ç´¹ä»‹ã•ã‚Œã¦ã„ã¾ã™ã€‚ã“れを利用ã™ã‚‹ã“ã¨ã§ã€ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã®ç™ºè¦‹ãªã©ãŒå¯èƒ½ã«ãªã‚Šã¾ã™ã€‚ Linuxã§ã¯ã€Dtraceã®é¡žä¼¼ã®æ©Ÿæ§‹ã¨ã—ã¦Systemtapã¨ã„ã†ãƒ„ールãŒå‚™ã‚ã£ã¦ã„ã¾ã™ã€‚本æ¥ã¯ã€ã‚«ãƒ¼ãƒãƒ«å†…部ã®ãƒˆãƒ¬ãƒ¼ã‚·ãƒ³ã‚°ã‚„プãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã‚’主ãªç›®çš„ã¨ã—ãŸãƒ„ールã§ã™ãŒã€ãƒ¦ãƒ¼ã‚¶ã‚¢ãƒ—リケーションã®æƒ…å ±å–å¾—ã‚‚å¯èƒ½ã§ã™ã€‚本記事ã§ã¯ã€Sys
SystemTapã§çœŸçŠ¯äººã‚’æ•ã¾ãˆã‚ï¼
図2ã¯ãƒªãƒ–ートã™ã‚‹å°‘ã—å‰ã®/proc/meminfoã«ã¤ã„ã¦ã€å‰é …ã®è¦³ç‚¹ã«åŸºã¥ã„ã¦ç©ã¿ä¸Šã’グラフを作ã£ãŸã‚‚ã®ã§ã™ã€‚ ã»ã¼ã™ã¹ã¦ã®ãƒ¡ãƒ¢ãƒªãŒActiveã¨ãªã£ã¦ãŠã‚Šã€MemFreeã‚„Inactiveã¯ã‚ãšã‹ã§ã™ã€‚ã“ã‚Œã¯ç¢ºã‹ã«ãƒ¡ãƒ¢ãƒªä¸è¶³ã¨ã„ãˆãã†ã§ã™ã€‚カーãƒãƒ«ã®ç‰©ç†ãƒ¡ãƒ¢ãƒªãŒæ€ªã—ã„ã¨è€ƒãˆã¦ã„ãŸã®ã§ã™ãŒã€è‚心ã®PageTablesã‚„Slabã€VmallocUsedãªã©ã¯ã‚ã¾ã‚Šå¢—ãˆã¦ã„ã¾ã›ã‚“。ã“ã‚Œã¯ä¸€ä½“ã©ã†ã„ã†ã“ã¨ã§ã—ょã†ã‹ï¼Ÿ ……ã¨ã€ã“ã“ã¾ã§ãã¦ã€1ã¤ä¸å¯©ãªç‚¹ã«æ°—ãŒä»˜ãã¾ã›ã‚“ã‹ï¼Ÿ ãã†ã€‚ã™ã¹ã¦ã‚’足ã—ãŸãƒ¡ãƒ¢ãƒªã®ç·é‡ãŒç´„12Gbytesã—ã‹ã‚ã‚Šã¾ã›ã‚“。確ã‹ã“ã®ã‚µãƒ¼ãƒã¯ãƒ¡ãƒ¢ãƒªã‚’50Gbytesæ載ã—ã¦ã„ã¾ã—ãŸã‚ˆã？ ãã‚ŒãŒã„ã¤ã®é–“ã«ã‹12Gbytesã«ãªã£ã¦ã„る……何やら大変ãªã“ã¨ãŒèµ·ãã¦ã„ãã†ã§ã™ã€‚ 確èªã®ãŸã‚ã«ã€ãƒªãƒ–ート時å‰å¾Œã®ãƒ¡ãƒ¢ãƒªä½¿ç”¨é‡ã®ã‚°ãƒ©ãƒ•ã‚’見ã¦ã¿ã¾ã—ょã†ï¼ˆå›³3）。リブートå‰ã¯10Gbytes
More mastering the art of indexing
This document discusses indexing strategies in MySQL to improve performance and concurrency. It covers how indexes can help avoid lock contention on tables by enabling concurrent queries to access and modify different rows. However, indexes can also cause deadlocks in some situations. The document outlines several cases exploring how indexes impact locking, covering indexes, sorting and query plan
Linux performance tuning & stabilization tips (mysqlconf2010)
Linux performance tuning & stabilization tips (mysqlconf2010) This document provides tips for optimizing Linux performance and stability when running MySQL. It discusses managing memory and swap space, including keeping hot application data cached in RAM. Direct I/O is recommended over buffered I/O to fully utilize memory. The document warns against allocating too much memory or disabling swap com
ソーシャルゲームã®ãŸã‚ã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹è¨è¨ˆ
・データベース的ãªè¦³ç‚¹ã§ã®ã‚½ãƒ¼ã‚·ãƒ£ãƒ«ã‚²ãƒ¼ãƒ ã®ç‰¹å¾´ ・データモデル ・ソーシャルゲームã«å¾“æ¥åž‹RDBMSを使ã†ã¹ãã‹ã€ï¿½æµè¡Œã‚Šã®NoSQLã§è¡Œãã¹ãã‹ ãƒ»è² è·å¯¾ç– (アーã‚テクãƒãƒ£é¢) ãƒ»è² è·å¯¾ç– (ツールé¢) ・インフラエンジニアã®ã‚ャリアã«ã¤ã„ã¦Read less
テã‚スト圧縮ã¯ã“れ一冊ã§OKï¼ï¼Ÿãªå„ªè‰¯æ›¸ç±ã€ŒThe Burrows-Wheeler Transformã€ã‚’èªã‚“ã - EchizenBlog-Zwei
以å‰ã‚ˆã‚Šæ°—ã«ãªã£ã¦ã„ãŸæ›¸ç±ã€ŒThe Burrows-Wheeler Transform Data Compression, Suffix Arrays, and Pattern matchingã€ã‚’èªã‚€æ©Ÿä¼šã‚’å¾—ã‚‹ã“ã¨ãŒã§ããŸã€‚ãã‚Œãªã‚Šã«é«˜é¡ãªæœ¬ã ã£ãŸã®ã§è³¼å…¥ãŒèºŠèº‡ã£ã¦ã„ãŸã®ã ã‘ã©ã€ã“ã‚Œã¯è‡ªåˆ†ç”¨ã«è³¼å…¥ã—ã¦ã‚‚ã„ã„ã‹ã‚‚。ã¨ã„ã†ãらã„ã®è‰¯æ›¸ã ã£ãŸã®ã§ç´¹ä»‹ã—ã¦ãŠã。 本書ã¯ã‚¿ã‚¤ãƒˆãƒ«ã®ã¨ãŠã‚ŠBWT(Burrows-Wheeler変æ›)ã«é–¢ã™ã‚‹æ›¸ç±ã€‚サブタイトルã«ã‚るよã†ã«ãƒ‡ãƒ¼ã‚¿åœ§ç¸®ã‚„SuffixArrayã«ã‚ˆã‚‹å…¨æ–‡æ¤œç´¢ã«ã¤ã„ã¦ã‚‚充実ã—ãŸå†…容ã«ãªã£ã¦ã„る。最後ã®Pattern matchingã¯ãƒ†ã‚ストã‹ã‚‰æ¤œç´¢ã‚ーã¨exactã«ãƒžãƒƒãƒã—ãŸã€ã‚‚ã—ãã¯é¡žä¼¼ã—ãŸç®‡æ‰€ã‚’å–り出ã™ã‚ˆã€ã¨ã„ã†è©±ã€‚2008å¹´ã®æœ¬ãªã®ã§æ¯”較的新ã—ã„話題も扱ã£ã¦ã„ã¦æº€è¶³åº¦ãŒé«˜ã„。 ã¾ãŸæœ¬æ›¸ã®ç‰¹è‰²ã¯åœ§ç¸®ã‚ã‚Šãã§å§‹ã¾ã‚Šã€ãã“ã‹ã‚‰å…¨æ–‡æ¤œç´¢å¯èƒ½ãª
libvirtã®Perlãƒã‚¤ãƒ³ãƒ‡ã‚£ãƒ³ã‚° "Sys::Virt" - jitsu102's blog
libvirtã‚’Perlã‹ã‚‰ä½¿ç”¨ã™ã‚‹ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ« Sys::Virtを使ã£ã¦ã¿ã¾ã—ãŸã€‚ Sys::Virtã®ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ« ãƒãƒ¼ã‚¸ãƒ§ãƒ³ãŒå¤ã„ã§ã™ãŒã€CentOS 5.5ã«åŽéŒ²ã•ã‚Œã¦ã„るパッケージを使用ã—ã¾ã—ãŸã€‚*1 $ sudo yum install perl-Sys-Virt èµ·å‹•ä¸ã®ä»®æƒ³ãƒ‰ãƒ¡ã‚¤ãƒ³æƒ…å ±ã®å–å¾— 以下ã®ã‚ˆã†ãªã‚¹ã‚¯ãƒªãƒ—トã§ã€ä»®æƒ³ãƒ‰ãƒ¡ã‚¤ãƒ³ã®æƒ…å ±ãŒå–å¾—ã§ãã¾ã™ã€‚ #!/usr/bin/perl use warnings; use strict; use Sys::Virt; my $addr = 'qemu:///system'; my $vmm = Sys::Virt->new(address => $addr); my @domains = $vmm->list_domains(); foreach my $dom (@domains) { print "----- ", $do
NEC Express5800 Lab. ゴッパãƒãƒ»ãƒ©ãƒœ - ゴッパãƒãƒ»ãƒ©ãƒœ - OSDN
注目トピック高ã„é™éŸ³æ€§ã¨è¨ç½®æ€§ã‚’両立ã•ã›ãŸã‚ªãƒ•ã‚£ã‚¹å‘ã‘水冷スリムサーãƒã€ŒExpress5800/110Ge-Sã€ã®ãƒ¬ãƒ“ュー記事を掲載ã—ã¾ã—ãŸã€‚ ユーザーã®ã‚»ãƒ«ãƒ•ã‚«ã‚¹ã‚¿ãƒžã‚¤ã‚ºã‚’å‰æã¨ã—ãŸä½Žä¾¡æ ¼â€œãƒ•ãƒ¬ãƒ¼ãƒ サーãƒâ€ã€ŒExpress5800/S70ã€ã®ãƒ¬ãƒ“ュー記事“フレームサーãƒâ€ Express5800/S70 分解レビューを掲載ã—ã¾ã—ãŸã€‚ SIGMABLADEクイックスタートガイドã®ã‚³ãƒ¼ãƒŠãƒ¼ã«ã¦ã€ŒSIGMABLADE＋SigmaSystemCenterã«ã‚ˆã‚‹ä»®æƒ³ãƒžã‚·ãƒ³ã®è‡ªå¾‹é‹ç”¨ã‚·ã‚¹ãƒ†ãƒ ã€ã‚’公開ã—ã¾ã—ãŸã€‚ i120Ra-e1ã®æ¶ˆè²»é›»åŠ›ã®æ¸¬å®šçµæžœã‚’掲載ã—ã¾ã—ãŸã€‚ ⇒i120Ra-e1（Quad Core Xeon ×2, SATA HDD ×3, Hardware RAID-5） SIGMABLADEクイックスタートガイドã®ã‚³ãƒ¼ãƒŠãƒ¼ã«ã¦ã€ŒSIGMABLADE＋SigmaSystemCenterã«ã‚ˆ
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Monitoring Oracle on SMP with Hyper-Threading : Ardent Performance Computing
Hyper Threading Performance - Venu Anuganti
https://docs.google.com/viewer?a=v&q=cache:FNhH4bnnHZQJ:ftp://download.intel.com/support/motherboards/server/sb/configuring_raid_for_optimal_perfromance_11.pdf+RAID+adaptive+read+ahead+performance&hl=ja&gl=jp&pid=bl&srcid=ADGEESi1-VnUsTMjhTgtUAvkjVhemm1pdW
http://www.putise.co.cc/storage-disk-iroha/disk-array-raid-level
Intel Hyperthreading Does Little for Oracle Workloads. Who Cares? I Want My Xeon 5500 CPU with Simultaneous Multi-Threading (SMT)!
LW2008SystemTapTutorial - Systemtap Wiki
VIMSyntaxHighlightingForSystemtap - Systemtap Wiki
レッドãƒãƒƒãƒˆ マガジン 64ビットコンピューティング: 32ビット環境ã§ã®å…±å˜
IBM Developer
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