latency optimizer

Original address: http://www.symphonious.net/2011/07/11/lmax-disruptor-high-performance-low-latency-and-simple-too/The LMAX disruptor is an ultra-high performance, low-latency message exchange between threads. It's a bit like a queue on steroids (but quite a lot of steroids) and are one of the key innovations used to make the LMAX Exchange run so fast. There is a rapidly growing set of information on what t

1. Select the correct languageScripting languages can't be used, although they can run faster and faster, and when you're looking for a few milliseconds of delay you can't afford to explain the language, you want to have a powerful memory model that can be programmed without lock, with Java Scala and C 11 or go in the language of choice.2. Put everything in memoryI/O kills your latency and ensures that all your data is in memory, which means you manag

Article Title: how to solve the login latency of SSH connections in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Generally, the SSH connection latency is caused by reverse DNS resolution enabled by sshd by default. Modify/etc/ssh/sshd_config of the ssh server

There is a good Test on the Performance of WCF in CodePlex, WCF Latency Test Harness, different binding (netNamedPipe, netTcp, netMsmq, basicHttp, wsHttp, Remoting), different serialization methods, different request data volumes, different request methods for testing, the test content can be set through the configuration file. The test metric is latency. There is A throughput test on MSDN: A Performance Co

In the morning, there was a piece of translated news in the news of major open-source websites-"Sun engineers were surprised to find that roar could increase the hard disk latency." Another YouTube video, Brendan Gregg, an engineer at the fishworks lab, yelled at the array and observed significant latency on a computer's monitoring software. There are a lot of comments about this news, and many people thi

JQuery latency plug-in doTimeout, jquerydotimeoutIn many specific applications, the event delay trigger is required. The setTimeout function is used in specific implementation, but it is still inconvenient to use. So here we introduce a jQuery plug-in doTimeout, this plug-in can achieve the same effect as setTimeout, and is easy to use. At the same time, you can forcibly execute the callback function before running timeout. Supports jQuery chained cal

Use zabbix to monitor latency of international linesIn many cases, the lines of various manufacturers in China are unstable, but they can only be tested temporarily. No detailed statistics are provided. Here, zabbix is used to collect statistics under this record.Trigger can be used for alarm when you are concerned about latency1. Compile the zabbix monitoring script. The following uses monitoring the Hong Kong server as an example: #! /Bin/bash

In-depth analysis of network latency during Android boot In general, the property of phone is persistent to true, and the phone process is called up earlier. Applications modified by android: presistent will be started by AM after the system is started, even if they are not running, AM also calls startProcessLocked to start the process. Start package com. android. phone, that is, phone application. This will directly call onCreate () of PhoneApp and e

reuse of data. Reusing data while it is still in the cache avoids sustaining memory fetch stils and generally CES the memory bus load. Memory latency The times it takes to initiate a memory fetch is referred to as memory latency. During this time, the CPU is stalled. The latency penalty is on the order of 100 clock cycles. Caches were authorized Ted to hide suc

When FFMPEG was recently used for h264 encoding, it was found that the video encoding was delayed, rather than real-time Encoding. After some research, we found thatAvcodec_open2Function When encoder is enabled, SetAvdictionaryThe key code is as follows: Avcodec_open2 function: int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); Solution: Avdictionary * Param = NULL; // h264, set to encode latency to encode imm

First,description of problem phenomenaAfter successful installation of a Dell Server Rhel 6.8 System, the user reflects a high latency when logging in to the server via SSH, and can delay up to 6-7s or even direct error.Connecting to 10.0.0.10:22 ...Connection established.To escape to local shell, press ' ctrl+alt+] '.Information to display when connectingLast Login:thu Jul 7 16:24:56 from 10.0.0.10Wait a long time before showing successful connection

Pt-heartbeat Database master from replication, replication status, data latency is a very important indicator of the normal, then how to monitor it? Pt-heartbeat is a tool set developed by Percona to monitor the replication latency of MySQL and PostgreSQL. More mature, such as Uber and other large companies are in use. Monitoring principle Build a heartbeat table in master, which has a timestamp field

Tags: style http color os IO strong AR for 2014Slave latency monitoring in MySQL replicationHttp://imysql.com/2014/08/30/mysql-faq-howto-monitor-slave-lag.shtmlIn a MySQL replication environment, we usually only judge the latency of the slave based on the value of the seconds_behind_master . This is acceptable in most cases, but is not accurate enough and should be considered for more factors.First, let's l

When a WHERE clause uses a function for a column, the Oracle optimizer cannot use the index in the query unless this simple technology is used to force the index. Generally, if you do not use functions such as UPPER, REPLACE, or substrd in the where clause, you cannot create specific conditions for the specified column. However, if these functions are used, there will be a problem: these functions will prevent the Oracle

Today, I found a garbled php file with a password on a friend's website. Later I found that php uses zend optimizer encryption. We only need to install Zend Optimizer on the machine, I am using Directadmin. The following describes the installation steps. A customer responded to the website garbled and used zend optimizer encryption. After checking the vps, they f

New Visual C ++ code optimizer and visual Optimization Microsoft released a new advanced code optimizer in May 4 to serve the Visual C ++ back-end compiler. It improves code performance, compresses code size, and brings the compiler into a new realm. The Visual C ++ team said on the blog that this will be the first version released. We encourage everyone to try and give suggestions and feedback. The new

ZendExtensionManager. dll -- Zend extension plug-in ManagerZend extension plug-in Manager installation Tutorial:1. Install Zend Optimizer 3.3.0a: http://www.jb51.net/softs/9305.htmlIn this way, Zend Extension Manager v1.2.0 is installed and Zend Optimizer 3.3.0a is inserted.Zend Extension Manager principle:1. Open php. ini and find[Zend]Zend_extension_ts = "e: \ Zend \ ZendOptimizer-3.3.0 \ lib \ ZendExtens

Oracle RBO/CBO Optimizer Oracle optimizer has two optimization methods: Rule-Based Optimization (RBO) and cost-based optimization (cost-based optimization, (for short, CBO). In oracle8 and later versions, the CBO method is recommended for Oracle strong columns. RBO mode: when analyzing SQL statements, the optimizer follows some predefined rules in Oracle. For

PHP Environment build dedeampz+zend Studio 9.0.4+firefox+zend Studio Toolbar 2.6 +zenddebugger+optimizer-3.3.0 PHP Environment build dedeampz+zend Studio 9.0.4+firefox+zend Studio Toolbar 2.6 +zenddebugger+optimizer-3.3.0 1. Download Dedeampz Http://www.dedecms.com/html/chanpinxiazai/20080905/39481.html Download completes the direct installation. Note that the installation completed here PHP.ini species a

Test the SHOPEX program installation on Windows Server 2008 R2, which was found to be garbled (the server has been configured with PHP) as follows:This is because the SHOPEX program uses Zend encryption, so the server needs to install Zend Optimizer to be displayed properly. Next, how to install Zend Optimizer on the server. I. Download the Windows version of Zend Opti