how to lower latency wow

How to reduce the latency of mysql master/slave data synchronization: bitsCN.com Generally, the master/slave mechanism based on LAN can meet the requirements of 'realtime' backup. If the latency is high, first confirm the following factors:1. network latency2. master load3. slave loadThe general practice is to use multiple slave instances to allocate read requests, and then retrieve a dedicated server from

The difference between an embos interrupt and a zero latency interrupt are the interrupt priority level and the usage of OS _enterinterrupt ()/os_leaveinterrupt () or Os_enternestableinterrupt ()/os_leavenestableinterrupt ().Example of an embos interrupt function: void Os_com_isrhandler (void int Dummy; Os_enternestableinterrupt (); Dummy = Us_rhr; // call Embos API functions here Span style= "color: #000000;" > Os_leavenestableinterru

ORACLEMySQL5.6 supports multi-thread replication. you can configure the slave_parallel_workers option to achieve multi-thread concurrent replication on the slave. However, it can only support concurrent replication between multiple databases under an instance, and cannot truly achieve multi-table concurrent replication. Therefore, when there is a large concurrent load, slave still cannot catch up with the master in time, and it is necessary to find a way to optimize it. Generally, slave has a l

/Num_of_reads)END, Writelatency= Case whenNum_of_writes= 0 Then 0 ELSE(Io_stall_write_ms/Num_of_writes)END, Latency= Case when(num_of_reads= 0 andNum_of_writes= 0) Then 0 ELSE(Io_stall/(num_of_reads+Num_of_writes))END, --avg bytes per IOPAvgbperread= Case whenNum_of_reads= 0 Then 0 ELSE(Num_of_bytes_read/Num_of_reads)END, Avgbperwrite= Case whenIo_stall_write_ms= 0

Latency functions in Linux Shell Latency processing is often required in Linux shell scripts. Therefore, sleep or usleep functions are often used. The difference between sleep and usleep is as follows: Sleep: the default unit is seconds. Usleep: measured in microseconds by default. 1 S = 1000 ms = 000000us Sleep not only uses seconds, but also specifies the unit of

Java latency instance analysis: Lock vs Synchronized This article discusses through examples: -Java. concurrent. Lock: Garbage created-Compare Lock and synchronized-How to calculate latency through programming-Impact of Lock and synchronized Competition-The possible impact of co-ordinated omission missing in the latency test on the result Go back to one of m

the library or the Binlog part, the Binlog can directly directly on the library directly from the execution, you can also parse a row of data DML operations, the Binlog part is as follows:==========================================================================================================Another interesting question is that if you are running mysqldump from the library and you are using parallel replication from the library, backup and replication will be blocked from each other:In the abo

Causes of master-slave replication delays:(1) The main library is too many from the library, causing replication delays(2) The difference from the library hardware compared to the main library, resulting in replication delay(3) too many slow SQL statements, resulting in replication latency(4) Master-slave replication design problem, resulting in replication delay(5) Network latency between master and slave

Solution to ssh connection latency-Linux Enterprise Application-Linux server application information. The following is a detailed description. 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 and change UseDNS yes to UseDNS no. However, we have encountered Anonomous Ubuntu, and there is still a

Latency function error: volatile and volatile An inexplicable error. Latency caused by the use of javasick. The initialization is like this: // SysTick Configuration SysTick_CLKSourceConfig (SysTick_CLKSource_HCLK_Div8 ); If (SysTick_Config (SystemCoreClock/1000) // enable clock interruption and configure Clock. { While (1 ); } Then: // Latency function. 1 nTime

Android Activity latency jump, androidactivity Sometimes we find that some APP boot pages are waiting for a while to be transferred to the Home Page. In fact, they are processing data operations at this time. Today we will simulate the Android Activity delay jump function! In fact, it is very simple to add a piece of code: New Handler (). postDelayed (new Runnable () {public void run () {// code of the place you want to jump to finish () ;}, 2000)

synchronization mechanism relies on Slave to actively send requests to the Master to obtain data. In addition, due to server load loss and network congestion, the data synchronization latency between the Master and Slave is completely unguaranteed. Within 1 second, it may take several seconds, dozens of seconds, or even longer. Due to data delay, when the application updates data on the Master and needs to read data from the database immediately, at

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