wow latency

1. Now, the business logic is to update a piece of data to 2, and then count the data with the status of 2. Due to the master-slave latency of MySQL, data is sometimes accurate and sometimes inaccurate. 2. Data Update and statistical data are logically the same and cannot be separated. For example, if I just saved the money and changed the status of the data table field to 2... 1. Now the business logic is to update a piece of data to 2 and then count

Application of C + + in low-latency trading systemIn the financial derivatives markets, market makers shoulder the obligation to quote for options Futures products (quoting)."Low latency" is crucial for such companies, and if you are faster than others, the same offer can be prioritized, the wrong offer can be withdrawn quickly, and the wrong pricing on the market can be arbitrage. Obviously, manual order i

The reliability, delay and consistency of the distributed system are general problems, not limited to the database, and Cassandra provides a good solution to the problem.Cassandra claims to be able to achieve the efficient access to database access across data centers, and it is implemented in a way that gives users the tradeoff between latency, throughput, and consistency. Cassandra provides two levels of access: Local_quorum and Each_quorum, where

for FPS games. Generally 20-40Hz. 2. Message Type Sampling: Send changed data only when the input status changes. (Like keydown and keyup) Act games are suitable for this type. FPS games only support fixed sampling because mouse input is continuous data. If a message is used, moving the mouse once may produce many sampling requests. In addition, hybrid sampling can be combined for 1, 2, and fixed sampling for the mouse, while message sampling can be used for other keys. To reduce

technicians> 1. Principle of master-slave synchronization latency in MySQL databases. To talk about the delay principle, we must start with the mysql database master-slave replication principle. mysql master-slave replication is a single-thread operation, The main database generates binlogs for all DDL and DML data. The binlog is sequential write, so the efficiency is very high. The Slave_IO_Running thread of slave takes logs from the main database,

of various rates, because the transmission time has nothing to do with the link encoding rate (bandwidth, after being transmitted to the other party, the other party also needs to decode (so the time required for encoding is multiplied by 2), which also depends on the link bandwidth. Therefore, when the transmission distance between two points is very close, for example, 1 km, the transmission latency is ≈ 0.0066 MS, which can basically be ignored. S

MySQL Master/Slave latency monitoring script (pt-heartbeat), mysqlpt-heartbeat We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table in the master database by using a timestamp. Then, it reads the updated timestamp from the slave database and compares it with the local system time to get its

Monitor MySQL Master/Slave synchronization latency There are usually two ways to monitor the latency between MySQL master and slave: Seconds_Behind_Master and mk-heartbeat. Method 1: monitor the value of the Seconds_Behind_Master parameter output by the show slave status \ G command to determine whether there is a master-slave latency. Show slave status; # The re

network wait icon during GC and blame the pause on network latency or something else But Russ Cox shot these ideas down for some reason, so they decided to roll up their sleeves and actually try to improve t He Go GC. The algorithm they developed trades program execution throughput for reduced GC latency. Go programs'll get a little bit slower in exchange for ensuring lower GC latencies. No

We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table on the master database using timestamps, then, read the updated timestamp from the database and compare it with the local system time to monitor the # code/5799.html "target =" _ blank "> master/slave replication latency of the MySQL database, we can use

We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table on the master database using timestamps, then read the updated timestamp from the database and compare it with the local system time to monitor the https://www.php1.cn/code/5799.html "target =" _ blank "> MySQL database master/slave replication latency,

PHPStatic latency static binding usage analysis, static. PHPStatic latency static binding usage analysis. static this article describes PHPStatic latency static binding usage. For your reference, see PHP5.3 and later introduction of PHP Static latency static binding usage analysis. This article describes the usage of

Original: http://www.javaranger.com/archives/1264With respect to throughput (throughput) and latency (latency), if you want to perform performance optimizations, these two concepts must be known, and they seem simple but not. Many people have thought that high throughput means low latency, and high latency means less t

Tags: blog HTTP ar SP Div on 2014 art log Taking the official Third Person template as an example, the uspringarmcomponent in the character blueprint implements most of the camera and scene collision and interaction functions. To implement camera latency, you only need to modify the attributes in the lag column. The first one controls the latency when the camera moves, the second is the

This article mainly introduces the latency analysis of slave monitoring in MySQL, which is mainly used in the MySQL replication environment. If you need it, you can refer to the MySQL replication environment, we usually only judge the SLAVE latency based on the value of Seconds_Behind_Master. This is acceptable in most cases, but not accurate enough. More factors should be considered. First, let's take a l

Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the implementation process is recorded here. Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the implementation process is recorded here. Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the

When it comes to latency in the program, how do you think about it and start a new thread? If my program only uses a single thread, but wants the function to wait for 10 seconds to return the value, and cannot process other messages as if I used the sleep function? Here I will summarize several latency methods that can be seen in the Forum. In addition, I am not responsible for studying other people's sourc

Subtotal on MySQL Master/Slave latency I have encountered several MySQL master-slave latency issues recently, and some of my colleagues complained about this. Sort it out a little bit. ------------------------------------ Body ------------------------------------ Two scenarios with problems: Scenario 1: it takes about 10 minutes for the master database to perform the alter operation. It also takes about

Just this morning, my system's network request latency was up to 544 milliseconds to 6937 milliseconds. And this is on an activated network interface. This can take an additional 10 seconds if the interface is activated from power-saving mode. So in order to provide a good user experience, the app needs to consider at least more than 10 seconds of network latency.If the app initiates a user authentication request, only the successful user can enter th

Using pt-heartbeat to monitor the replication latency of MySQL, pt-heartbeatmysql Pt-heartbeat During database master-slave replication, whether the replication status and data delay are normal is a critical indicator. How can we monitor it? Pt-heartbeat is a centralized tool developed by PERCONA to monitor replication latency of MySQL and PostgreSQL. Mature, such as Uber and other large companies. I will n