dynamodb latency

Latency of next-generation SSD controller based on low-density Inspection Author: Stephen BatesLatency Variability In the previous blog, I talked about how the Error Correction Code (ECCS) in the enterprise-level SSD controller is being converted to Low-Density Parity Check (Low-Density Parity Check. This article also implies that this conversion will have a profound impact on the latency in the next-genera

MySQLDatabaseMaster/Slave latencyHow to judge? This article introduces two methods for judging: 1. Seconds_Behind_Master vs 2. mk-heartbeat. Next we will introduce these methods separately. In daily work, for MySQL master-slave replication check, on the one hand, we need to ensure that the overall structure of the replication is normal, on the other hand, we need to check whether the master-slave data is consistent. For the former, we can monitor whether the replication thread is working normall

First, declare that the "high concurrency" here is relative, relative to the hardware, rather than absolute high concurrency. The latter must be implemented in a distributed manner. We will not discuss it here. This article focuses on the high concurrency of a single machine. Recently, a voice communication system was developed, requiring online users and 1 K concurrent calls. The hardware is two servers, core and multi-core, 4G memory, and 1g NIC (the best hardware I have ever used, so it shoul

Reprinted from: Http://www.jianshu.com/p/6e2b68a93c88 One, mobile 300ms click DelayIn general, if the mobile browser is distributing the Click event without special processing, there will usually be a delay of around 300ms. That is, when we click on the page, the mobile browser does not respond immediately, but will wait for a few moments before the effect of clicking. In the early days of the mobile web, users ' sense of 300ms latency was not obvious

Modifying the Registry improves the slow network speed caused by Tcp latency in Windows. TCP is a link-oriented communication protocol. Each sending and receiving action of both parties must be based on the normal communication link. Therefore, TCP provides the default ACK authentication mechanism. The ACK authentication method is related to the operating system. In TCP, data validation is often delayed. When the delay timer does not overflow, general

Processing of network latency in online shooting games (Jinqing's column) Network latency in online games is unavoidable.For example, if a mobile client sends a command to receive confirmation from the server, there will be a latency of Ms,If the client is moved after ms, the operability will be very poor.Generally, it does not wait for the server to confirm. M

Tags: H.264 thread buffer parallel The latency of x264 encoding is studied. The method is to add log in x264.c Static int encode (x264_param_t * Param, cli_opt_t * OPT) { ... I _frame_size = encode_frame (H, opt-> Hout, pic, last_dts ); If (I _frame_size = 0) // delay Frames Fprintf (stderr, "output zero % d \ n", I _frame ); ... } After statistics, we found that the number of x264 encoded delayed frames conforms to the following formula. H-> frame

This is a BDP test in rhca, which is also a very common simulation of latency and packet loss. I will share it with you now. We also use the application software to test TCP/UDP comparison. When we test the impact of BDP on TCP/IP, we all need some network latency and packet loss simulation, many commercial software can do this. In fact, the perfect Linux itself can use TC to implement this function. the ne

Ask for help! About network latency! -- Linux Enterprise Application-Linux server application information. For details, refer to the following section. I recently studied network latency. I have learned from some papers that network latency depends on four parts: the processing latency of the sending end, the transmiss

HTTP transaction latency-TCP impact Recently, I have read the HTTP authoritative guide, a big part of which often reminds us of boring usage and technical indicator explanations ...... make people big. However, this book makes me feel "fresh". On the one hand, the author uses easy-to-understand languages and a large number of icons, which makes us easy to understand, on the other hand, I have always been interested in network programming and have a g

We know that there are many concepts in computers that are not easy to understand. sometimes, a good analogy can beat many explanations. The following are two wonderful metaphors I have seen. let's share them with you. We know that there are many concepts in computers that are not easy to understand. sometimes, a good analogy can beat many explanations. The following are two wonderful metaphors I have seen. let's share them with you. The first analogy is about throughput and

user requests to participate in the interaction, the moderator agreed to a user's request;3 The user participates in the live broadcast, the user and the host's interactive process live to all other fans;So how do you achieve a function like this? Today we will introduce several methods of implementation;The first way is through two RTMP streams to achieveThe current live protocol is commonly used by the RTMP protocol, which is an adobe implementation of a proprietary protocol for audio and vid

"I chose to use animations instead of transitions when doing some of the effects on the mobile side today, and this 300ms click Delay is one of the main reasons why I use animations instead of using transitions"Animations and TransitionsCommon denominator: All CSS controls dom motion,Different points:1, Transition: Only two keyframes, start and end;2. Animation can set multiple keyframes3. Transitions must be triggered by events4, the animation does not need to open can move"CSS execution faster

Basic tutorial on solving the Slave latency problem in MySQL, mysqlslave I. Cause AnalysisGenerally, slave has a large latency compared to the master. The root cause is that the replication thread on the slave cannot truly achieve concurrency. Simply put, on the master node, the transaction is committed in the concurrency mode (mainly based on the InnoDB engine), while on the slave, the replication thread

Tags: Unreal Engine character Taking the official Third Person template as an example, the uspringarmcomponent in the character blueprint implements most of the functions such as camera and scene collision and interaction. 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

CPU speed (MHz) and high precision latency (microsecond) (Browsing 20979 times) Victor Chen, (C ++ fans) I. High-Precision latency is the basis of CPU speed measurementWindows has a very high-precision timer in microseconds, but different systems have different timer frequencies, which may be related to hardware and operating systems. You can use the API function queryperformancefrequency to obtain the ti

Resisting network interference is a major problem that needs to be solved in our network. Here we will explain how to solve the latency problem in detail. The latency of all 802.11 Wireless Networks in the city is complex. The city's security department plans to convert thousands of repeated passwords into more powerful, two-factor authentication methods. Why? The city's security architects said they had cr

When I entered Pinterest, my first three weeks were spent in this part, where the latest projects applied the results of production problems to the entire software stack. In this part, we learn how Pinterest is built by building Pinterest, and it's not uncommon to submit code and make meaningful contributions in just a few days. In Pinterest, new engineers have the flexibility to choose which group to join, and as part of their work experience in this part, writing different parts of the code ca

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