how to lower latency wow

Latency index and paging Optimization for Mysql optimization; latency index Paging for mysql What is delayed indexing? Use the index to query the data, and then connect the query results to the data in the same table to improve the query speed! Paging is a common feature. select ** from tableName limit ($ page-1) * $ n, $ n Insert 10000 data entries in a stored procedure for testing: create table smth1 (id

/*************************************** * String consisting of uppercase and lowercase letters, now, you need to modify the name and place all the lower-case letters in front of the acknowledgment letter (the original order is not required between the upper and lower-case letters ), if possible, the time and space efficiency should be selected as much as possible. Algorithm C Language Function prototype

the video cache detector VBV. It is used as the cache between the encoder and the decoder bit stream, you can set it as small as possible or reduce latency without affecting the video quality. 3. If the latency is optimized only, a large number of key frames can be inserted between video frames so that the client can decode the video stream as soon as it receives it. However, if you need to optimize the cu

and memory overhead of GCConcurrency GC usually increases CPU usage. We observed a well-run CMS default setting, and the increased CPU usage caused by concurrent GC and G1 garbage collector work significantly reduced the throughput and latency of the application. Compared to CMS, G1 may occupy more memory overhead than the application. For low-throughput, non-compute-intensive applications, the GC's high CPU usage may not need to be feared.Figure 2 p

Background Introduction Sparrow's paper is included in Sosp 2013, on the Internet can also find a writer's talk ppt, it is worth mentioning that the author is a bit ppmm. She has previously published a case for Tiny Tasks in Compute Clusters, this article I did not read carefully, but at that time when looking at the mesos thickness and granularity pattern, the group has discussed this paper. Combined with her GitHub project, she found that she and Mesos,spark in the amp lab had a lot of roots i

. Understanding the CPU and memory overhead of GCConcurrent GC typically increases CPU usage. We observed a well-run CMS default setting, and the increased CPU usage caused by concurrent GC and G1 garbage collector work significantly reduced the throughput and latency of the application. Compared to CMS, G1 may occupy more memory overhead than the application. For low-throughput, non-compute-intensive applications, the GC's high CPU usage may not need

. Understanding the CPU and memory overhead of GCConcurrent GC typically increases CPU usage. We observed a well-run CMS default setting, and the increased CPU usage caused by concurrent GC and G1 garbage collector work significantly reduced the throughput and latency of the application. Compared to CMS, G1 may occupy more memory overhead than the application. For low-throughput, non-compute-intensive applications, the GC's high CPU usage may not need

(Original file name: 20101107100.jpg) Reference Image Set alarm: (cursor flashing) (Original file name: 20101107105.jpg) Reference Image Set Time: (cursor flashing) (Original file name: 20101107106.jpg) Reference Image PC command to modify the lower computer subroutine design: (Original file name: 20101107107.jpg) Reference Image ========================================================== -5-program description = =

Interrupt latency or interruption DelayThis refers to the time period from the interruption generation to the CPU response interruption, that is, the time period from T2 to T3 in the figure. The interrupt latency is caused by the kernel disabling the interrupt response of the CPU before entering the critical section. During this period, although the external device makes the interrupt request line of the CP

timing precision requirements, such as dynamic display of Bitmap. Method 2: Use the sleep () function in VC to implement latency. Its unit is ms. For example, if the latency is 2 seconds, use sleep (2000 ). The accuracy is very low, and the minimum timing accuracy is only 30 ms. The disadvantage of using the sleep function is that other messages cannot be processed during the delay period. If the time is t

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 latency. 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

. The process logic of the control part is complex, while python is good at describing the logic. I was a little worried about Python's running efficiency, but it was not necessary: the whole system is under load, not the control part, and the control part won't put too much pressure. In addition, the CPU is powerful enough, the latency bottleneck lies in I/O. Moreover, Python also reused the Protocol codec library we previously implemented using C. T

delay caused by various relay, forwarding, or protocol conversion devices on the entire Link, the throughput is lower. The more accurate formula for calculating the actual data transmission throughput is V = TCP window size limit 2 (TCP window size limit link bandwidth + distance between half light speed + link device processing latency ). In short, the farther the distance is, the

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

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

datacenter, the consistency problem is resolved. This method is to sacrifice the "small" user performance, so as to achieve the overall performance maximization; As an example of DataStax enterprise:The required end result is for users in the US to contact one datacenter while UK users contact another to lower end-user Latency. An additional requirement are for both of these datacenters to being a par

of 1 to, therefore, when B receives the data for the second time, it will inexplicably produce a latency of about MS-This latency is not anything else, it is the default sending latency of the ACK Validation Package. When we test our self-developed server-side communication framework, once it is broadcast, at this time, the client in the receiver is likely to ca

When we mention latency statistics, we must come up with the term "Performance Testing". That's right. In redis's redis_benchmark file, we did use the relevant information in the latency file. The official explanation of this file in redis is as follows: /* The latency monitor allows to easily observe the sources of latency