process performance counter

Analysis of the relationship between the I/O process and storage performancehttps://community.emc.com/docs/DOC-28653Performance "The term can be said to accompany the development of the entire IT industry, every time new technologies emerge, from hardware to software in most cases are around performance improvement. The Moore theorem points out that the CPU's processing speed doubles every 18 months, but it

performance evaluation process after the completion of the monthly performance plan of all employees, the system automatically according to the assessment of the relationship table (tree structure, parent node is the sub-node of the assessment, the director of the Department for the lowest level of assessment) to launch a task, the lowest level of the assessment

handling asynchronous events with the Greenlet process Since Pycon 2011 has become a hot topic, I have been interested in it. In order to be asynchronous, we used multithreaded programming. However, the thread's performance bottleneck in the GIL Python and the high error risk of multithreaded programming, the combination of "coprocessor + multi-process" is gradua

, such as business logic, SQL optimization, algorithms and so onIn this example, the Linux kernel parameter adjustment, the network has more detailed parameters, please refer to:11 1In this test, the adjustment of the relevant one-piece is as follows:1, Resin to handle the adjustment of the service:Conf\resin.xml file parameter adjustment under Resin directoryfree-min>10m free -min>Specific adjustment methods, you can refer to the JVM performance tuni

1. Features of the node. JS Single Threadnode. JS is an asynchronous, non-blocking single thread that guarantees its execution speed. What is a non-blocking single thread? To give a real-life example, I went to the nest big canteen to play rice, I chose a package, and then the staff area for my meal, I was waiting for the next until the aunt called and then I took the meal. This process is synchronous . If the staff are caterin

shown, when storage faces multiple I/O processing at the same time, there is always an I/O that will come out at the end of the entire stream and increase I/O time. So, at each node of the I/O stream, there is a bottleneck, or a short board. I/O time-consuming will increase.In summary, the relationship between I/O flow and storage performance can be summed up in the following points: Complete an I/O stream the main experienced node has HBA,F

11: The process of Web page generation and its impact on performance the process of page generation The Web page generation process can be roughly divided into five steps 1. HTML代码转化为DOM2. CSS代码转化成CSSOM（CSS Object Model）3. 结合DOM和CSSOM，生成一棵渲染树（包含每个节点的视觉信息）4. 生成布局（layout），即将所有渲染树的所有节点进行平面合成5. 将布局绘制（paint）在屏幕上 In these

Brief introduction There are a number of sources available for how to tune your database systems and applications. DB2 tuning techniques such as OLTP applications (previously published in the ibm®db2® Developer's Garden) some suggestions from table space and index design to buffer pool memory allocation are given through the use of transaction and data parallelism and analysis of query scenarios. These aspects are the basics of performance tuning. H

Through the popularization of the three articles, I believe everyone should have a basic understanding of IIS. Starting from this article, we will start to discuss some practical topics about IIS: how to configure IIS to ensure its performance as high as possible. Series of articles:Configuration of high-availability IIS server for building high-performance. NET Applications-Article 1: required knowledge of

) Reduce or optimize the constant value of the transaction cache loop for each iteration (not necessarily the length of the array is not constantly looking for a fixed value in the loop) if the order of the array items is not related to the task being performed, you can use a backward-forward approach to this scenario. This reduces the number of iterations compared to the operation, but also optimizes the performance(2) Reduce the number of iterations

file storage? In order to avoid this, the data that has been cached in memory is lost due to the fact that the server will be upgraded and will be down, and we have persisted the relevant data locally on the local disk.Four, after the performance optimization to get the EnlightenmentWhat kind of revelation did the project's optimization bring to us?Performance optimization must be based on in-depth analysi

data to disk The size of the Kvbuffer in the mapper default 100M, which can be adjusted by the MAPREDUCE.TASK.IO.SORT.MB (default:100) parameter. Can be adjusted according to the different hardware, especially the size of the memory, it will reduce the number of disk spill at this time if the memory is sufficient, generally will significantly improve performance. Spill usually starts at 80% of the size of the buffer space (since it is possible for ot

Learning Dynamic Performance TableSeventh Article --v$process 2007.5.30This view contains all the process information for the current system Oracle operation. is often used to establish a connection between the operating system process ID of an Oracle or service process and

Software industry in hardware multi-core eraThe previous increase in computational power has been guided by Moore's law, along the path of increasing CPU clock frequency, from the initial dozens of MHz to today's GHz. However, since entering the 2002, the CPU has become more difficult to increase the frequency, because the increase in the frequency of the heat dissipation and power consumption of a large increase and so on. A few years ago, Intel and AMD both tuned the research direction and beg