linux performance counters

has been completed. Back to Top System Optimization for AIO The proc file system contains two virtual files that can be used to optimize the performance of asynchronous I/O: The/proc/sys/fs/AIO-Nr file provides the current number of System-range asynchronous I/O requests. The/proc/sys/fs/AIO-max-Nr file is the maximum number of concurrent requests allowed. The maximum number is usually 64 KB, which is sufficient for most applications. Back to

For Linux SA, server performance needs our special attention, including CPU, IO, memory and so on, the optimization of the system becomes crucial, here is reproduced a very good article about IO optimization for your reference and learning: first, about the page cache information, you can use cat/proc/ MeminfoSee. The cached refers to the memory size (Diskcache-swapcache) used for Pagecache. With the write

Article Title: Improving Linux system performance to accelerate network applications. 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. When developing a socket application, the first

Linux provides a very good file Virtual System (/proc) to monitor system performance. The/proc file virtual system is a mechanism used by the kernel and kernel module to send information to processes. It exists in the memory instead of the hard disk. The main functions of the/proc file virtual system include process information, system information, CPU information, load information, and system memory inform

Today, many versions of Enterprise Linux have been released, such as the familiar RHEL, CentOS, and Scientific. So what kind of gradual progress does the performance evolution of these Enterprise Linux versions present? Next, we need to refer to ScientificLinux5.7, ScientificLinux6.2, and Fedora16 (as a RedHatEnterpriseLinux7

start MySQL to take effect. Another complicated method is to specify that MySQL uses the Large Page memory (Large Page ). On Linux, the large page memory will not be swapped out of the physical memory, which is similar to memlock. I previously introduced four methods for MySQL to avoid using swap. The Principle and Implementation Mechanism need to be supplemented here. If you are not interested in Linux AP

Linux System and Performance Monitoring (Network)Date: 2009.07.21Author: Darren HochTranslation: Tonnyom [AT] hotmail.com Followed by the first three articles:Linux System and Performance Monitoring (CPU)Linux System and Performance Monitoring (Memory)

The performance differences between LINUX and UNIX are almost identical in terms of functions. linux is developed by imitating unix functions, so it is called unix-like ......In terms of performance, although linux has become more and more replace unix with the development o

Tags: How many performance relationship resources native Web Services tuning strThe Vmstat command is the most common Linux/unix monitoring tool that can show the status of a server at a given time interval, including server CPU utilization, memory usage, virtual memory exchange, IO Read and write situations. Compared to top, the Vmstat can see the CPU, memory, and IO usage of the whole machine, instead of

Linux Performance Testing Tool Lmbench is a simple and Portable Micro-evaluation tool that complies with the ANSI/C standard for UNIX/POSIX. In general, it measures two key features: Response Time and bandwidth. Lmbench aims to give system developers an insight into the underlying costs of key operations. 1. Use and introduction of Linux

When there is a problem with the Linux system, we not only need to look at the system log information, but also use a lot of performance monitoring tools to determine what part (memory, CPU, hard disk ...). ) out of the question. In the Linux system, all the operating parameters are saved in the virtual directory/proc, in other words, we use the

In Linux, how does one set RAID 10 to ensure high-performance and fault-tolerant disk input/output? (1) RAID 10, also known as RAID 1 + 0 or image strip) array combines the features of RAID 0 and RAID 1 to provide high-performance, fault-tolerant disk input/output operations. In RAID 0, read/write operations are performed across multiple drives concurrently; in

Although valve introduced steam and games to the Linux platform, the father of GNU worried that the anti-piracy mechanism against the free and open source principles of DRM, however, the support of mainstream game vendors in Linux systems is still a milestone, which is still a major advantage and disadvantage for promoting the development of Linux. Valve is not a

Linux performance optimization 7: Cropping System Services 6: selecting IO scheduling algorithms http://www.2cto.com/os/201307/228389.html Generally, application services are deployed. for a single server, only a single service is provided. even cluster technology and distributed technology are used for multiple servers... linux

If you are looking for a very easy-to-use Linux performance monitoring tool, I strongly recommend installing and using the Nmon command line utility. Nmon Monitoring Tool Nmon is a system administrator tuning and benchmarking tool that displays performance data for the following: Processor Memory Network Disk File System Network File System NFS) P

OverviewFor the behavior of the network, can be divided into 3 paths: 1) Send path, 2) forwarding path, 3) receive path, and network performance optimization can be based on these 3 paths to consider. Since the forwarding of packets is generally concerned with the device with the routing function, it is not described in this paper, if readers are interested, they can learn by themselves (in the Linux kernel

Linux-CPU performance optimization, Preface What is performance optimization? In my opinion, performance optimization aims to improve application or system capabilities. So how can we optimize the performance of the application? We have designed a lot of content here, inclu

Recently, I am preparing to change the VPS. If VPS supports FreeBSD, I plan to try it. If you want to know the differences between it and linux performance, you can find some articles on the Internet. Many articles have mentioned that FreeBSD is more suitable for front-end file servers. Its database performance and SMP perfor