linux performance counters

Then the last blog post continues to "top" Monitoring Linux Performance 25 command-line tools10:mpstat--Shows the occupancy of each CPUThis command can show the occupancy of each CPU, if there is a particularly high CPU utilization, then it is possible that a single-threaded application caused bympstat-pall1linux3.13.0-75-generic (LNMP) 06/25/2016_x86_64_ (2 CPU) 02:28:59pmcpu%usr%nice %sys%iowait%irq%soft%

chariot products for its wireless products application layer performance testing. As a standard tool for application layer performance testing, Chariot is able to provide operators with a variety of other tools irreplaceable services due to its network environment features, with the following applications: Equipment selection, benchmark performance testing, stre

performance test: CPU memory, HDD IO read/write, bandwidth speed, Unixbench First, CPU physical number, kernel, hyper-threading, multi-core 1, login terminal, execute: cat/proc/cpuinfo, will show the VPS host CPU detailed parameters, such as the core, frequency, model and so on, the following is my Linux system host CPU:2, the main parameter physical_id represents the number of physical CPUs, CPU cores is

Tags: process detail multiple Files next ROC WAP Order administrator manyNow most of the environment that MySQL runs is on Linux, how to optimize on the Linux operating system according to MySQL, we give some general simple strategy here. These methods help improve the performance of MySQL.Now most of the environment that MySQL runs is on

Linux has a number of excellent tools to help us analyze the performance metrics of the server and assist in the development of debugging work. The following lists only the underlying commands and are generally integrated into a Linux environment without having to be installed again. More detailed commands can refer to the Https://github.com/brendangregg/perf-too

The importance of Linux based Web server performance testing Linux, as a free open source operating system, is becoming more and more important to people. With the advent of a stable Linux 2.4 kernel release date and the introduction of the Intel IA-64 architecture, Linux's share of the market for server operating sys

Talking about linux Performance Tuning 12: Red Hat optimization strategy Tuned talking about linux Performance Tuning 11: Memory Allocation Management http://www.bkjia.com/ OS /201307/228761.html Red Hat launched a dynamic tuning solution, you can use different tuning schemes in different time periods. Because it exist

A disk is usually the slowest subsystem of a computer, and it is also the most prone to performance bottlenecks, because the disk is the farthest from the CPU and the CPU access to the disk involves mechanical operations, such as rotating shafts and track searching. The speed difference between hard disk access and memory access is calculated by an order of magnitude, just like A disk is usually the slowest subsystem of a computer, and it is also the

I. Preface1) Linux Proc file system, through Proc file system adjustment, to achieve performance optimization.2) Linux performance diagnostic tool: describes how to use the diagnostic tool provided by Linux for performance diagnos

() can be any combination of MCL_CURRENT and MCL_FUTURE, they represent "Keep allocated address space resident physical memory" and "keep future allocated address space resident physical memory ". For Linux, this is very domineering for functions. Only the root user has the permission to call them. 2. shmget () and shmat ()This function can apply to the operating system for Large Page memory (Large Page ). The large page memory features pre-allocated

memory and swap are functionally identical, except for the difference in performance between physical storage components (memory and disk). The operating system will swap in and out according to the characteristics of the program using memory, leaving the physical memory as much as possible to the program that needs it most. However, this scheduling is based on a predetermined set of rules, and does not fully meet the needs of the program. Some speci

This article mainly introduces some basic knowledge about Linux cpu performance testing. first, we will introduce sched in Linux kernel. The scheduler is responsible for two types of resources in the scheduling system: thread and interrupt. The scheduler gives different priorities to different resources. Linux testing

Linux2.6 is 110KB, which limits the connection bandwidth to 22 MB/s. the calculation method is as follows: Throughput = window_size/RTT 110 KB/0.050 = 2.2 MB/s Use the window size calculated above to get a bandwidth of 12.5 MB/s, that is: 625 KB/0 050 = 12.5 MB/s The difference is great, and it can provide a larger throughput for the Socket. You can calculate the optimal buffer size based on your Socket. Socket provides several Socket options, two of which can be used to modify the size of the

Why do you want performance tuning? Most Linux distributions are designed to be fully compatible with most computers in the marketplace. This is a fairly mixed set of hardware (hard drive, video card, NIC, etc.). So Red Hat, Suse,mandriva and some other distribution vendors have chosen some conservative settings to make sure the installation is successful.Simply put: Your distribution is running well, but

Turn from 51Testinghttp://bbs.51testing.com/viewthread.php?tid=116526Often see a lot of people talk about LoadRunner to Linux/aix performance monitoring too little, indeed, LR for non-Windows platform monitoring is too little, but we can use IBM's Nmon for performance analysis, this is a great tool, on the official website of IBM:Http://www-941.haw.ibm.com/collab

The importance of Linux based Web server performance testing Linux, as a free open source operating system, is becoming more and more important to people. With the advent of a stable Linux 2.4 kernel release date and the introduction of the Intel IA-64 architecture, Linux's share of the market for server operating sys

Top The top command is one of the most popular performance tools. Most system administrators run top to view the operation of Linux and UNIX systems. The top utility provides an ideal way to monitor process and overall Linux performance. It's more accurate to call Linux proc

Common linux commands for Performance Testing Common linux commands for performance testing. 1. uptime [Root @ smgsim02 ~] # Uptime15:08:15 up 98 days, 2 users, load average: 0.07, 0.29, 0.14The number of times the system has been running since the current time the number of users logging on to the current system is

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 in-depth understanding. 1. Main Features of Linux Performance Test

Monitoring is the core task of cluster management. Monitoring data can be used for scheduling tasks, load balancing, reporting software and hardware faults to administrators, and extensively controlling system usage. The monitoring information must be obtained without affecting the cluster performance. This article will discuss how to use the/proc file system and Java to obtain monitoring data. Java applications in