linux performance counters

Performance diagnostics for Linux in 60,000 millisecondsWhen you log on to a Linux server in order to solve a performance problem: What should you check in the first minute?At Netflix, we have a huge EC2 Linux cloud, as well as a number of

The translation is as follows:1.1 Linux Process ManagementProcess management is one of the most important functions of the operating system. Efficient process management can ensure a smooth and efficient operation of a program.Linux process management is similar to UNIX's process management. It includes process scheduling, interrupt processing, signaling, process prioritization, context switching, process status, progress memory, and so on.In this sec

, this method is flexible because of the ability to add Objects and counters as the problem becomes clear. Real-time monitoring must be performed when a problem occurs, which is dynamic in the system load and difficult to operate when the problem cannot be re-identified, However, this method is useful if the problem can be reproduced; . Tracing is the collecting of performance data over time to diagnose a

-bit systems. One of the most important differences for an enterprise customer is whether the address of the virtual memory can exceed 4GB. From a performance perspective, it is important to understand how the Linux kernel in 32-bit and 64-bit systems maps physical memory to virtual cores.From Figure 1-10, you can see the obvious difference in how the Linux kerne

Translation: Brother Fei ( http://hi.baidu.com/imlidapeng )All rights reserved, respect other people's labor results, please indicate the author and original source and this statement when reproduced.The original name: "Linux Performance and Tuning guidelines"Original address: http://www.redbooks.ibm.com/abstracts/redp4285.html---------------------------------------------------------------------------------

-identified,However, this method is useful if the problem can be reproduced;. Tracing is the collecting of performance data over time to diagnose a problem. This isGood way to perform remote performance analysis. Some of the drawbacks includePotential for having to analyze large files when performance problems are not repeatable,And the potential for not having a

Introduction: Most of the services are running on Linux, Linux is now a very wide range of applications, but there will still be a lot of problems, we will discuss our performance monitoring metrics, performance monitoring is nothing more than I/O, memory, cpu,tcp connection number, network, Process or thread to start,

This document is a translation of section 1.1 of the IBM Redbook Linux Performanceand Tuning guidelines.Original address:http://www.redbooks.ibm.com/redpapers/pdfs/redp4285.pdfOriginal Eduardo Ciliendo, Takechika Kunimasa, Byron BraswellThe translation is as follows:1.1 Linux Process ManagementProcess management is one of the most important functions of the operating system. Efficient process management can

In March 31, Linux founder Ranas torvalz advocated increasing the number of regular performance tests on the Linux kernel to promptly identify the causes of performance degradation. Currently, only a few of the latest linux kernels have

Linux hard disk Performance Detection and linux hard disk Detection For today's computers, the performance of the entire computer is mainly affected by the disk I/O speed, and the speed of memory, CPU, and motherboard bus has become very fast.Basic detection method 1. dd command The dd command function is very simple.

commands.Valgrind--tool=callgrind./a.outkcachegrind callgrind.out.*Note Kcachegrind is part of the ' KDESDK ' package on my Fedora system, and can be used to read oprofile data (mentioned ABO ve) or profile Python code too.Profiling Hardware EventsI ' ve detailed previously how important, efficient use of the memory hierarchy are for performance. Newer CPUs is providing counters to help tune your use of th

Disk IO performance monitoring (Linux and Windows)End South [email protected]>The IO performance of a disk is an important indicator of the overall performance of a computer. Linux provides the Iostat command to obtain the disk input/output (i.e. IO) statistics, Windows prov

The IO performance of a disk is an important indicator of the overall performance of the computer. Linux provides the IOSTAT command to obtain disk input/output (i.e. IO) statistics, and Windows provides a WMI interface that allows you to write a simple script to get the functionality that is equivalent to Iostat. 1, Linux