Introduction
Iostat is mainly used to monitor the IO load of system devices. iostat displays the statistics from the start of the system when it is run for the first time. After iostat is run, statistics from the last run of the command are
From: http://linux.chinaitlab.com/command/764778.html
The top command is a common performance analysis tool in Linux. It can display the resource usage of various processes in the system in real time, similar to the Windows Task Manager. The
The top command is a common performance analysis tool in Linux. It can display the resource usage of various processes in the system in real time, similar to the Windows Task Manager. The following describes how to use it.
Top-01:06:48 up, 1
Basic machine inspection knowledge
Inspection is generally done by the manufacturer or agent.First, check the room temperature and humidity. Of course, these situations are normal.Reference Value: temperature (℃) 10 ℃-40 ℃Humidity: 8%-80%Second:
Http://blog.csdn.net/zhanglianpin
Start the UCOS task creation procedure:
1. initialize the task stack.
2. initialize the task control block.
3. Set the created task to the ready state (that is, the ready table)
We have already mentioned the task
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Arm Assembly programming is essentially a programming of CPU registers. So we need to first find out what registers arm has? How are these registers used?
Arm registers are classified into two
Basic concepts of Interruption
Program interruption is generally referred to as interruption. It means that the CPU is interrupted by running programs due to pre-selection or various random internal or external events, it is transferred to the
60 required commands for Linux (3)-system management
60 required commands for Linux: system management commandsSystem Management commands required for LinuxAuthor: Cao yuan, his posting date: 2004.10.18For Linux systems, whether it is a central
1. Concepts of operating system virtual machines
Running the operating system on bare metal is called an operating system virtual machine.
2 processor state: core State, tube state, user State, Mutual Difference
Core State: the State of the
After the basic functions of the system clock generator are established, the scg1, scg0, cpuoff, and oscoff bits of the SR in the CPU are important low-power control bits. As long as any interrupt is responded, the above control bit is pushed into
Preface
Whether it's a blog or csdn, we can see that many of our friends have not broken through a bottleneck in understanding and understanding the database. This bottleneck is often just a window, and you will see a new world.
During project
Basic operating commands for the System
1. root/catanaconda-ks.cfg to determine whether to install base software group
Yum groupinstall base can be used to install the base group ifconfig command or use ip addr sh to view IP information.
To use
Linux top, linux
Linux top commands
Enter top in the terminal and the result is as follows:
1: first line, system status
19:12:02 ----> current system time
6 min -------> the system has been started for 6 minutes.
1 use -------> only one user
Detailed explanation of iostat commands for real-time IO monitoring in CentOSIntroduction
Iostat is mainly used to monitor the IO load of system devices. iostat displays the statistics from the start of the system when it is run for the first time.
Sar is a very useful system observation command in linux. It can observe disk io, cpu, block device, memory, swap, and other information to help us review the operating system status. The following lists some common system status display
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
Linux performance monitoring command vmstat
I. Overview
Monitoring is usually divided into machine monitoring and service monitoring. Machine Monitoring is the basic monitoring to obtain the current running status of the system. service monitoring
Common tuning methods in linux and common tuning methods in linux
Performance Tuning is one of the most important tasks for O & M engineers. If your production environment experiences slow system response speed, abnormal hard disk I/O throughput,
Introduction to common linux performance monitoring tools and linux performance monitoring tools
Record several frequently used ones.1. top/htop
As we all know about top, there are several common parameters: (you can also start and interact)
-D: Set
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