aix performance monitoring commands

Dstat produces meaning:During performance testing, we generally need to detect many aspects of data, including CPU usage, memory usage, network conditions, load average, process information, disk information, and so on. These data can generally be monitored using commands provided by the system, but in general, these commands are scattered, such as Vmstat,iostat,

Linux system has a performance problem, generally we can use top, iostat, free, vmstat and other commands to view the initial positioning problems. Where iostat can provide richer IO performance status data.1. Basic use$iostat -d -k 1 10The parameter-D indicates that the device (disk) usage status is displayed; k Some columns that use block are forced to use kilo

multiple processors) u Show specific user processes M Sort by memory usage P Sort by CPU usage T use Sort by time+ F Trace Process: If the sort order causes the selected process to move around the list, let the selected bar follow the process. This is useful for monitoring a process, and in this way you can keep a process visible on the screen. Using the arrow keys will stop the function. K Show/Hide Kernel threads H Show/Hide User t

performance and business to set), so set a big meaningless. If you set a reasonable value, you reach this value and MongoDB the new connection request to avoid being dragged down by too many connections.2.indexcounters:btree:misses index of the number of misses, and the ratio of hits to consider whether the index is correctly established. You see my "missratio": 3.543930204420982e-7, very healthy bar. So the miss rate can also be seen in Mongostat.3.

If you want to know what your server is doing, you need to know some basic commands, and once you've mastered these commands, you're a professional Linux system administrator.Some Linux distributions provide GUI programs to monitor the system, for example, SUSE Linux has a great and professional tool Yast,kde KDE system Guard is also excellent. Of course, to use these tools, you have to operate in front of

10.6 Monitoring IO PerformanceIostat-x View disk Usage There is a very important indicator%util, the larger the value, the more the hard disk is occupiedIotop commands need to be installedIotop is also a dynamic display, focusing on the IO column10.7 Free Commandfree-m/-g/-h Command usageThe difference between buffer and CacherDisk-to-memory (cache)--GT;CPUCpu--> memory (buffer)--disk10.8 PS CommandPS aux |

kilobytes (KB) Amount of memory used (in kilobytes) Number of packets received per second Number of packets emitted per second Total number of processes How to use ScriptsTo run this script automatically, you need to set up a cron task and set the frequency of the operation according to the actual situation. I find it a good choice to run every five minutes. The script does not need to run as root, so we do not have to assign high permissions to it.If an item in the

If you want to know what your server is doing, you need to know some basic commands, and once you've mastered the commands, you're a professional Linux system administrator. Some Linux distributions provide GUI programs for system monitoring, such as SUSE Linux has a great and professional tool yast,kde the KDE System Guard is also excellent. Of course, to use t

displayed, and each item can be consulted. Need to observe the value of the ID (idle), generally speaking, he should be close to 100%, indicating that the system is rarely used resourcesLines Fourth and fifth: represents the current use of physical memory and virtual memory (MEM/SWAP).after line sixth: This is where the state is displayed when the command is entered in the top program. The picture below the top is the resource situation used by each process.By default, only the more important P

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. After iostat is run, statistics from the last run of the command are displayed. You can specify the number and time of statistics to obtain the required statisti

with Semkey -s semid removal of signals identified with Semid 5.uptimeThe following information is displayed in turn: The current time, how long the system has been running, how many users are currently logged in, the average load of the system in the past 1 minutes, 5 minutes, and 15 minutes.6.freeView the size of the memory space in the system.7.topThe system performance can be viewed dynamically, and the CPU, memory usage resources and re

Linux system monitoring has the following commands: Uptime: Display system load condition Mpstat: Show CPU performance Free: Displaying memory usage Vmstat: Displaying virtual memory usage Iostat: Show System I/O activity Netstat: Displays the activity of the network DF/DU: Displaying disk usage 1. Uptime fdipzone@ubuntu:~$ uptime 00:06:00 up min, 2

Original address: http://www.ha97.com/4546.html　　Linux system has a performance problem, generally we can use top, iostat, free, vmstat and other commands to view the initial positioning problems. Where iostat can provide richer IO performance status data.1. Basic use$iostat -d -k 1 10The parameter-D indicates that the device (disk) usage status is displayed; k S

Linux performance monitoring software (Perf, PAPI) Installation tutorial, perfpapi Perf Perf is a built-in Linux kernel performance tool. The installation process is as follows: 1. Download a Linux kernel source code and decompress it into tools/perf. 2. Open the terminal and install make make install. 3. After installation, you can run the perf program in this

Linux system has a performance problem, generally we can use top, iostat, free, vmstat and other commands to view the initial positioning problems. Where iostat can provide richer IO performance status data.1. Basic use$iostat -d -k 1 10The parameter-D indicates that the device (disk) usage status is displayed; k Some columns that use block are forced to use kilo

Brief introduction:Vector is Netflix's open-source, host-level performance monitoring framework that provides carefully selected high-resolution system and application metrics to every engineer's browser.Logging on to the system and running a large number of commands from the shell is an option, but often the complexities involved may be an obstacle for engineers

The commands for performance monitoring analysis include the following:1, Vmstat2. Sar3, Iostat4. Top5. Free6, uptime7, Netstat8, PS9, Strace10, LsofCommand Description:The free command is the most common command for monitoring Linux memory usageSyntax format:free [options]Parameter description:-M: View content usage i

This article mainly introduces the linux performance monitoring tool. For more information, see 1. uptime This command intuitively shows the average load of the server in the past 15 minutes, 5 minutes, and 1 minute 2.Vmstat Output vmstat information every 2 seconds, 10 times in total. Category Procs Swap Io System Cpu R: Number of running processes Si

function is obtained from the/root/system.map file. FLAGS and process-related digital IDs 1.10 Watch1.10.1 Command DescriptionReal-time monitoring commands, as well as commands to detect other command run conditions1.10.2 parameter Description-D Highlighting changes-N Period (seconds)1.10.3 Result DescriptionWatch–d–n 1 Netstat-antMonitor the network ev

Objective:Performance optimization is a commonplace topic, typical performance problems such as slow page response, interface timeout, high server load, low number of concurrency, database frequent deadlock and so on. Especially in the "rough fast" Internet development model of the big line today, with the increasing number of system access and code bloated, a variety of performance problems began to pour.T