kilobytes to gigabits

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Linux commands: Top command

Meaning Pid Process ID PPID Parent Process ID Ruser Real User Name Uid User ID of the process owner USER User name of the process owner GROUP Group Name of Process owner Tty The terminal name of the startup process. Processes that are not started from the terminal are displayed as? PR Priority level NI Nice value. Negativ

Vmstat and Iostat detailed

information for the output is displayed only once for periodic cyclic output, delay is the latency between two outputs, and count refers to the number of times that the time interval is calculated. For vmstat output The meaning of each field, you can run the man Vmstat view. Monitoring I/O subsystem conditions with Iostat Iostat is an abbreviation for I/O statistics (input/output statistics), and the Iostat tool will monitor the system's disk operation activities. It is characterized by reporti

How to view the average load on a Linux machine

P Last CPU used, only meaningful in multi-CPU environment %cpu CPU time consumption percentage last updated to current Time Total CPU time used by the process, in seconds time+ Total CPU time used by the process, Unit 1/100 sec %MEM Percentage of physical memory used by the process VIRT The total amount of virtual memory used by the process, in

Top of Linux commands

environment. %cpu use of the CPU. The percentage of CPU time that the task has elapsed since the last screen refresh, in total CPU time. Time of the CPU (in seconds). The total CPU time that the task has been using since it was started. When ' cumulative mode ' is on, each process lists the CPU time used by its and its dead child processes. Time+ CPU time, 1% seconds. Same as time but accurate to percentile. %MEM Memory Usage (RES). The amount of available physical memory that the task is curre

Nginx Performance Optimization

./dev/sdb1 /dataext3 defaults 0 Modify to the following configuration:/dev/sdb1 /dataext3 defaults,noatime,nodiratime 0 Then reboot the system to make it effective.Or do not restart the system, you can use the Remount option to re-mount:-->mount -o defaults,noatime,nodiratime -o remount /dev/sdb1 /sdb-->mount | grep sdb1/dev/sdb1 on /sdb type ext3 (rw,noatime,nodiratime)If it is a separately mounted partition or disk, you can execute the command directly:-->mount -o defaul

System performance monitoring Tool-Pidstat

refreshes and outputs once every 3 seconds, 3 times after the program exitsPidstat-p 1 2 3-l07:18:58 AM PID%usr%system%guest%cpu CPU Command07:18:59 AM 1 0.00 0.00 0.00 0.00 0/sbin/init07:19:00 AM 1 0.00 0.00 0.00 0.00 0/sbin/init07:19:01 AM 1 0.00 0.00 0.00 0.00 0/sbin/initAverage:1 0.00 0.00 0.00 0.00-/sbin/init%USR: The CPU usage of the process in the user state.%system: CPU utilization of the process at the kernel state (System level).%CPU: The total CPU utilization of the process, if in SM

Sort (not excerpted)

the DIRECTORY parameter.-Y [kilobytes] starts the sort command with the number of kilobytes of the primary storage specified by the kilobytes parameter, and increases the storage capacity as needed.(If the value specified by the kilobytes parameter is smaller than the minimum storage site or greater than the maximum s

Always disk checking

completed. CHKDSK is verifying indexes... Index verification completed. CHKDSK is verifying security descriptors... Security descriptor verification completed. 12372 kilobytes total disk space. 3 kilobytes in 1 user files. 2 kilobytes in 1 indexes. 4217 kilobytes in use by the system. 8150

Linux-use the pidstat command to monitor the resource usage of a process

of reports generated at interval seconds apart. if the interval parameter is specified without the Count parameter, the pidstat command generates reports continuously.You can select information about specific task activities using flags. not specifying any flags selects only CPU activity.Options -C comm Display only tasks whose command name provided des the string comm. -D Report I/O statistics (kernels 2.6.20 and later only). The following values are displayed: PID The identification number of

Linux Performance Test Command-----Top

memory is swapped out again, it is no longer necessary to write to the swap area.Process Information Area Pid Process ID PPID Parent Process ID USER User name of the process owner PR Priority level NI Nice value, i.e., priority correction, negative for high priority, positive for low-priority VIRT The total amount of virtual memory used by the process, in

Disk optimization for Linux performance Optimization (iii)

so on. If you want to learn more about Linux systems, it is recommended to purchase related books for systematic learning. Below we describe how to analyze disk performance tools (in fact, not just disks):IostatSummarizes statistics on individual disks, providing metrics for disk load, usage, and saturation. A single line of system summary information is displayed by default, including the kernel version, hostname, log, schema, and number of CPUs, each of which contains one line of disk devices

The Linux top command is detailed

consumption percentage L time Process CPU total, per second M time+ Total CPU time used by the process, units 1/100 seconds N%MEM the percentage of physical memory used by the process o The total amount of virtual memory used by the VIRT process, in kilobytes. The Virt=swap+res P swap process uses the amount of virtual memory that is swapped out, in kilobytes. The size, in

Basic memory management knowledge of Linux system

megabytes of RAM and 512 MB of swap space. The third line of output (Mem:) shows physical memory. The total column does not show the physical memory used by the core (typically around 1MB). The Used column shows the total amount of memory being used (the second row does not count as buffering). The free column shows all unused memory. Shared columns show the total amount of memory shared by multiple processes. The Buffers column displays the current size of the disk cache. Line five (swap:) on

Linux Performance monitoring: Memory

introduction. The following data comes from a 256MB ram,512mb SWAP Xen VPS in Vpsee:# vmstat 1procs-----------memory-------------Swap-------io------System-------CPU------R B SWPD Free buff cache si so bi bo in CS us sy ID WA St 0 3 252696 2432 268 7148 3604 2368 3608 2372 288 288 0 0 21 78 1 0 2 253484 2216 228 7104 5368 2976 5372 3036 930 519 0 0 0 100 0 0 1 259252 2 616 128 6148 19784 18712 19784 18712 3821 1853 0 1 3 95 1 1 2 260008 2188 144 6824 11824 2584 12664 2584 1347 1174 0 0 (0 2 1

Java memory and garbage collection tuning

. Memory and garbage collection data are printed every second. Let's come together to understand the meaning of each column: s0c and s1c: This column shows the current size (in kilobytes) of the SURVIVOR0 and Survivor1 regions. s0u and s1u: This column shows the current usage of the Survivor0 and Survivor1 zones (in kilobytes). Note: At any time, there will always be a survivor area that is em

Set up your own FTP server serv-u detailed configuration graphics tutorial [recommended]_FTP Server

bandwidthSettings information for the server%maxusers-Displays the maximum number of users that the server can log on at the same time%maxanonymous-Displays the maximum number of anonymous users that the server can log on at the same timeUser Information%name-Displays the login username%ip-Displays the user IP address of the login%dir-Displays the current directory for the logged in user%disk-Displays the current disk for the logged in user%dfree-Displays the current disk space for the logged i

==>top of Linux monitoring commands

Tty The terminal name of the startup process, and the process that is not started from the terminal is displayed as? PR Priority level NI Nice value, negative indicates high priority, positive values indicate low priority P Last CPU used, only meaningful in multi-CPU environment %cpu CPU time consumption percentage last updated to current Time Total CPU time used by the process, in

Audio and video parameters of streaming media

Audio and video parameters of streaming media Definition Resolution is an important concept related to images. It is a technical parameter for measuring the expressiveness of image details. High resolution is an important prerequisite for ensuring the clarity of the Color Monitor. Resolution indicates the precision of the screen image, that is, the number of points that the display can display. Generally, the "resolution" is expressed as the number of pixels in each direction. The higher the Res

Conversion Relationship of common energy consumption

There are many types of energy, and the amount of heat is also different. In order to facilitate mutual Comparison and Research on the total amount, China will put each kilogram containing 7000 calories (29306 kilo) standard Coal, also known as standard coal. In addition, China often converts all kinds of energy into tons of standard coal, for example, the energy of 1 ton of straw is equivalent to 0.5 tons of standard coal, 1CubeThe energy of Rice biogas is equivalent to 0.7 of standard coal.

Analysis of Linux slow running in Linux

3 31    The fields have the following meanings:    Disk name of the disk R/s reads per second W/s writes per second Kr/s kilobytes read per second Kw/s kilobytes written per second Wait average number of transactions waiting for service (Q length) Actv average number of transactions actively Being serviced (removed from Queue but not yet Completed) % W percent of time there are transactions waiting For ser

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