, the number of Queries that a database can process Per Second
TPS, Transactions Per Second: number of Transactions processed Per Second
You can view the running status through show status. There are more than 300 status information records. Several Values help us calculate the QPS and TPS, as shown below:
Uptime: the actual number of seconds that the server is running.
Questions: number of queries sent to the database
Com_select: number of quer
hosts the notebook is reset. So this is not suitable for long-term operation, but it is helpful to run fast prototypes on the GPU. )The project cost a total of:
Google calculates 150 hours of GPU uptime on the engine, and 7,700 hours (actual time x cores) of CPU uptime,
Floydhub 292 hours of GPU uptime,
And my university cluster for 1500 hours C
Brief introduction:Expect can perform interactive operation with system for system administratorYum Install Yum which expect # path /usr/bin/expectExample one:Shell >Cat Login. exp#!/usr/bin/ExpectspawnSSH[Email protected]192.168.1.81; expect {"(yes/no)?"{Send"yes\r"; Exp_continue}"Password:"{Send"123456\r"; Exp_continue}"#"{Send"uptime\r"; interact}}# # Use/usr/bin/expect to explain the script, spawn open an SSH process, expect to receive informati
This linux system parameter detection function calculates how much of your current machine's CPU is, how much memory is used, when it runs, and when it is updated.
LINUX system parameter detection including CPU, time, memory, etc.
function Sys_linux (){Cpuif (false = = = ($str = @file ("/proc/cpuinfo"))) return false;$str = Implode ("", $str);@preg_match_all ("/models+names{0,}:+s{0,} ([WS) (.] +) [rn]+/, $str, $model);@preg_match_all ("/cpus+mhzs{0,}:+s{0,} ([D.] +) [rn]+/, $str, $mhz);@preg_ma
meaning of the month and day, change him to the YM is to save the attachment by the month.According to my test on Ma Haixiang blog site, this function seems to be not perfect, only in the FCK upload function upload files or automatically generated thumbnails can play a role. On this point you can test it in the background to know. "Upload" The new file when the date is automatically generated by month and day storage. If you want to completely solve this problem, you need to carefully look at t
1. Concept of average load in Linux
Sometimes we feel that the system response is slow, but we cannot find the cause. Now we need to check the average load to see if there are a large number of processes waiting in the queue. The average number of processes in the running queue within a specific interval can reflect the system's degree of busyness. Therefore, we usually check the system load as soon as our website or system slows down, that is, the average CPU load.
2. View average load
How shou
150 Common Linux command summariesOnline Enquiry and Help commands (2)Mans HelpFile and Directory Operations commands (13)ls tree pwd mkdir rmdir CD touch CP MV RM Ln Find renameView file and Content processing commands (22)Cat tac more less head tail cut split paste sort uniq WC iconv Dos2unix file diff vimdff chattr lsattr rev grep EgrepFile compression and Decompression commands (4) Tar unzip gzip zipInformation display commands (12)uname hostname dmesg u
First, copy the file to the specified folder firstHere I choose to create a new WWW folder under/var to storeCopy the contents of the blog folder to the WWW folder1 sudo cp-r/home/jakeychen/jakey/blog//var/www/1 [email protected]:/var/www/blog$ sudo service supervisor restart2restarting Supervisor:supervisord. 3 [email protected]:/var/www/4 tornadoes:tornado-8000 RUNNING pid 10949, uptime 0:00:085 tornadoes:tornado-8001 RUNNING
}Second, Hrtimer high-precision timer, can be achieved NS level, here to do milliseconds as follows:Note: The actual is the nanosecond level, where Ktime_set (const long secs, const unsigned long nsecs) is determined, parameters can be achieved in the nanosecond level.#include #include #include #define KER_PRINT (FMT, ...) printk ("static struct Hrtimer Vibe_timer;static struct work_struct vibe_work;static int value = 2000; /* Note: In milliseconds ms Time out setting,2 seconds */static enum Hrt
Linux Viewing system boot timeSometimes you need to see how long the Linux system is running, you need to know the last boot time, sometimes due to power failure or sudden outage of power supply, you need to check the Linux boot time/restart time; The following summarizes some of the ways to view Linux open machine time (very comprehensive)1:who Command ViewWho-b View the last time the system started.Who-r View current system run time[Email protected] ~]# Who-bSystem Boot May 11 09:272:last rebo
you do not add parameters at the time of installation, you can modify the registry information to set up, open the registry, find hkey_local_machine\system\currentcontrolset\services\ Memcached has a "ImagePath" entry with a value of: "C:\Memcached\memcached-win32-1.4.4-14\memcached.exe"-D Runservice followed by "-M 1024-c2048 ". such as: 3, enter the stats command, the page appears the parameters introduced. stat PID 4356 Server process idstat uptime
This article describes the performance testing of Linux comes with commands, detailing the use of these Linux-brought tools.First, uptimeThe results of the uptime command include how long the server has been running, how many logged-in users, and the overall evaluation of server performance (load average). The load average values are recorded for the last 1 minutes, 5 minutes, and 15 minute intervals, and load average is not a percentage, but the numb
For some people it doesn't matter how long the system has been running, but this is important information for the server administrator. When the server is running important applications,Must try to ensure long-running stable operation, and sometimes even require zero downtime. So how do we know how long the server has been running? In the Linux system, the following methods can be used to query.1.uptime Command2. View the/proc/
First, write
Usage: Write user name; After hitting the carriage, oneself and the other party will be in the same state of chatting, but the person who initiates the connection can only receive the chat content of the person who initiates the chat request, but cannot reply, if want to reply, must initiate the connection to the other party first, so two people can chat, Note that root can initiate a connection to any, but other people cannot initiate a connection to root, by default the message r
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