stress | 易学教程

httpd process always 256

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问题 I am using Amazon EC2 and apache 2.4, when I conduct stress tests, the httpd max processes is always 256 [ec2-user@xxxxxx]ps aux | grep httpd 259 httpd conf <IfModule mpm_prefork_module> StartServers 10 MinSpareServers 10 MaxSpareServers 64 ServerLimit 1600 MaxClients 1600 MaxRequestsPerChild 3000 </IfModule> MPM conf LoadModule mpm_prefork_module modules/mod_mpm_prefork.so httpd -V Server MPM: prefork threaded: no forked: yes (variable process count) maybe I am missing something? 回答1: Make

httpd process always 256

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stress --压力测试软件

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stress 命令主要用来模拟系统负载较高时的场景 ubuntu下安装 zw@zw-pc:apt-get install stress zw@zw-pc:apt-get install htop #top的增强版，比较直观 zw@zw-pc:stress --help `stress' imposes certain types of compute stress on your system Usage: stress [ OPTION [ ARG ] ] .. . -?, --help show this help statement --version show version statement -v, --verbose be verbose -q, --quiet be quiet -n, --dry-run show what would have been done -t, --timeout N timeout after N seconds --backoff N wait factor of N microseconds before work starts -c, --cpu N spawn N workers spinning on sqrt ( ) #产生 N 个进程，每个进程都反复不停的计算随机数的平方根 -i, --io N spawn N

Linux stress 命令

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stress 命令主要用来模拟系统负载较高时的场景，本文介绍其基本用法。文中 demo 的演示环境为 ubuntu 18.04。基本语法语法格式： stress <options> 常用选项： -c, --cpu N 产生 N 个进程，每个进程都反复不停的计算随机数的平方根 -i, --io N 产生 N 个进程，每个进程反复调用 sync() 将内存上的内容写到硬盘上 -m, --vm N 产生 N 个进程，每个进程不断分配和释放内存 --vm-bytes B 指定分配内存的大小 --vm-stride B 不断的给部分内存赋值，让 COW(Copy On Write)发生 --vm-hang N 指示每个消耗内存的进程在分配到内存后转入睡眠状态 N 秒，然后释放内存，一直重复执行这个过程 --vm-keep 一直占用内存，区别于不断的释放和重新分配(默认是不断释放并重新分配内存) -d, --hadd N 产生 N 个不断执行 write 和 unlink 函数的进程(创建文件，写入内容，删除文件) --hadd-bytes B 指定文件大小 -t, --timeout N 在 N 秒后结束程序 --backoff N 等待N微妙后开始运行 -q, --quiet 程序在运行的过程中不输出信息 -n, --dry-run 输出程序会做什么而并不实际执行相关的操作 -

`tce-load -wi stress` doesn't work?

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问题 I want to install the stress command in docker machine, but when I run: tce-load -wi stress It fails: Downloading: stress.tcz Connecting to repo.tinycorelinux.net (89.22.99.37:80) wget: server returned error: HTTP/1.1 404 Not Found md5sum: stress.tcz.md5.txt: No such file or directory Error on stress.tcz But if I install nano : docker@daocloud:~$ tce-load -wi nano nano.tcz.dep OK Downloading: file.tcz Connecting to repo.tinycorelinux.net (89.22.99.37:80) file.tcz 100% |***********************

How to request nodal stress output in ABAQUS Python script

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问题 I need nodal stresses in the odb. I am aware that I can simply generate a query in the visualization module and therefore can obtain the averaged nodal stress (which I dont think will be of use as its performed after the analysis and I cannot do that in the odb as there is no nodal information for stresses). I can also edit the input file and use Position = NODES in the element output and then running the analysis by calling the input file as source. It generates stresses with nodal data and

DB (SQL) automated stress/load tools?

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I want to measure the performance and scalability of my DB application. I am looking for a tool that would allow me to run many SQL statements against my DB, taking the DB and script (SQL) file as arguments (+necessary details, e.g. host name, port, login...). Ideally it should let me control parameters such as number of simulated clients, duration of test, randomize variables or select from a list (e.g. SELECT FROM ... WHERE value = @var, where var is read from command line or randomized per execution). I would like to test results to be saved as CSV or XML file that I can analyze and plot

DB (SQL) automated stress/load tools?

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问题 I want to measure the performance and scalability of my DB application. I am looking for a tool that would allow me to run many SQL statements against my DB, taking the DB and script (SQL) file as arguments (+necessary details, e.g. host name, port, login...). Ideally it should let me control parameters such as number of simulated clients, duration of test, randomize variables or select from a list (e.g. SELECT FROM ... WHERE value = @var, where var is read from command line or randomized per