博客地址：https://www.cnblogs.com/zylyehuo/ # -*- coding: utf-8 -*- def activity_selection(a): res = [a[0]] for i in range(1, len(a)): if a[i][0] >= res[-1
> 博客地址：https://www.cnblogs.com/zylyehuo/ # 完整版 ```python import os count = 0 # 遍历文件夹 def walkFile(file): for root, dirs, files in os.walk(file): # roo
https://github.com/oldratlee/useful-scripts#-java%E7%9B%B8%E5%85%B3%E8%84%9A%E6%9C%AC 🐌 useful scripts for making developer's everyday life easier an
在服务器的日常维护过程中，会经常用到下面的命令： netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}' 它会显示例如下面的信息： TIME_WAIT 814 CLOSE_WAIT 1 FIN_WAIT1 1 ESTA
https://github.com/jvm-profiling-tools/perf-map-agent A java agent to generate /tmp/perf-.map files for just-in-time(JIT)-compiled methods for us
https://github.com/jvm-profiling-tools/async-profiler This project is a low overhead sampling profiler for Java that does not suffer from Safepoint bi
https://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html#Java MySQL CPU Flame Graph Determining why CPUs are busy is a routine task for performanc
https://github.com/brendangregg/Dump2PNG Visualize file data as a png. Intended for memory or core dumps. This tool is an experiment, intended to char
https://github.com/brendangregg/perf-map-agent A java agent to generate /tmp/perf-.map files for just-in-time(JIT)-compiled methods for use with
shell awk求和 当第一列相同时，对应的第二列相加 awk'{sum[$1]+=$2}END{for(c in sum){print c,sum[c]}}'输入文件名 在Shell中，我们可以用awk实现按列求和的功能，非常简单 1. 简单的按列求和 cat num.txt | awk '{s
https://www.cnblogs.com/kevinlucky/p/9955486.html Transparent Huge Pages (THP) are enabled by default in RHEL 6 for all applications. The kernel attem
首先我们先来看一段代码。 #!/bin/bash declare -i uphosts=0 declare -i downhosts=0 for i in 192.168.152.{98..102}; do if ping -W 2 -c 1 $i &>/dev/null; then echo "$
http://blog.itpub.net/30126024/viewspace-2851971/ https://docs.microsoft.com/zh-cn/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for
https://www.cnblogs.com/leffss/p/15471501.html 两种方法： awk 统计 $ ss -a|grep '^tcp'|awk '{ ++State[$2] } END { for (i in State) print i,State[i] }' LISTEN
http://me.52fhy.com/lua-book/chapter4.html Lua 语言提供的控制结构有 if-else，while，repeat，for，并提供 break、return 关键字来满足更丰富的需求。不支持switch、continue。 Lua 提供的控制语句部分特征类似
一、什么是 Reactor 模型： The reactor design pattern is an event handling pattern for handling service requests delivered concurrently to a service handler by
Brendan Gregg's Blog home CPU Utilization is Wrong 09 May 2017 The metric we all use for CPU utilization is deeply misleading, and getting worse every
文章目录 主机系统环境搭建aarch64虚拟机环境①安装“虚拟系统管理器”②编译安装Qemu for Aarch64③获取aarch64架构的qcow2镜像④使用qcow2镜像文件创建虚拟机⑤开始使用aarch64虚拟机 主机系统环境 OS版本：银河麒麟服务器操作系统V10SP1-x86_64 qe
Windows 磁盘部分性能数据获取 摘要 每次晚上加班总有收获 这次发现了一个fio for windows版本的压测程序, 准备学习和使用一下. https://github.com/axboe/fio/releases 安装 exe 的正常安装不用都说直接使用就可以了. 注意我这变使用的是 x
