[转帖]Java IO篇:什么是 Reactor 网络模型?

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

[转帖]Java IO篇:什么是 Reactor 网络模型?

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

[转帖]k8s系列-06-containerd的基本操作

https://www.jianshu.com/p/52a2884594f5 上一篇我们介绍了containerd的安装,本篇我们来简单介绍下如何进行使用。 环境 linux服务器 前置安装 躺过的坑,需要安装下面内容,否则执行ctr run的时候会报错如下: ctr: failed to crea

[转帖]选择mirrorlist 与 baseurl之间的区别

https://www.cnblogs.com/zhoading/p/17108133.html 发现还有一个问题,CentOS-Base.repo 下的mirrorlist 与baseurl mirrorlist指向的就是一堆baseurl(Specifies a URL to a file co

[转帖]技术派-关于最佳线程数的计算的准确理解

Venkat Subramaniam 博士在《Programming Concurrency on the JVM》中提到关于最优线程数的计算: The minimum number of threads is equal to the number of available cores. If a

[转帖]linux中top命令显示不全怎么解决

https://www.yisu.com/zixun/697775.html 这篇“linux中top命令显示不全怎么解决”文章的知识点大部分人都不太理解,所以小编给大家总结了以下内容,内容详细,步骤清晰,具有一定的借鉴价值,希望大家阅读完这篇文章能有所收获,下面我们一起来看看这篇“linux中to

[转帖]find排除一个或多个目录的方法

find排除一个或多个目录的方法 百度就是垃圾,搜索结果千篇一律,错抄错。google一下,总结find排除某个目录的方法: How to exclude a directory in find . command Use the -prune switch. For example, if you

[转帖]一次操作系统报错OutOfMemory Error的处理记录

在启动公司内嵌的tomcat容器时出现报错, 如下: # There is insufficient memory for the Java Runtime Environment to continue.# Native memory allocation (malloc) failed to a

[转帖]ARMv8架构概述、相关技术文档以及ARMv8处理器简介

ARMv8架构 文章目录 ARMv8架构参考文档ARMv8架构的概述从32位到64位的变化The changes from 32 bits to 64 bits1,Larger register pool(更大的寄存器池)2,Wider integer registers(具有更宽的整数寄存器)3,

overcommit_memory的简单学习

overcommit_memory的简单学习 背景 前几天一个测试环境启动失败. 总是有如下的提示: Native memory allocation (mmap) failed to map 12288 bytes for committing reserved memory. 当时看free 其

Python学习之十三_pip的学习

Python学习之十三_pip的学习 pip的含义 pip: pip is the package installer for Python. You can use pip to install packages from the Python Package Index and other in

[转帖]iptables的四表五链与NAT工作原理

本文主要介绍了iptables的基本工作原理和四表五链等基本概念以及NAT的工作原理。 1、iptables简介 我们先来看一下netfilter官网对iptables的描述: iptables is the userspace command line program used to config

[转帖]Full GC (Ergonomics) 产生的原因

发生Full GC,有很多种原因,不仅仅是只有Allocation Failure。 还有以下这么多: #include "precompiled.hpp" #include "gc/shared/gcCause.hpp" const char* GCCause::to_string(GCCause

[转帖]rsar - Extract data from plain-text sar files

sar -A -t -f /tmp/sa11 >/tmp/sar11 https://github.com/ryran/rsar When dealing with sysstat sar data in a sosreport, it's almost always easier to parse

【转帖】【性能提升神器】STRAIGHT_JOIN

今天给大家下另一个性能提升神器-STRAIGHT_JOIN,在数据量大的联表查询中灵活运用的话,能大大缩短查询时间。 首先来解释下STRAIGHT_JOIN到底是用做什么的: STRAIGHT_JOIN is similar to JOIN, except that the left table i

[转帖]Pepper-Box - Kafka Load Generator

https://github.com/GSLabDev/pepper-box Pepper-Box is kafka load generator plugin for jmeter. It allows to send kafka messages of type plain text(JSON,

[转帖]s3fs

https://github.com/s3fs-fuse/s3fs-fuse s3fs allows Linux, macOS, and FreeBSD to mount an S3 bucket via FUSE(Filesystem in Userspace).s3fs makes you op

[转帖]gooyfs 的编译 github

https://github.com/kahing/goofys/issues/527 @maobaolong @PengleiShi I had the same issue as you guys, new to git and had to work it out. Here is what

[转帖]Kafka故障之磁盘打满

https://www.jianshu.com/p/095e820361ae 问:磁盘打满扩容后能正常重启吗?答:不一定 要看文件格式是否损坏(log、index等)。如果损坏会报错:index file due to requirement failed: Corrupt index found,

[转帖]decimal and numeric (Transact-SQL)

https://learn.microsoft.com/en-us/sql/t-sql/data-types/decimal-and-numeric-transact-sql?view=sql-server-ver16 Applies to: SQL Server Azure SQL Databas