auth_delay让服务器在报告身份验证失败前短暂暂停，以增加对数据库密码进行暴力破解的难度。需要注意的是，这对阻止拒绝服务攻击毫无帮助，甚至可能加剧攻击，因为在报告身份验证失败前等待的进程仍会占用连接。要使用这个模块必须要在postgresql.conf中配置参数shared_preload_libr

一台windows服务器，要部署jar，启动成功，却无法正常请求。会报错：InetAddress.getLocalHost().getHostName()took20021millisecondstorespond.Pleaseverifyyournetworkconfiguration.经查，该服务器启动了一个其他服务，该服务占用了所有的网络请求带宽，导致网络不通。找到服

SocketTimeout -Definesthesockettimeout(SO_TIMEOUT)inmilliseconds,whichisthetimeoutforwaitingfordataor,putdifferently,amaximumperiodinactivitybetweentwoconsecutivedatapackets).ConnectTimeout -Determinesthetimeoutinmilliseco

std::stringmillisecond_to_str(conststd::int64_t&milliseconds){std::chrono::millisecondsms(milliseconds);std::chrono::time_point<std::chrono::high_resolution_clock,std::chrono::milliseconds>t1(ms);std::time_tt=std::chrono

boost::this_thread::sleep_for()会死锁（金庆的专栏）发现睡眠1ms很容易死锁。boost::this_thread::sleep_for(boost::chrono::milliseconds(1)).Boost1.54.0以下代码很可能重现死锁：#include"stdafx.h"#include<iostream>#include<boost/thread.

使用mybatis逆向工程时，连接数据库出现如下错误：CommunicationslinkfailureThelastpacketsentsuccessfullytotheserverwas0millisecondsago.Thedriverhas

基于redis的分布式锁,性能和稳定性都非常好.但是redis中setnx+expire是非原子操作,除了用LUA脚本保证实现原子操作,其实可以直接使用redis自带的set方法直接实现.setn

异常值探测配置示例常用的错误标识consecutiveLocalOriginFailuresconsecutiveGatewayErrors只包括502、503和504错误0值表示禁用consecutive5xxErrors

virtualservice-demoapp.yamlapiVersion:networking.istio.io/v1beta1kind:VirtualServicemetadata:name:demoappspec:hosts:-demoapphttp:-name:

故障注入故障注入有两种典型的场景delay：注入“延迟”abort：注入“中断”virtualservice-demoapp.yamlapiVersion:networking.istio.io/v1beta1kind:Virtu

架构图virtualservice-demoapp.yamlapiVersion:networking.istio.io/v1beta1kind:VirtualServicemetadata:name:demoappspec:hosts:-demoapphttp:

proxy-gateway.yamlapiVersion:networking.istio.io/v1beta1kind:Gatewaymetadata:name:proxy-gatewaynamespace:istio-systemspec:selector:app:i

环境说明frontend(proxy)：前端应用，会请求后端的demoappservice:proxydemoapp：后端应用同时部署两个版本 部署demoappv1.0deploy-demoapp-v10.yamla

/***毫秒转换为时间字符串*@parammilliseconds*@return*/publicstaticStringtimeStampToDhms(longmilliseconds){longday=TimeUnit.MILLISECONDS.toDa