原题链接在这里:https://leetcode.com/problems/the-earliest-moment-when-everyone-become-friends/ 题目: In a social group, there are N people, with unique integer ids from 0 to N-1. We have a list of logs, where each logs[i] = [timestamp, id_A, id_B] contains a…
http://www.mysqlperformanceblog.com/2014/01/28/10-mysql-settings-to-tune-after-installation/ 翻译加深理解. 先是几个point Change one setting at a time! This is the only way to estimate if a change is beneficial. 一次只调一个参数,确保改动是有益的. Most settings can be changed a…
1.如何查看SVN上当前代码库的最新版本号是多少? 打开右键菜单中的 show log,然后看到一系列版本更新历史,最上面的那一行,即是最新版本号,所谓的 head revision. 2.如何查看本地SVN管理的代码库的当前版本号是多少? 打开右键菜单中的 show log,然后看到一系列版本更新历史,显示为粗体的那一行即你本地当前的版本. 3.如何将本地代码库的版本回退到某一个旧版本? 打开右键菜单中的 update to revision ,在弹出的对话框中进行版本号指定即可,如果选择 h…
最近最是在MySQL5.7上的的gtid主从复制问题总是遇上下面问题: Last_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction '23be4eb1-d990-11e7-921a-0242ac110002:13476' at master log bin.0000…
问题: 启动tomcat时,catalina.out日志打印到如下内容就停止不动了,也不报错 SEVERE: FarmWarDeployer can only work as host cluster subelement! Dec 02, 2016 4:27:39 PM org.apache.catalina.startup.HostConfig deployWAR INFO: Deploying web application archive /app/apache-tomcat-7.0.7…