让我们继续上一次遗留的问题：setTimeout(function(){console.log('1')});newPromise(function(resolve){console.log('2');resolve();}).then(function(){console.log('3')});conso

publicvoidcreateDepartment(Departmentdepartment)throwsBusException{if(log.isDebugEnabled()){log.debug("EnterDepartment:{}",department);}

查看日志存放目录\find/nameaccess.log/var/log/nginx/access.logcd/var/log/nginxIP相关统计统计IP访问量（独立ip访问数量）awk'{print$1}'access.log|sortn|uniq|wcl

mysql增加慢日志vim my.conf\超过1s的查询会记录到日志文件中long\_query\_time1logslowqueries/data/var/mysql\_slow.log\记录没用索引的查询logqueriesnotusinginde

（1）redolog的大小可以影响DBWR和checkpoint；（2）argerredologfilesprovidebetterperformance.Undersizedlogfilesincreasecheckpointactivityandreduceperformance.大的logfile可以提

运行用户usernobody;启动进程,通常设置成和cpu的数量相等worker_processes1;全局错误日志及PID文件error_loglogs/error.log;error_loglogs/error.lognotice;err

1\.转字符串constinput123;console.log(input'');//'123'console.log(String(input));//'123'console.log(input.toString());//'123'

usingCoreImportDataApp.Common;usingMicrosoft.Extensions.Configuration;usingMicrosoft.Extensions.DependencyInjection;usingSystem;usingCoreImportDataApp.

本文试图解释undolog，redolog，binlog的作用，以及Innodb的MVCC机制undologundolog记录的是sql语句执行更新前的数据，这里的更新是泛指，除了select其它都算更新。在读已提交和可重复读的隔离级别下，会记录事务中某条