在连接字符串中 添加设置节点 ConnectionLifeTime(计量单位为 秒).超过设定的连接会话 会被杀死! Connection Lifetime, ConnectionLifeTime 0 When a connection is returned to the pool, its creation time is compared with the current time, and the connection is destroyed if that time span (i
1. 增加 MySQL 的 wait_timeout 属性的值. 修改 /etc/mysql/my.cnf文件,在 [mysqld] 节中设置: # Set a connection to wait 8hours in idle status. wait_timeout =86400 将这2个参数设置为24小时(60*60*24=604800)即可. set interactive_timeout=604800; set wait_timeout=604800; 2. 减少连接池内连接的生
l 设置cookie,浏览器都有禁用或者清除cookie的功能 l 设置session,关闭浏览器就没了 所以,我们只能尽量防止重复投票现象 session_start(); //获取ip地址 if(!empty($_SERVER["HTTP_CLIENT_IP"])){ $cip = $_SERVER["HTTP_CLIENT_IP"]; } if(($_COOKIE['VoteIP']==$cip) or ($_SESSION['VoteIP']==$cip
Timeseries时间轴,设置x轴固定长度24小时 xAxis.setFixedAutoRange(3600000 * 2D), 再画出当天24点这一点 Date day = new Date(); day.setHours(23); day.setMinutes(59); Minute m = new Minute(day); timeseries.addOrUpdate(m, null); 每天24点日期切换的时候重画一次这一时间点