Paddle 训练使用机器越多，cost下降越慢

源自github用户paddle-bot[bot]: Since you haven\'t replied for more than a year, we have closed this issue/pr. If the problem is not solved or there is a follow-up one, please reopen it at any time and we will continue to follow up. 由于您超过一年未回复，我们将关闭这个issue/pr。 若问题未解决或有后续问题，请随时重新打开，我们会继续跟进。

源自github用户zhaoyuchen2018: 麻烦提供下完整的代码和数据，日志里面没有太多信息

源自github用户AWSWXY: 相同的代码和数据 使用40个节点cost缓慢下降 使用80个节点 cost不下降 http://10.87.108.38:8900/fileview.html?path=/home/disk1/normandy/maybach/app-user-20190606023619-1949/ 40个节点日志 http://10.197.72.150:8900/fileview.html?path=/home/disk1/normandy/maybach/app-user-20190606023517-8974/ 80个节点日志