多半是磁盘满了，检查/usr/local/nginx/logs文件夹

du -h –max-depth=1 /usr/local/nginx/logs
cat /dev/null > /usr/local/nginx/logs/access.log
cat /dev/null > /usr/local/nginx/logs/error.log

可以在计划任务里面加入

3 3 * * * cat /dev/null > /usr/local/nginx/logs/access.log
5 3 * * * cat /dev/null > /usr/local/nginx/logs/error.log