题目链接:http://www.patest.cn/contests/pat-a-practise/1040 题目: 1040. Longest Symmetric String (25) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue Given a string, you are supposed to output the length of the longest symmetric sub-stri…
笔者在项目中遇到mysql 出现:1040 too many connections 异常,意思是超过数据库最大连接数,打不开表结构信息.笔者排除问题建议:1.查看程序代码是否存在BUG:2.检查代码是否关闭数据库连接:3.sql语句是否存在较复杂的查询,没有做优化 解决方法:1.代码层次的优化,因人而异,自我排查:2.mysql配置文件的修改,在此注重描述一下具体步骤,用mysql可视化工具Navicat(俗称小绿叶)或sqlyog(俗称小海豚),执行如下sql语句:1. show proce…
1.出现问题: openstack运行过程中出现如下问题: OperationalError: (pymysql.err.OperationalError) (1040, u'Too many connections') DBConnectionError: (pymysql.err.OperationalError) (2003, "Can't connect to MySQL server on 'controller' ([Errno 111] ECONNREFUSED)") […
1040 Longest Symmetric String (25)(25 分) Given a string, you are supposed to output the length of the longest symmetric sub-string. For example, given "Is PAT&TAP symmetric?", the longest symmetric sub-string is "s PAT&TAP s",…
Description Most of the time when rounding a given number, it is customary to round to some multiple of a power of 10. However, there is no reason why we cannot use another multiple to do our rounding to. For example, you could round to the nearest m…