Too many connections：解决mysql连接数过多的问题

1,ERROR 1040 (HY000): Too many connections
解决方法：
1）gdb -p 1985 -ex "set max_connections=10240" -batch
show variables like '%max_connections%';
2）mysql命令行
SELECT concat('KILL ',id,';') FROM information_schema.processlist WHERE user='root';
3) 写脚本将Locked的记录存入到sql文件
#!/bin/bash
user=root
passwd=dota.123
/data/mysqlc/bin/mysql -u$user -p$passwd -e"show processlist"|grep -i "Locked">>/data/backup/locked_log.txt
for line in `cat locked_log.txt | awk '{print$1}'`
do
echo "kill $line;">>/data/backup/kill_thread_id.sql
done
4）mysql命令行 source /data/backup/kill_thread_id.sql