#### 场景描述
接收到P99超时告警,定位到某接口导致,接口是由新同事实现的,逻辑较简单,是一个MySQL的INSERT OR UPDATE逻辑,
一个请求过来,判断某个非主键字段是否存在,不存在则INSERT插入,存在则按该字段UPDATE更新其他字段。
超时告警在触发与恢复之间反复触发,平均耗时6秒,接口最近无改动,已上线一段时间运行正常。
表结构:
CREATE TABLE `CAPTION` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键',
`created_at` int(1
####安装mysql
下载
sudo rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
sudo yum install mysql-server
service mysql stop
mysqld_safe --skip-grant-tables &
mysql -u root
> use mysql;
> update user set password=PASSWORD("NEW-ROOT-PASSWORD
登录远程mysql:`$ mysql -uroot -h192.168.137.108 -p`
报错:
ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.137.108' (111)
解决办法:注释掉/etc/mysql/my.cnf的bind-address = 127.0.0.1
报错:
ERROR 1130 (HY000): Host '192.168.137.108' is not allowed to connect to this MySQL ser
......导出数据:
ashin@linux:~$ sqlite3 ~/geek/iamnotdbfile .dump > geek.sql
删除前两行和最后一行:
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
...
COMMIT;
ashin@linux:~$ sed -i '1,2d; $d' geek.sql
将sqlite的"换成mysql的`:
ashin@linux:~$ sed 's/"/`/g' geek.sql > geek1.sql
加上mys
安装MySQL
sudo apt-get install mysql-server
sudo apt-get install mysql-workbench
安装MySQLdb:
pip install MySQL-python
报错找不到config文件:
sudo apt-get install libmysqld-dev
Linux mysql5.5.18设置编码
应该在my.cnf的[mysqld]下添加 character-set-server = utf8
charact