连接数据库mysql 的相关内容

阿里云文档 2025-12-23

IMCI全文索引使用说明

本文档介绍如何在PolarDB MySQL版的列存索引（IMCI）上构建和使用全文索引，通过列级 COMMENT 配置倒排索引，即可利用MATCH...AGAINST语法或自动优化的LIKE查询实现毫秒级模糊检索。该功能基于 IMCI 的倒排索引与词项匹配机制实现，详细原理请参见列存索引全文检索能力剖析。

阿里云文档 2025-12-16

【新功能/规格】RDS MySQL蓝绿部署支持MySQL 5.6升级至MySQL 5.7/8.0

自北京时间2025年10月15日起，RDS MySQL蓝绿部署功能支持MySQL 5.6升级至MySQL 5.7及8.0。

阿里云文档 2025-11-18

半同步复制超时优化

在MySQL半同步复制环境中提交大事务时，常因Binlog传输所需时间过长而导致半同步超时。这会使半同步复制降级为异步复制，引致数据可靠性下降，同时阻塞后续事务，造成业务性能抖动。为解决此问题，RDS MySQL推出了Binlog实时传输功能。该功能可以在大事务执行过程中就将其Binlog流式传输至备库，从而在事务提交时将同步耗时降至毫秒级，保障数据高可靠与业务性能的稳定。

阿里云文档 2025-10-20

PolarDB MySQL版边缘云集群的SQL洞察功能默认开启，支持多维度搜索与全量SQL明细采集，助力性能诊断与风险分析。

SQL洞察功能能够对SQL进行健康状况的诊断、性能问题的排查以及业务流量的分析，从而提升故障诊断、数据库优化与风险发现的效率。

阿里云文档 2025-10-20

PolarDB MySQL边缘云集群支持慢SQL查询。

PolarDB MySQL版边缘云集群支持慢SQL查询，默认将执行时间超过1秒的SQL语句定义为慢SQL，默认保存14天。用户可以使用慢SQL功能分析DB性能问题。

文章 2025-02-15 来自：开发者社区

如何排查和解决PHP连接数据库MYSQL失败写锁的问题

PHP连接MySQL数据库失败及写锁问题的排查和解决在使用PHP连接MySQL数据库时，可能会遇到连接失败和写锁问题。这类问题可能会影响应用的正常运行，本文将详细介绍排查和解决这些问题的方法。一、PHP连接MySQL数据库失败 1. 排查连接失败的常见原因数据库配置错误：检查数据库主机、用户名、密码和数据库名是否正确。 $servername &...

问答 2024-06-10 来自：开发者社区

连接RDS数据库报错Can't connect to local MySQL server t...

连接RDS数据库报错Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'

文章 2024-04-07 来自：开发者社区

用navicat连接数据库报错：1130-host ... is not allowed to connect to this MySql server如何处理

这个问题是因为在数据库服务器中的mysql数据库中的user的表中没有权限(也可以说没有用户)，下面将记录我遇到问题的过程及解决的方法。遇到这个问题首先到mysql所在的服务器上用连接进行处理 ...

文章 2023-10-20 来自：开发者社区

数据库迁移工具Kettle连接Mysql数据库报错：Driver class ‘org.gjt.mm.mysql.Dr...解决

报错信息：错误连接数据库 [test] : org.pentaho.di.core.exception.KettleDatabaseException: Error occurred while trying to connect to the database Driver class 'org.gjt.mm.mysql.Driver' could not be found, make sur....

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数据库审计

满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。

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