mybatis-系统中一条查询sql导致整个系统无发法跟数据库交互，只能访问静态页面，该怎么办呢？
mybatismysqltomcatjava
情况是这样的: 在系统的查询数据页面, 有的查询语句比较复杂, 导致查询一直卡住, 即时在数据库中直接查询也需要10秒上, 这样, 在代码中的查询就是一条请求迟迟没有回应. 这样还导致了系统无法做任何跟数据库的交互的操作,即使使其他用户不同ip访问也不行. 但是直接访问数据库还是可以的, 重启系统后, 也还是可以访问数据库的.
求教, 为什么一条sql会导致整个系统挂掉呢? 如果是影响到数据库,那为什么用数据库工具直接连还是可以连上?
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1371
52
How do you alter a table in MySQL using the ALTER TABLE statement?
Mar 19, 2025 pm 03:51 PM
The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.
How do I configure SSL/TLS encryption for MySQL connections?
Mar 18, 2025 pm 12:01 PM
Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]
How do you handle large datasets in MySQL?
Mar 21, 2025 pm 12:15 PM
Article discusses strategies for handling large datasets in MySQL, including partitioning, sharding, indexing, and query optimization.
What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)?
Mar 21, 2025 pm 06:28 PM
Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]
How do you drop a table in MySQL using the DROP TABLE statement?
Mar 19, 2025 pm 03:52 PM
The article discusses dropping tables in MySQL using the DROP TABLE statement, emphasizing precautions and risks. It highlights that the action is irreversible without backups, detailing recovery methods and potential production environment hazards.
How do you represent relationships using foreign keys?
Mar 19, 2025 pm 03:48 PM
Article discusses using foreign keys to represent relationships in databases, focusing on best practices, data integrity, and common pitfalls to avoid.
How do you create indexes on JSON columns?
Mar 21, 2025 pm 12:13 PM
The article discusses creating indexes on JSON columns in various databases like PostgreSQL, MySQL, and MongoDB to enhance query performance. It explains the syntax and benefits of indexing specific JSON paths, and lists supported database systems.
How do I secure MySQL against common vulnerabilities (SQL injection, brute-force attacks)?
Mar 18, 2025 pm 12:00 PM
Article discusses securing MySQL against SQL injection and brute-force attacks using prepared statements, input validation, and strong password policies.(159 characters)
