FreeBSD
在清华BBS上看到有些朋友在 FreeBSD 4.0 Release上编译MySQL时通不过，停留在编译sql/sql_yacc.cc文件处，很长 时间都通不过，有网友说编译了三个多小时都通不过，我真的很佩服他的耐心了。我也 遇到了同样的问题，还有过错误的判断。通过与清华BBS的网友交流，我相信找到了问题 所在。
有网友说用ports安装就没有什么问题，但并没有进一步说明 到底是因为什么。看了一下ports中对mysql-server的说明，原来用ports编译mysql需要 一个包：libtool-1.3.3。
请看FreeBSD对libtool这个包的描述
This is GNU Libtool, a generic library support script. Libtool hides the complexity of using shared libraries behind a consistent, portable interface.
To use libtool, add the new generic library building commands to your Makefile, Makefile.in, or Makefile.am.
这是GNU Libtool，通用的库支持脚本。Libtool 用一致的方便的接口隐藏了使用共享库的复杂性。（蹩脚的翻译）要使用libtool，将新的通用库 编译命令加入Makefile，Makefile.in，或Makefile。am中。
使用ports安装需要先安装libtool-1.3.3这个包，但是不用ports安装， 直接编译也需要么？实验证明是不需要的，在没有安装libtool包的情况下直接编译mysql也可以通过， 只是停留在编译sql_yacc.cc这个文件的时间非常长，一般人都会觉得编译出了问题而中断编译过程。 如果你耐心等待，并且有足够的内存和交换分区，应该是可以编译通过的。
如果在编译sql_yacc.cc的时候出现了下面的错误：
Internal Compiler error: program cc1plus got fatal signal 11或
Out of virtual memory或
virtual memory exhausted
该问题是gcc要求大量的内存编译带有嵌入函数(inline function)的sql_yacc.cc， 而系统内存和交换分区不足，那么可以使用./configure --with-low-memory重新配置，再进行编译。
如果你正在使用gcc，该选项使得将-fno-inline加到编译行，如果你正在使用 其他的编译器，则加入-O0。即使你有特别多的存储器和交换空间，也应该试一试--with-low-memory 选项。
我通过测试表明，使用--with-low-memory显著的降低了编译时间，而用ports安装时， ports中的patch将-O0加入了Makefile，不使用--with-low-memory也同样可以快速的编译完成。
其实，FreeBSD 4.0 Release的ISO安装盘中有mysql的二进制安装包， 不用编译，pkg_add就ok了，何必如此麻烦呢？
Explain the InnoDB Buffer Pool and its importance for performance.Apr 19, 2025 am 12:24 AMInnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.
MySQL vs. Other Programming Languages: A ComparisonApr 19, 2025 am 12:22 AMCompared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.
Learning MySQL: A Step-by-Step Guide for New UsersApr 19, 2025 am 12:19 AMMySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.
MySQL: Essential Skills for Beginners to MasterApr 18, 2025 am 12:24 AMMySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.
MySQL: Structured Data and Relational DatabasesApr 18, 2025 am 12:22 AMMySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.
MySQL: Key Features and Capabilities ExplainedApr 18, 2025 am 12:17 AMMySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.
The Purpose of SQL: Interacting with MySQL DatabasesApr 18, 2025 am 12:12 AMSQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.
MySQL for Beginners: Getting Started with Database ManagementApr 18, 2025 am 12:10 AMThe basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
Dreamweaver Mac version
Visual web development tools
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
