本文通过使用python脚本来启动oracle数据库,实现oracle数据库的开机启动(主要启动监听和数据库,不包含dbconsole): STEP1:关闭数据库,关闭监听 /prepre name=code class=sql[oracle@REDHAT6 ~]$ lsnrctl stopSQL shutdown immediate STEP2:查看是否有
本文通过使用python脚本来启动oracle数据库,实现oracle数据库的开机启动(主要启动监听和数据库,不包含dbconsole):
STEP1:关闭数据库,关闭监听
[oracle@REDHAT6 ~]$ lsnrctl stop SQL> shutdown immediate

STEP2:查看是否有python相关的包是否已经安装(若没有安装,就需要安装相关的包)
[root@REDHAT6 ~]# which python /usr/bin/python
STEP3:编写启动相关服务的 python 脚本
-- 先新建两个文件,一个是python脚本,一个是记录日志 [oracle@REDHAT6 ~]$ touch oracle.py [oracle@REDHAT6 ~]$ touch oracle.log [oracle@REDHAT6 ~]$ chmod -R 755 oracle.py
python脚本
import commands; import sys; import time; dtime=time.strftime('%Y-%m-%d %H:%I:%M:%S',time.localtime(time.time())); file_append=open('/home/oracle/oracle.log','a+') print>>file_append,dtime,'\n' print>>file_append,'============START LISTENER================\n' (status,output)=commands.getstatusoutput("su - oracle -c '/u01/app/oracle/bin/lsnrctl start' ") print>>file_append,output+'\n' if(status==0): print>>file_append,'============OK: LISTENER START OK=============\n' else: print>>file_append,'============ERROR: LISTENER START ERROR=============\n' print>>file_append,'============START DATABASE================\n' (status,output)=commands.getstatusoutput("su - oracle -c '/u01/app/oracle/bin/dbstart' ") print>>file_append,output,'\n' if(status==0): print>>file_append,'============OK: DATABASE START OK=============\n' else: print>>file_append,'============ERROR: DATABASE START ERROR=======\n' print>>file_append,'\n','\n' file_append.close()
脚本先启动lsnrctl, 再启动 dbstart, 在dbstart启动时,会自动启动lsnrctl,由于本人在环境变量中没有配置,所以在启动dbstart时,监听无法启动,所以就在python中先启动了监听
STEP4:将脚本执行命令添加到开机启动中
[oracle@REDHAT6 ~]$ vi /etc/rc.d/rc.local在该文件中增加一行:su - root -c "python /home/oracle/oracle.py" 有的人说是将 su - root 要改成 oracle用户,这里没有必要改,因为我在python脚本中已经指定了oracle用户

下次启动机器,就会发现监听程序和数据库程序已经启动
最后,我们看看日志文件
[oracle@REDHAT6 ~]$ tail -200 /home/oracle/oracle.log

下面是启动数据库的日志,里面会报监听错误,但是监听我们先已经启动了,所以可以不必理会。也可以通过配置环境变量来启动
参考网址:
http://blog.csdn.net/my2010sam/article/details/18315785
http://biancheng.dnbcw.info/python/242105.html

InnoDBBufferPool 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.

Compared 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.

MySQL 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 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 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 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.

SQL 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.

The 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

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

Dreamweaver CS6
Visual web development tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.