Summary of oracle installation problems

Oracle is the industry's leading database management system and is widely used in enterprise-level application systems. However, installing Oracle is also a troublesome thing. Especially for beginners, they may encounter various problems, and how to solve these problems has become a difficulty before us. In this article, we will introduce some possible Oracle installation problems and how to solve them.

1. Preparation before Oracle installation

Before installing Oracle, you need to make some preparations for the system. Some necessary software packages need to be installed, memory size needs to be checked, users need to be added, etc. If these preparations are not done well, it is likely to cause various problems during the installation process.

2. Problems during Oracle installation

2.1 "System Class" error

When installing Oracle software, if "System Class" pops up Error, this is most likely due to temporary file limitations in the shell or an inconsistency in the CPU architecture. The workaround is to resolve this issue by adding the following three lines of environment variables:

ulimit -n 4096
ulimit -u 16384
ulimit -s 16384

2.2 "Ignoring required pre -requisite failures" error

When installing Oracle, the "Ignoring required pre-requisite failures" error will occur. This error is usually caused by the Oracle installer not being able to find some dependent libraries or files. The solution is to find the required dependencies from Oracle documentation or the Internet, download and install them.

2.3 “File not found” error

When installing Oracle, a “File not found” error may occur. This error is usually caused by the Oracle installer being unable to find the installation media or required files. The solution is to check whether the media or files are missing or damaged and re-download or copy to the correct directory.

2.4 "Insufficient disk space" error

When installing Oracle, an "Insufficient disk space" error may occur. This error is usually due to insufficient disk space. The solution is to clear disk space or increase disk space.

3. Problems after Oracle installation

3.1 The Oracle service cannot be started

After the Oracle installation is completed, the service may not be started. This problem is usually due to the failure of the Oracle service to start. The solution is to check whether the Oracle service is configured correctly, whether the data directory exists, and whether the Oracle user has access rights to system resources, etc.

3.2 Oracle connection failure

After the installation is completed, the connection to the Oracle database may fail. This problem is usually caused by the database listener not being started or configured incorrectly. The solution is to check whether the listener has been started on the Oracle host and check whether the listener.ora file has been correctly configured.

4. Summary

Installing Oracle is a very complex and time-consuming process. During the installation process, various possible problems need to be solved one by one. Some of the issues listed in this article are just the tip of the iceberg, and some require careful analysis and debugging. For those who are new to Oracle, they may encounter more problems. However, only by overcoming these problems can we gain a deeper understanding of the Oracle database and appreciate its important role in enterprise-level applications.

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