DUMP File Overview
In order to enhance the fault analysis capability, the IBM server has added the ability to save the current environment for device faults, it is to save the data and status information of the memory, CPU registers, IO, and other
One, Oracle trace fileThere are three types of Oracle trace files, a background alarm log file that records the activity of the background process during startup, shutdown, and operation of the database, such as tablespace creation, rollback segment
One, Oracle trace FileOracle trace files are grouped into three categories:
One is the background alarm log file that records the activity of the background process during startup, shutdown, and running of the database , such as table space
I,OracleTracking FileThere are three types of Oracle tracking files:
One is the background alarm log file, which recordsDatabaseActivities of background processes during startup, shutdown, and running, such as creating tablespaces, creating
Buffer header structure Diagram and introduction
Figure 1:
Buffer header: Each data block is read into the buffer cache, will first in the buffer cache to construct a buffer Header,buffer header and data block one by one corresponding. The main
Have you ever accidentally deleted a database table or damaged the disk where the database is stored? If you encounter this situation, I believe you will feel very frustrated, because the results of your hard work for a few weeks may be overwhelmed.
In oracle, the default index type is B-tree index. Bitmap indexes, reverse key indexes, hash indexes, and function-based indexes. This article mainly introduces the B-tree index through dump analysis. For the index scan type, the basic operations of
Information A
1, stop the database server, the database MDF files and LDF files copy backup a copy
2, start the database server, delete the suspect database
3, only with the backup of the database MDF file attached to the database,
first, the use of Pg_dump:Import and export of databases is one of the most commonly used features, each of which provides tools for this, such as Oracle's Exp/imp,informix Dbexp/dbimp,mysql mysqldump, and PostgreSQL provides a corresponding tool
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