memory structure
ORADEBUG Study Notes
Starting from ORACLE7, ORADEBUG DBA tools began to be used. It can be tracing any session / dump SGA and other memory structure / wakeup oracle process / suspend and resume processing .... I. Summary of the first to see help SQL> oradebug help HEL ...
ORACLE memory structure analysis
1, ORACLE 3 large memory structure (1) the system global area (System Global Area, SGA) (2) process global area (Process Global Area, PGA) (3) the user global area (User Global Area, UGA) Second, SGA 1, SGA refers to the system global area (System Gl ...
Oracle instance and Oracle database Xiangjie
Oracle instance and Oracle database Xiangjie 1, ORACLE instance 1, ORACLE instance - including the memory structure and background processes System Global Area (SGA) and the Background Process as a database instance. 2, ORACLE database - a collection ...
Excerpt on the library cache lock event analysis
Excerpt 1, LIBRARY CACHE PIN usually occurs at compile or re-compile PL / SQL, VIEW, TYPES, etc. when the object. Compilers are usually dominant, such as installing applications, upgrading, installing patches, etc. In addition, "ALTER", &qu ...
Non-idle wait events (3)
Non-idle wait events (1) http://blog.chinaunix.net/u3/107027/showart_2146592.html Non-idle wait events (2) http://blog.chinaunix.net/u3/107027/showart_2146601.html 12, library cache pin When the session is trying to peg the library cache in an object ...
How to read statspack report
Generate a statspack report is relatively simple, but how to read statspack report is not so easy, the need for Oracle architecture, memory structure, and wait for events, and applications have a full understanding, coupled with constant practice, in ...
Oracle system
Oracle system Oracle's system is very large, we should study it, we must first understand the Oracle framework. Here, a brief talk about the structure of Oracle, so that beginners have a general understanding of Oracle. 1, the physical structure ...
ORACLE little knowledge architecture
As a regular dealings with the database software developers, has not been resolved to seriously sum up the database. Although most came into contact with open source, mysql, then install the linux once oracle, and that was the end of 2005 when the or ...
Essence Shared pool in-depth analysis and performance tuning (1)
Transfer from IT168 Abstract: This paper describes in detail the concept of oracle in shared pool as well as contained in the memory structure. Then in-depth description of the oracle management mechanism for the shared pool. Finally a comprehensive ...
Understand what is the data dictionary
Each Oracle database consists of one known as "metadata" set, or a database that contains the data structure used to describe the data. Contains these metadata tables and views known as the Oracle data dictionary. Data dictionary has the pr ...
oracle memory structure
Block, district, paragraph Stored in multi-line block Areas included in the block to connect Paragraph contains a number of areas, not straight Block: PCTUSED PCTFREE is updated to retain sufficient space to avoid the "row chaining" freelis ...
Oracle memory structure of-PGA
I. Overview SGA, PGA, UGA is Oracle's memory management. SGA (System Global Area), that is, the overall situation of the district system, Oracle the most important area of memory. PGA (Process Global Area), that is, the overall district program, ...
Oracle memory structure-SGA
First, an overview of the "Oracle memory structure of-PGA Chapter" mentioned in the article, PGA is a dedicated server process private memory area, while the SGA is the shared memory area. SGA by a number of parts: 1, the fixed SGA (Fixed S ...
Oracle parameter files
The following are documents from the Oracle. Startup routine in the Oracle server initialization parameter files when read. There are two types of initialization parameter files: • Static Parameter File PFILE, generally known as initSID.ora. • perman ...
ORACLE instance of the process of the structure and memory structure
ORACLE instance of the process of the structure and memory structure 1. ORACLE instance of the process of the structure and memory structure 1) the process of the structure of the process is a mechanism for the operating system, which operated a seri ...
3.5.2 ORACLE database system
3.5.2 ORACLE database system 1. The spatial structure of system memory ORACLE system memory structure is divided into two parts: the system global area, process global area. System global area can be further divided into: the shared pool (shared pool ...
How to learn Oracle?
Source: Net sea cockle-pickers Some Oracle beginners often asked this question, here regarded as a unified response. 1, if there is some basis for a database, knowing how SQL is going on, even though he could not write to a simple SQL, but you can lo ...
Oracle 1Z031 Study Notes
Oracle 1Z031 study has dragged on for too long, in addition to their busy, one of the key issue is not enough to learn a coherent system. Now makes it mandatory for 12 days to write a chapter a day of study notes. rn Today, Oracle achitechtural compo ...
Oracle process memory structure - how to look at Oracle process memory consumption
Oracle process memory structure - how to look at Oracle process memory consumption rn Has often been asked how to determine the process under Unix consume memory resources, and why the Top tools for the display of very high. Some people say that the ...
Comparison of impact performance common to wait for the event
db file scattered read The event usually associated with full table scan on. Because the full table scan is being conducted into the conduct of the memory, the Under normal circumstances it can not be placed in a continuous buffer, so the spread in t ...
Oracle's entry experience - "strongly recommended
rn 1, positioning oracle development and management. (Management is more suited to me, He He) Second, learning reading, thinking, writing notes, doing experiments, and then think, write notes. Learning process is to make an issue from the vague to the cle
Oracle Memory and adjustment
rn For the SGA, you can use sqlplus query: rn SQL> select * from v $ sga; rn Fixed Size rn Variable Size rn Includes shared_pool_size, java_pool_size, large_pool_size set up and manage memory and other memory buffers such as the memory structure, ...