SIZING THE SHARED POOL IN ORACLE 10G

SQL> SELECT SUMPINS "EXECUTIONS", 2 SUMRELOADS "CACHE MISSES", 3 SUMRELOADS/SUMPINS 4 FROM V$LIBRARYCACHE; EXECUTES PROC1 —> 1ST PIN, 1 LOAD EXECUTES PROC1 —> 2ND PIN, NO RELOAD EXECUTES[r]

For both the Access and the XML data, we connected to physical files. Are we going to do the same with the Oracle? Well, no. Oracle is much like SQL Server in that both run as Win- dows services, which are different than file-based databases, such as Access.[r]

tion Server 10 g (referenced here together as Application Server) replaced a previous
Oracle Application Server (OAS) and Oracle Web Application Server. Oracle’s Application Server can be scaled across multiple middle-tier servers.
This product includes a web l[r]

joined in a query, and many of their columns have the same name, requiring them to be unambiguously named in the SELECT clause. Aliases are also commonly used in correlated subqueries, and when a table is being joined to itself.
condition may be any valid expre[r]

To help you understand a bit better, consider an example that consists of a Web services architecture that federates or makes many calls as part of a single business transaction. Each of these services may be on separate servers, using separate databases, providing separate information for separa[r]

SOUNDEX
This function converts a string to a code value. Words with similar sounds will have a similar code value, so you can use SOUNDEX to compare words that are spelled slightly differently but sound basically the same. The general format for this function is: SOUNDEX(string)

Project 1-1 Reviewing the Oracle Database 10g Architecture
There are many types of files that come together to support the Oracle Database 10 g . In this section, we have discussed control files, online redo logs, the system t[r]

Standalone Agent and chain-installed Agent installations, once completed, are identical. Each plays the role of a central Agent that GC needs to manage a particular target host.
In this chapter, I annotate all preinstallation tasks with OMR, OMS, and/or OMA (for any Agent installati[r]

CLEAR COLUMNS
A problem here may be that CLEAR COLUMNS clears all column formatting, but a universal CLEAR is likely appropriate as the AMOUNT column may well appear in some other table and one might not want the same formatting for both. If the other AMOUNT col- umn co[r]

Redo Logs
Redo logs are necessary to ensure database integrity and should be duplexed in Oracle. Oracle mirroring helps even if your redo logs are mirrored by your storage subsystem since Oracle will use the alternate redo log if one should become corrupt. You wi[r]

DISK_ASYNCH_IO and the DB_WRITER_PROCESSES parameters.
SQL Reuse Opportunities This analyzes the shared pool to identify SQL statements inefficiently using the shared pool.
The Oracle server maintains only one copy of a distinct SQL[r]

Page xv
Acknowledgments
Ian Abramson: I would like to thank my wife, Susan (who is the best decorator in the world), and my children,
Baila and Jillian. We are strongest as one, we all draw strength from each other. Thanks also to my coauthors: you have helped to make th[r]

The library cache is where Oracle stores object definitions, SQL statements, and PL/SQL objects for use in areas called namespaces . For monitoring purposes, you’re interested in the efficiency of the use of the library cache.
Library cache misses[r]

Tài khoản người dùng mà không được sử dụng phải được khóa để ngăn chặn nỗ lực để thỏa hiệp xác thực.
1.6.2.3. Giám sát cho Hành vi Đáng ngờ.
Thậm chí có thẩm quyền và người sử dụng chứng thực đôi khi có thể thỏa hiệp hệ thống. Xác định cơ sở dữ liệu hoạt động không bình thường (chẳng hạn như[r]

If data access characteristics are causing the low cache hit ratio, the DBA might be able to improve the ratio by defining multiple pools or caching tables.
Technical Note
You need to consider the impact of operating system caching. For example, the Oracle<[r]

In Oracle Database 11g, you can configure scarce resources even better in a large-user environment by using the new database resident connection pooling (DRCP) feature. DRCP
employs a pool of dedicated servers for servicing larger numbers of connections[r]

OBJECTIVES AFTER COMPLETING THIS LESSON, YOU SHOULD BE ABLE TO DO THE FOLLOWING: • IDENTIFY ISSUES ASSOCIATED WITH MANAGING USERS IN AN ORACLE SHARED SERVER ENVIRONMENT • CONFIGURE THE O[r]

130 Chapter 9
even 1,000 bytes. This is because there is no guarantee on how many of the free bytes are contiguous. Even if a 1,000-byte free block exists, there is no guarantee on how long it might take to fi nd the block. The allocation service may well have to sea[r]

If the timer-tick rate is 10 ms, application timers may expire up to 10 ms early. This inaccuracy is more signifi cant for 10 ms timers than for one-second timers. Of course, increasing the timer interrupt frequency decreases this margin of[r]