oracle pl sql performance tuning

parameter that affects Oracle performance, I will explain in detail in this regard 3. Network conditions: Net*sql is responsible for the data on the network, a large number of SQL will slow down the network speed. For example, 10M network card and 100 of the network card has a very obvious impact on the net*

Microsoft, one is not perfect function also dare to take Out (2000) The second functional architecture of the outstanding design makes the function has a strong continuity and Scalability (2005 2000 of the function to retain and improve). The optimization tool is simple to use 1: Use SQL Server Porfiler (Event Viewer) to record all the steps of the operation database in the business system and save it as a working file. 2: Open sql2005 's database

on an incorrect basis to draw incorrect conclusions. Here are some caveats. The Solaris operating environment is good for the performance optimization of workloads in most cases. The newer the release, the less performance optimizations that need to be done manually. The root cause of performance problems is often found to be caused by an attempt to optimize

PROCEDURE fenye (TABLENAME in VARCHAR2,PAGESIZE in number,--Display records per pagePagenow in number,--Number of pagesMyrows out number,--Total recordsMypagecount out number,--Total pagesP_cursor out Testpackage. Test_cursor) is--the recordset returned --Definition section--Define the SQL statement stringV_sql VARCHAR2 (1000);--Definition of two integersV_begin Number: = (PAGENOW-1) * PAGESIZE + 1;V_end Number: = Page

,--Display records per pagePagenow in number,--Number of pagesMyrows out number,--Total recordsMypagecount out number,--Total pagesP_cursor out Testpackage. Test_cursor) is--the recordset returned --Definition section--Define the SQL statement stringV_sql VARCHAR2 (1000);--Definition of two integersV_begin Number: = (PAGENOW-1) * PAGESIZE + 1;V_end Number: = Pagenow * PAGESIZE;BEGIN--Executive SectionV_sql: = ' select *

,--Display records per pagePagenow in number,--Number of pagesMyrows out number,--Total recordsMypagecount out number,--Total pagesP_cursor out Testpackage. Test_cursor) is--the recordset returned --Definition section--Define the SQL statement stringV_sql VARCHAR2 (1000);--Definition of two integersV_begin Number: = (PAGENOW-1) * PAGESIZE + 1;V_end Number: = Pagenow * PAGESIZE;BEGIN--Executive SectionV_sql: = ' select *

$librarycache; reloads/pins>1% There are two possibilities, one is the library cache space is insufficient, one is the object referenced in SQL illegal. 3. The shared pool reserved size is typically 10% of the shared pool size and cannot exceed 50%. The request misses=0 in v$shared_pool_reserved is either not continuously growing, or the free_memory is greater than 50% of the shared pool reserved size, indicating that the shared pool reserved Size i

Label:To create a function: Create or Replace function My_fun (in_no in number) return VARCHAR2 isOut_name VARCHAR2 (64);BeginSelect Ename to Out_name from EMP where emp.empno=in_no;return out_name;End My_fun; Java Program Demo: Import java.sql.CallableStatement;Import java.sql.Connection;Import Java.sql.DriverManager;Import java.sql.SQLException;Import Java.sql.Types; public class Javacallmath {public static void Main (string[] args) {String driver= "Oracle.jdbc.driver.OracleDriver";String ur

Solve PL/SQL Dev connection to Oracle a blank prompt box appears, ploracle The first time Oracle was installed, it was installed in a virtual machine. When PL/SQL Dev was used to connect to a remote database, a blank prompt box po

Connecting PL/SQL to oracle database and plsqloracle DatabaseConnecting PL/SQL to oracle database 1. Introduction Use pl/SQL to connect to a

Oracle BASICS (5) Advanced pl/SQL (paging process)Compile the paging process to implement the paging process through pl/SQL, and then step by step from simple to difficult. The purpose is to familiarize yourself with the various stored procedures, packages, and cursors of

1. Knowledge Points: Can be read against the following record screenPL/SQL Program structure declare description section (variable description, cursor declaration, exception Description)begin statement sequence (DML statement) ... exception exception handling statement end;/------------------ --------------------------------------------------the first PL/SQL prog

Tags: Connection query sequence developer save set bound goto RowType View\ t 1th Introduction to PL/SQL development1th Oracle 11g Database System1.1 Introduction of relational database system1.1.1 What is a relational data model1.1.2 Database System Paradigm1.1.3-relational database management system1.1.4 using SQL st

PL/SQL Developer is an integrated development environment that specializes in developing applications for Oracle databases. At the same time, PL/SQL is a procedural languageCalled the process SQL language (procedural language/

1. Import the trace file into the tableSELECT IDENTITY (BIGINT11 as RowNumber,* into TableNamefrom fn_trace_gettable ('trace.trc'default)2. Querying for statements with large CPU overheadSELECT Top -Total_worker_time/Execution_count asAvg_cpu_cost, Plan_handle, Execution_count, (SELECT SUBSTRING(text, Statement_start_offset/2 + 1, ( Case whenStatement_end_offset= -1 Then LEN(CONVERT(nvarchar(Max),text))* 2 ELSEStatement_end_offsetEND -Statement_start_offset)/2) fro

Products: AIX, Oracle Platform: pseries, AIX Version: All Conflicts in memory access now when the process requests more memory than the total physical memory of the system, in order to handle this situation, the system swaps the program and the data between the memory and the hard disk. Control Memory Exchange operation (paging) A large number of memory exchange operations can greatly affect the performance