1. Oracle @ DESY DV-Seminar 26.01.2009
Harald Falkenberg / Christine Apfel

2. History ongoing replacement of IBM/MVS main frame by Unix systems
replacement needed for DB2 and AS
migration of HERA documentation (magnet DB, vakuum DB),
H1, M, phonebook applications
reqirements on new database system:
support multiple OS: IBM/MVS, Mac, Windows 3.x, VMS, Unix: AIX, HP/UX,
IRIX, SunOs, Solaris, Ultrix
support of embedded C/C++, Fortran, Cobol libraries
support of fill-in and reproting tools
support of planed new applications:
CAD/Cim database, account registry, date book,
data analyses of HERA experiments (H1, Zeus)

3. Oracle start in 1993 decision to buy Oracle database licences due to:
multiple user environment
very broad OS support for server and client software
support of developer and front-end tools: forms, graphics, report
support of programming languages (OCI)
In the end: start with oracle 7.1

4. History of oracle platforms

5. Oracle Usage and Applications
450 Accounts have Oracle Resource enabled in DESY-Registry
Oracle Applications (no complete list)
Aleph/ExLibris, AMS, CAD CIM-DB/W1,
DACHS/INTERFLEX, Datebook, DOOR, EDMS,
GINFO, GIS/FMS, GWO, div H1 Applications, HASYLAB,
HASYLAB/JB, HERA-AS, HERA-B,
IT-Info, KDS, div M-Applications,
M-Logbuch, Mail-PA/-CTL, Mail-Sweaper, Mail-Reporting
MKK-Cad/-Climate/-Logbook/-Power/-Water, MKS-AMS, MKS-Epicsora, MKS-Toolbox
MCS Webarchiv, SCICON, Self-Registration, EDUCourses, MPY/XFEL
PIP/Phonebook, PITZ, POL, div PT/HS Applications, PVSS, PUBDB,
Registry, Registry-NAF, RQS
NOC WF-Stat, INFEE, IT-Sec Apps
SPMS/JACOW, SYMPHA, TTF/XFEL-DB
WWW-Apps, Web-Server-Registry, div Zeus-Applications
a.s.o.
ADF
APEX

6. Statistics the following administrative statistics are available in
an apex application
user logons per day    
user average concurrent logon per day    
user logons per hour - concurrent    
database storage    

7. Overview about oracle service
Application Server (10.2. / 10.3.)
RAC (Oracle )
System-Administration
APEX
Training / Workshops
System-Backup
Software Supply
Database-Support
Database-Administration
Data-Backup
Migration
Documentation
Applications-Server-Administration
Forms/Reports
Support in Developertools

8. Oracle RAC Cluster

9. Database Administration
user/application (Creation, Privileges, Resource management (Tablespace, Quota, CPU, Memory usage))
OS-, CS-, ASM-, Database monitoring and status reports
AWR/workload repository and application monitoring
performance findings and tuning advisors
troubleshooting triggered by users and applications
database services and SQL*NET/access to DBs
ASM (automatic storage management)
applying of patches [ rac software / db packages ]
goal:
keeping a shared resource usable for every user/application

10. Database/Data-Backup and Recovery
Database-Administration
on-line Database Backup 2 times the week
archive logs and database backup saved on ASM backup disk group
backup of ASM backup disk group in TSM
nightly export of user data (dumps)
User possibilities
undo retention of 4 hours (rollback)
recycle bin (dropped tables, not garantied)
Recovery options
recovering of database, tablespaces and datafiles
import of exported user data

11. Documentation providing of documentation on
-> services -> databases -> oracle
first steps to use oracle at desy
user environment in DB, description of tools
sqlplus
exp/imp
sqlloader
howtos to embed oracle access in c, java, perl, phython, php...
howto use ODBC with MS Office products
on-line books (oracle 10g documentation)

12. Trainings / Workshops Training Workshops
in house by desy oracle-service
in house with Oracle trainers by request
negotiation of fees (discount) for in-house and extern courses
Workshops
organization of workshop events (also by user requests)
inviting speakers from Oracle staff to actual topics
Apex
Forms/Reports – Migration → ADF
BI-Publisher
new SQL DB features
DOAG in house talks

13. Support / Consultance e-mail address: oracle.service@desy.de
announcements via mailing list:
consulting users:
troubleshooting,
data modelling,
sql & pl/sql,
performance & tuning,
apex,
j2ee/oc4j,
bi-publisher,
client software installation and configuration

14. database migration
Process of transforming data from a database system to oracle database system
the entire database schema include trigger and stored procedures … and data
usefully performed program-matically ***more or less Oracle Migration Workbench
precheck for datatypes advisable
data verification to determine whether
data is accurately transformed
data is complete
dependent applications are still working

15. Software Supply / Maintenance
Windows
NetInstall products
oracle client 10g (sqlplus, exp/imp, odbc/jdbc)
sql developer
jdeveloper
forms/reports available by request
Linux (sl4 & sl5)
oracle 10g client & sqldeveloper already available
other tools available by request
Solaris
oracle 10g client software

16. Processing of sql-statements
Current DB-parameter settings:
CURSOR_SHARING = EXACT
The database uses this parameter to control whether it will „auto-bind“ a SQL Statement.
Goals:
scalability and throughput
reducing load on the shared pool (sql area)
parse once / execute many
eliminating literal SQL

17. Query transformation engine
Processing chart
Sql-statement(s)
Statement Parser
Set of query blocks
SGA
Shared pool
CBO (Cost based optimizer)
Query transformation engine
Data dictionary cache
Library cache
Estimator
Plan generator
P-Code, Execution Plan
Query Execution

18. Processing of sql-statements
1. submit sql to server
2. determine meta data hash val (username, object-owner, session-parameter,...) and hash of sql statement
3. determine if meta-hash and sql-hash exist in shared pool
if not you will get the following overhead:
- CBO determines execution plan (CPU, I/O, access statistics)
- parsing/compilation of sql (library cache)
- storing parsed sql in shared pool (I/O, shared pool consumption)
4. execution of parsed sql statement
conclusion:
sql statements with literals have always different hash-values and produce overhead
using sql statements with bind variables benefit in avoiding overhead and
use less database resources and gain performance

19. Bind vs no Bind With Bind Variables Without Bind Variables
public void createStatement() throws SQLException {
rs = null;
pstmt = null;
try {
// Create statement
pstmt = conn.prepareStatement("SELECT ? FROM dual");
System.out.println("Start: " + new Date());
for (int i = 1; i < ; i++) {
// Use bind variable for subsitution
pstmt.setString(1, String.valueOf(i));
// Execute the query
rs = pstmt.executeQuery(); }
System.out.println("End: " + new Date());
} catch (SQLException se) {
System.out.println("SQL Exception:");
se.printStackTrace();
finally {
pstmt.close();
Die Ausführung der Klasse Bind liefert hingegen folgendes Resultat:
Start: Mon Jan 26 09:18:50 CEST 2009
End: Mon Jan 26 09:19:41 CEST 2009
Without Bind Variables
public void createStatement() throws SQLException {
rs = null;
stmt = null;
try {
// Get Connection
stmt = conn.createStatement();
System.out.println("Start: " + new Date());
for (int i = 0; i < ; i++) {
// Execute Statement
rs = stmt.executeQuery("SELECT " + i + " FROM dual"); }
System.out.println("End: " + new Date());
} catch (SQLException se) {
System.out.println("SQL Exception:");
se.printStackTrace();
finally {
// Close the result set, pstatement and the connection
stmt.close();
Die Ausführung dieser Klasse NoBind liefert folgendes Resultat:
Start: Mon Jan 26 09:00:33 CEST 2009
End: Mon Jan 26 09:05:21 CEST 2009

20. APEX – Application Express
What is APEX
a complete and integrated application development system and runtime system for web applications
application builder
sql workshop with query builder
utility area (data up-/download, schema ddl a.s.o.)
development framework via normal internet browser
applications are immediately available (after publishing the URL)
different authentication methods available incl. kerberos
APEX is available with each oracle-Database incl. Oracle XE
publicated as best successor for Forms & Reports

21. APEX Advantages intuitive user interface
convenient assistants for application building
interactive reports
complete designed layout-template
master detail forms and reports
webservices per mouse-click available
Flash-grafics
printer friendly output (e.g. pdf, word)
web compatible pl/sql editor
Note: APEX Workshop in June !!!

22. APEX @ DESY available at DESY since March 2008
up to now 15 Workspaces with currently 28 Applications (more or less complicated)
combined with bi-publisher report engine to generate the following output formats:
html / xml
pdf
cvs
excel / word
flash grafics

23. Oracle Service contact: oracle.service@desy.de
in addition you can contact us any time in case of
planing of database applications
data modelling
evaluation of new database applications and
any support questions