Log:
Évaluations - 0, GPA: 0 ( )

Instructions HP, Modèle HP NonStop G-Series

Fabricant : HP
Taille : 120.05 kb
Nom Fichier :
Langue d'enseignement: en
Aller à la télécharger



Par ce dispositif a également d'autres instructions :

Facilité d'utilisation


HP NonStop JDBC Type 4 Driver
Performance Tuning Guide for Version 1.0
3 NonStop JDBC Type 4 Driver Tuning Tips
3.1 Configuration Tips

Connection pooling. Use connection pooling either explicitly with your own
implementation, the Type 4 driver connection pooling mechanism (the default
is no connection pooling) or implicitly through a product that supports
connection pooling, such as BEA Weblogic Server, or IBM WebSphere, etc.

Maximum pool size. Use the maxPoolSize and minPoolSize properties to
tune the connection pool.
o
The default maxPoolSize is 0—“unlimited” pool size.
o
The default minPoolSize is 0—connections are never physically closed
but are added to the connection pool.
o
Set minPoolSize to the anticipated number of connections to be used.
For example, set minPoolSize to the number of application threads.

Statement pooling. Set the maxStatements property to enable statement
pooling (the default is no statement pooling). For example,
SQLMXDataSource.setMaxStatements(100).

Logging. Turn off logging. Set the t4LogLevel property to OFF (the default is
OFF). Set the DriverManager.setLogWriter() and/or
DataSource.setLogWriter() methods to null (the default is null).

Heap manager. Increase or decrease the Java virtual machine (JVM) heap
size to balance performance versus memory usage. The Type 4 driver creates
objects that must be garbage collected by the JVM. For additional information
on JVM heap optimization, see the Tuning Garbage Collection with the 1.4.2
Java™ Virtual Machine
at http://java.sun.com/docs/hotspot/gc1.4.2/ and
Turbo-charging Java HotSpot Virtual Machine, v1.4.x to Improve the
Performance and Scalability of Application Servers
at
http://java.sun.com/developer/technicalArticles/Programming/turbo/.
3.2 Design and Programming Tips

• Do not use the same connection simultaneously in different threads. The
connection’s operations will be serialized. Use different connections with
different threads to get parallel execution.

• Use the same connection to execute multiple statements. Closing and
reopening a connection can be very costly.

• When using connection pooling, avoid setting the connection’s catalog,
schema, transaction isolation, and autocommit attributes programmatically at
Page 2
Hewlett-Packard Company — 529619-001
November 29, 2004


...

Ce manuel est également adapté pour les modèles :
Ordinateurs - HP NonStop L-Series (120.05 kb)

Écrivez votre propre critique du dispositif



Texte du message
Votre nom :
Entrez les deux chiffres :
capcha





catégories