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Sun Microsystems 820434310 manual Client ORB Properties, Using multiple connections

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Client ORB Properties

ORB Settings

■Minimum Pool Size: The minimum number of threads in the ORB thread pool. Set to the average number of threads needed at a steady (RMI/ IIOP) load.

■Maximum Pool Size: The maximum number of threads in the ORB thread pool.

■Idle Timeout: Number of seconds to wait before removing an idle thread from pool. Allows shrinking of the thread pool.

■Number of Work Queues

In particular, the maximum pool size is important to performance. For more information, see “Thread Pool Sizing” on page 74.

Client ORB Properties

Specify the following properties as command-line arguments when launching the client program. You do this by using the following syntax when starting the Java VM:

-Dproperty=value

Controlling connections between client and server ORB

When using the default JDK ORB on the client, a connection is established from the client ORB to the application server ORB every time an initial context is created. To pool or share these connections when they are opened from the same process by adding to the configuration on the client ORB.

-Djava.naming.factory.initial=com.sun.appserv.naming.S1ASCtxFactory

Using multiple connections

Note – The property com.sun.appserv.iiop.orbconnections is not supported in Sun GlassFish Enterprise Server, version 8.x.

When using the context factory, (com.sun.appserv.naming.S1ASCtxFactory), you can specify the number of connections to open to the server from the client ORB with the property com.sun.appserv.iiop.orbconnections.

The default value is one. Using more than one connection may improve throughput for network-intense applications. The configuration changes are specified on the client ORB(s) by adding the following jvm-options:

-Djava.naming.factory.initial=com.sun.appserv.naming.S1ASCtxFactory

-Dcom.sun.appserv.iiop.orbconnections=value

Chapter 3 • Tuning the Enterprise Server

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Sun Microsystems 820434310 manual Client ORB Properties, Controlling connections between client and server ORB

Contents

Sun Microsystems, Inc 4150 Network Circle Santa Clara, CA U.S.A Sun GlassFish Enterprise Server 2.1 Performance Tuning GuideThis distribution may include materials developed by third parties Contents Tuning Tips for Specific Types of EJB Components Thread Pool Settings ContentsJava Virtual Machine Settings Solaris 10 Platform-Specific Tuning Information6 Tuning for High-Availability Java EE Application Model FiguresPage Tuning 64-bit Systems for Performance Benchmarking Performance Tuning RoadmapTables Page Heap Configuration on Solaris ExamplesHeap Configuration on Windows Page Sun GlassFish Enterprise Server Documentation Set PrefaceTABLE P-2 Default Paths and File Names Default Paths and File NamesTABLE P-1 Books in the Enterprise Server Documentation Set ContinuedTypographic Conventions Symbol ConventionsThe following table explains symbols that might be used in this book Symbol ConventionsThird-Party Web Site References Documentation, Support, and TrainingSun Welcomes Your Comments Indicates menu item“General Tuning Concepts” on page “Further Information” on page TuningProcess Overview “Process Overview” on pagePerformance Tuning Roadmap Performance Tuning SequenceApplication Architecture Understanding Operational Requirements“Application Architecture” on page “Security Requirements” on page “Hardware Resources” on pageServer-Side Presentation Client-Side PresentationServer-Side Enterprise Business Logic Information System BrowserSecurity Requirements User Authentication and AuthorizationEncryption Hardware Resources Administration General Tuning ConceptsAdministration Guide Capacity Planning To Determine Capacity User Expectations1 Determine performance on a single CPU 2 Determine vertical scalabilityFurther Information Further Information“Java Server Page and Servlet Tuning” on page Tuning Your Application“EJB Performance Tuning” on page Java Programming GuidelinesDeclare Methods as final Only If Necessary Assign null to Variables That Are No Longer NeededDeclare Constants as static final Avoid FinalizersSynchronize Only When Necessary Java Server Page and Servlet TuningDeclare Method Arguments final Use DataHandlers for SOAP AttachmentsGeneral Guidelines Suggested Coding PracticesAvoid Shared Modified Class Variables HTTP Session HandlingDisable Security Manager Configuration and Deployment TipsOptimize SSL “Using Local and Remote Interfaces” on page EJB Performance Tuning“Using Special Techniques” on page “Tuning Tips for Specific Types of EJB Components” on pageThe following is a sample of the monitoring output Monitoring Individual EJB Components Use High Performance Beans General GuidelinesUse Caching Cache and Pool Tuning Tips Using Local and Remote InterfacesUse the Appropriate Stubs Remove Unneeded Stateful Session BeansPrefer Local Interfaces Using Pass-By-Reference SemanticsImproving Performance of EJB Transactions Use XA-Capable Data Sources Only When NeededUse Container-Managed Transactions Don’t Encompass User Input TimeConfigure JDBC Resources as One-Phase Commit Resources Using Special TechniquesUse the Least Expensive Transaction Attribute Version ConsistencyOtherwise, ejbStore stores the data and completes as normal Request Partitioning To enable request partitioning2 Add the additional threadpool IDs to the Application Server’s ORB Entity Beans Tuning Tips for Specific Types of EJB ComponentsStateful Session Beans 4 Restart the Application ServerStateless Session Beans Checkpoint only when neededRead-Only Entity Beans Refresh period Pre-fetching Container Managed Relationship CMR BeansThis clause indicates an outer join. These OrderLines are pre-fetched Use JDBC Directly JDBC and Database AccessEncapsulate Business Logic in Entity EJB Components Close ConnectionsUse getConnection Tuning Message-Driven BeansTune the Message-Driven Bean’s Pool Size Limit Use of JMS Connections Cache Bean-Specific ResourcesDeployment Settings Tuning the Enterprise Server“Deployment Settings” on page “Logger Settings” on page “Web Container Settings” on page “EJB Container Settings” on pageDisable Auto-deployment Logger SettingsDisable Dynamic Application Reloading Use Pre-compiled JavaServer PagesGeneral Settings Web Container SettingsSession Properties Session Timeout “Session Properties Session Timeout” on pageManager Properties Reap Interval Disable Dynamic JSP ReloadingTuning the EJB Container EJB Container SettingsMonitoring the EJB Container Overview of EJB Pooling and CachingEJB Pool Settings Tuning the EJB PoolEJB Cache Settings Tuning the EJB CacheRemoval Timeout Pool and Cache Settings for Individual EJB ComponentsTimeout Max Cache SizeDetermining the best commit option Commit OptionTransaction Service Settings Java Message Service SettingsMonitoring the Transaction Service Viewing Monitoring InformationDisable Distributed Transaction Logging Tuning the Transaction ServiceMonitoring the HTTP Service HTTP Service SettingsRecover On Restart Automatic Recovery “Monitoring the HTTP Service” on pageDNS Cache Information dns EnabledCacheEntries CurrentCacheEntries / MaxCacheEntries “DNS Cache Information dns” on pageCaching DNS Entries HitRatioLimit DNS Lookups to Asynchronous NameLookupsKeep Alive keep-alive File Cache Information file-cacheAccess Log Tuning the HTTP Service“Access Log” on page “Request Processing” on page Connection QueueThread Count Request TimeoutInitial Thread Count Buffer Length Keep AliveMax Connections HTTP Protocol DNS Lookup EnabledHTTP File Cache Time OutHash Init Size Max Files CountMax Age Small/Medium File Size and File Size LimitNetwork Address Tuning HTTP Listener SettingsAcceptor Threads Overview ORB SettingsHow a Client Connects to the ORB Monitoring the ORBConnection Statistics Tuning the ORBThread Pools ORB Thread Pool Parameters Tunable ORB ParametersClient ORB Properties Using multiple connectionsControlling connections between client and server ORB Examining IIOP Messages Thread Pool SizingLoad Balancing Improving ORB Performance with Java Serialization Tuning Thread Pools Unix /Linux only Thread Pool SettingsTo Enable Java Serialization Using JSG for Application ClientsTuning JDBC Connection Pools JDBC Connection Pool Settings“Pool Size Settings” on page ResourcesTimeout Settings Pool Size Settings“Timeout Settings” on page “Isolation Level Settings” on pageConnection Validation Settings Isolation Level SettingsTransaction Support Connector Connection Pool SettingsChapter 3 Tuning the Enterprise Server asadmin create-connector-connection-pool --raname jdbcraconnectiondefinition javax.sql.DataSource transactionsupport LocalTransaction TESTPOOLPage Java Virtual Machine Settings Tuning the Java Runtime System“Java Virtual Machine Settings” on page “Managing Memory and Garbage Collection” on page“Other Garbage Collector Settings” on page Tuning the Garbage Collector“Tuning the Java Heap” on page “Rebasing DLLs on Windows” on page Managing Memory and Garbage Collection2 Configure HADB timeouts, as described in the Administration Guide 1 Make sure that the system is not using 100 percent of its CPU3 Configure the CMS collector in the server instance Choosing the Garbage Collection AlgorithmTracing Garbage Collection Other Garbage Collector Settings“Heap Tuning Parameters” on page Tuning the Java HeapGuidelines for Java Heap Sizing “Guidelines for Java Heap Sizing” on pageXmsvalue Xmxvalue Heap Tuning ParametersSurvivor Ratio Sizing Rebasing DLLs on WindowsTo rebase the Application Server’s DLLs 1 Make installdir\ bin the default directory. cd installdir\bin5 Restart the Application Server Example 4-2 Heap Configuration on WindowsJava HotSpot VM Options Frequently Asked Questions About the Java HotSpot Virtual MachinePerformance Documentation for the Java HotSpot VM Java performance web pagePage “Solaris 10 Platform-Specific Tuning Information” on page Tuning the Operating System and Platform“Tuning for the Solaris OS” on page “Linux Configuration” on page “Tuning for Solaris on x86” on pageDisk Space MemoryNetworking Npeakr / tTuning for the Solaris OS Solaris 10 Platform-Specific Tuning InformationTuning Parameters “Tuning Parameters” on page “File Descriptor Setting” on pageon page Sizing the Connection Hash TableFile Descriptor Setting Linux Configuration“File Descriptors” on page “IP Stack Settings” on page Tuning for Solaris onFile Descriptors IP Stack Settings“Network Interface” on page “Disk I/O Settings” on page Tuning for Linux platforms“TCP/IP Settings” on page “File Descriptors” on page “Virtual Memory” on pageVirtual Memory TCP/IP Settings Disk I/O SettingsTo tune the TCP/IP settings 2 Enable direct memory access DMATuning Operating System and TCP Settings Tuning UltraSPARC T1-Based Systems4 Reboot the system 2 Add the following to /etc/sysctl.confNote that the IPGE driver version is TABLE 5-2 Tuning 64-bit Systems for Performance BenchmarkingNetwork Configuration Disk ConfigurationStart Options LDPRELOAD32=/usr/lib/mpss.so.1 export LDPRELOAD32 export MPSSHEAP=4M Tuning HADB Tuning for High-Availability“Tuning HADB” on page “Tuning the Enterprise Server for High-Availability” on pagehadbm set TotalDatadeviceSizePerNode Tuning Data Device SizePlacing HADB files on Physical Disks Memory AllocationPerformance “Timeouts” on pageDataBufferPoolSize “DataBufferPoolSize” on page “LogBufferSize” on pageLogBufferSize Tuning DataBufferPoolSizeInternalLogbufferSize Tuning LogBufferSizeNumberOfLocks Tuning InternalLogbufferSizeCalculating the number of locks Tuning NumberOfLocksSummary JDBC connection pool timeouts TimeoutsLoad Balancer timeouts Operating System Configuration Tuning the Enterprise Server for High-AvailabilityHADB timeouts “Tuning Session Persistence Frequency” on pageWeb-method Tuning Session Persistence FrequencyTime-based Session Size Session Persistence Scopesession modified-sessionCheckpointing Stateful Session Beans Configuring the JDBC Connection PoolEnabling the Health Checker Configuring the Load BalancerConnection Pools” on page health-checker Page caching Continued servlet results, 31 capacity planning IndexPage Page monitoring Continued transaction service Page x86 XA-capable data sources, 38-39 -Xms Xmx, 88 Sun GlassFish Enterprise Server 2.1 Performance Tuning Guide JanuaryIndex