EJB Container Settings | Sun Microsystems 820434310 specs

EJB Container Settings

EJB Container Settings

The EJB Container has many settings that affect performance. As with other areas, use monitor the EJB Container to track its execution and performance.

Monitoring the EJB Container

Monitoring the EJB container is disabled by default. Enable monitoring with the Admin Console under Configurations > config-name> Monitoring. Set the monitoring level to LOW for to monitor all deployed EJB components, EJB pools, and EJB caches. Set the monitoring level to HIGH to also monitor EJB business methods.

Tuning the EJB Container

The EJB container caches and pools EJB components for better performance. Tuning the cache and pool properties can provide significant performance benefits to the EJB container. Set EJB cache and pool settings in the Admin Console Configurations > config-name> EJB Container (EJB Settings).

The pool settings are valid for stateless session and entity beans while the cache settings are valid for stateful session and entity beans.

Overview of EJB Pooling and Caching

Both stateless session beans and entity beans can be pooled to improve server performance. In addition, both stateful session beans and entity beans can be cached to improve performance.

TABLE 3–1Bean Type Pooling or Caching

Bean Type	Pooled	Cached

Stateless Session	Yes	No

Stateful Session	No	Yes

Entity	Yes	Yes

The difference between a pooled bean and a cached bean is that pooled beans are all equivalent and indistinguishable from one another. Cached beans, on the contrary, contain conversational state in the case of stateful session beans, and are associated with a primary key in the case of entity beans. Entity beans are removed from the pool and added to the cache on ejbActivate() and removed from the cache and added to the pool on ejbPassivate(). ejbActivate() is called by the container when a needed entity bean is not in the cache. ejbPassivate() is called by the container when the cache grows beyond its configured limits.

Chapter 3 • Tuning the Enterprise Server

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Sun Microsystems 820434310 manual EJB Container Settings, Monitoring the EJB Container, Tuning the EJB Container

Contents

Sun Microsystems, Inc Network Circle Santa Clara, CA Sun GlassFish Enterprise Server 2.1 Performance Tuning Guide 090304@21990 Contents Tuning the Enterprise Server 100 Tuning for High-Availability Figures Page Tables Page Examples Page Table P-1Books in the Enterprise Server Documentation Set Sun GlassFish Enterprise Server Documentation Set Table P-2Default Paths and File Names Default Paths and File Names Symbol Conventions Symbol ConventionsTypographic Conventions Table P-3Typographic Conventions Sun Welcomes Your Comments Documentation, Support, and TrainingThird-Party Web Site References Process Overview 1Performance Tuning Roadmap Performance Tuning Roadmap Performance Tuning Sequence Application Architecture Understanding Operational Requirements Client-Side Presentation Encryption User Authentication and AuthorizationSecurity Requirements Hardware Resources Administration General Tuning Concepts 2Factors That Affect Performance Capacity Planning To Determine Capacity User Expectations Further Information Use StringBuffer to Concatenate Strings Java Programming GuidelinesAvoid Serialization and Deserialization Assign null to Variables That Are No Longer Needed String str = testing str = str + abcDeclare Methods as final Only If Necessary Declare Constants as static final Synchronize Only When Necessary Java Server Page and Servlet TuningDeclare Method Arguments final Use DataHandlers for Soap Attachments General Guidelines Suggested Coding PracticesAvoid Shared Modified Class Variables Http Session Handling Optimize SSL Configuration and Deployment TipsDisable Security Manager Monitoring EJB Components EJB Performance TuningGoals Following is a sample of the monitoring output Monitoring Individual EJB Components Asadmin get -m monitorableObject Use Caching General GuidelinesUse High Performance Beans Cache and Pool Tuning Tips Using Local and Remote InterfacesUse the Appropriate Stubs Remove Unneeded Stateful Session Beans Prefer Local Interfaces Using Pass-By-Reference Semantics Improving Performance of EJB Transactions Configure Jdbc Resources as One-Phase Commit Resources Using Special TechniquesUse the Least Expensive Transaction Attribute Version Consistency Entity-mapping cmp-field-mapping When new.VCVERSIONNUMBER = old.VCVERSIONNUMBER Declare To enable request partitioningRequest Partitioning Cmp-field-mapping consistency Stateful Session Beans Tuning Tips for Specific Types of EJB ComponentsEntity Beans Read-Only Entity Beans Checkpoint only when neededStateless Session Beans Refresh period Pre-fetching Container Managed Relationship CMR Beans OrderTable.OrderID = OrderLineTable.OrderLineOrderID Use Jdbc Directly Jdbc and Database AccessEncapsulate Business Logic in Entity EJB Components Close Connections Asadmin set server.mdb-container.max-pool-size = value Tuning Message-Driven BeansUse getConnection Tune the Message-Driven Bean’s Pool Size Limit Use of JMS Connections Cache Bean-Specific Resources Deployment Settings Tuning the Enterprise Server Disable Auto-deployment Logger SettingsDisable Dynamic Application Reloading Use Pre-compiled JavaServer Pages General Settings Web Container SettingsSession Properties Session Timeout Log Levels Manager Properties Reap Interval Disable Dynamic JSP Reloading Tuning the EJB Container EJB Container SettingsMonitoring the EJB Container Overview of EJB Pooling and Caching EJB Pool Settings Tuning the EJB Pool EJB Cache Settings Tuning the EJB Cache Pool and Cache Settings for Individual EJB Components Determining the best commit option Commit Option Transaction Service Settings Java Message Service SettingsMonitoring the Transaction Service Viewing Monitoring Information Asadmin get -m serverInstance.transaction-service Tuning the Transaction ServiceDisable Distributed Transaction Logging Monitoring the Http Service Http Service SettingsRecover On Restart Automatic Recovery Keypoint Interval List --user admin --port EnabledProperty name=statsProfilingEnabled value=false DNS Cache Information dns Caching DNS Entries HitRatioLimit DNS Lookups to Asynchronous NameLookups Keep Alive keep-alive File Cache Information file-cache Access Log Tuning the Http ServiceConnection Queue Request Processing Initial Thread Count Request TimeoutThread Count Max Connections Keep AliveBuffer Length Http Protocol DNS Lookup EnabledHttp File Cache Time Out Hash Init Size Max Files CountMax Age Small/Medium File Size and File Size Limit Acceptor Threads Tuning Http Listener SettingsNetwork Address Overview ORB SettingsHow a Client Connects to the ORB Monitoring the ORB 3Tunable ORB Settings Tuning the ORBConnection Statistics Thread Pools ORB Thread Pool Parameters Tunable ORB Parameters Controlling connections between client and server ORB Using multiple connectionsClient ORB Properties Load Balancing Thread Pool SizingExamining Iiop Messages Improving ORB Performance with Java Serialization Tuning Thread Pools Unix /Linux only Thread Pool SettingsTo Enable Java Serialization Using JSG for Application Clients Tuning Jdbc Connection Pools Jdbc Connection Pool SettingsResources Monitoring Jdbc Connection Pools 4Connection Pool Sizing Pool Size SettingsTimeout Settings Connection Validation Settings Isolation Level Settings Transaction Support Connector Connection Pool Settings Testpool Page Java Virtual Machine Settings Tuning the Java Runtime System Managing Memory and Garbage Collection Tuning the Garbage Collector Additional Information Choosing the Garbage Collection AlgorithmTo use the CMS collector Tracing Garbage Collection Other Garbage Collector Settings 1Maximum Address Space Per Process Tuning the Java HeapGuidelines for Java Heap Sizing Xmsvalue Xmxvalue Heap Tuning Parameters Survivor Ratio Sizing Example 4-1Heap Configuration on SolarisRebasing DLLs on Windows To rebase the Application Server’s DLLs Enter this command rebase -b 0x6000000 *.dll For more information on tuning the JVM, see Page Processors Server Scaling Networking MemoryDisk Space Tuning Parameters Netstat -nP tcpwc -l Sizing the Connection Hash TableNdd -get /dev/tcp tcpconnhash File Descriptor Setting Linux Configuration File Descriptors on IP Stack Settings on Tuning for Solaris on File Descriptors IP Stack Settings Tuning for Linux platforms Session required /lib/security/pamlimits.so Virtual MemorySoft Nofile 65535 Hard TCP/IP Settings Disk I/O SettingsTo tune the TCP/IP settings Network Interface Tuning Operating System and TCP Settings Tuning UltraSPARC T1-Based Systems 2Tuning 64-bit Systems for Performance Benchmarking Start Options Disk ConfigurationNetwork Configuration 106 Calculating Hadb Data Device Size Tuning HadbDisk Use Hadbm set TotalDatadeviceSizePerNode Tuning Data Device Size Placing Hadb files on Physical Disks Memory AllocationBeware last flush/fputs took too long Vmstat -S NodeNo TotalSize FreeSize Usage 512 504 PerformanceDataBufferPoolSize Hadbm set DataBufferPoolSize Tuning DataBufferPoolSizeLogBufferSize InternalLogbufferSize Tuning LogBufferSizeHadbm resourceinfo --logbuf Node No Avail Free Size NumberOfLocks Tuning InternalLogbufferSizeHadbm resourceinfo --nilogbuf Hadbm set InternalLogbufferSize Summary Tuning NumberOfLocksCalculating the number of locks Jdbc connection pool timeouts TimeoutsLoad Balancer timeouts Node No Avail Free Waits 50000 Operating System Configuration Tuning the Enterprise Server for High-AvailabilityHadb timeouts No space left on device Time-based Tuning Session Persistence FrequencyWeb-method Session Size Session Persistence ScopeSession Modified-session Checkpointing Stateful Session Beans Configuring the Jdbc Connection Pool Enabling the Health Checker Configuring the Load Balancer Tuning for High-Availability 121 122 Index Index 125 Monitoring transaction service Session timeout 128