Thread Pool Settings | Sun Microsystems 820434310 instruction

Thread Pool Settings

▼To Enable Java Serialization

You must set this property on all servers that you want to use JSG.

1In the tree component, expand the Configurations node.

2Expand the desired node.

3Select the JVM Settings node

4In the JVM Settings page, choose the JVM Options tab.

5Click Add JVM Option, and enter the following value:

-Dcom.sun.CORBA.encoding.ORBEnableJavaSerialization=true

6Click Save

7Restart the Application Server.

Using JSG for Application Clients

If an application uses standalone non-web clients (application clients), and you want to use JSG, you must also set a system property for the client applications. A common way to do this is to add the property to the Java command line used to start the client application, for example:

java -Dcom.sun.CORBA.encoding.ORBEnableJavaSerialization=true -Dorg.omg.CORBA.ORBInitialHost=gollum -Dorg.omg.CORBA.ORBInitialPort=35309

MyClientProgram

Thread Pool Settings

You can both monitor and tune thread pool settings through the Admin Console. To configure monitoring with the Admin Console, open the page Configurations > config-name> Monitoring. To view monitoring information with the Admin Console, open the page Stand-Alone Instances > instance-name(Monitor).

Tuning Thread Pools (Unix /Linux only)

Configure thread pool settings through the Admin Console at Configurations > config-name> Thread Pools.

Since threads on Unix/Linux are always operating system (OS)-scheduled, as opposed to user-scheduled, Unix/Linux users do not need to use native thread pools. Therefore, this option

76	Sun GlassFish Enterprise Server 2.1 Performance Tuning Guide • January 2009

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Sun Microsystems 820434310 manual Thread Pool Settings, Tuning Thread Pools Unix /Linux only, To Enable Java Serialization

Contents

Sun GlassFish Enterprise Server 2.1 Performance Tuning Guide Sun Microsystems, Inc Network Circle Santa Clara, CA 090304@21990 Contents Tuning the Enterprise Server 100 Tuning for High-Availability Figures Page Tables Page Examples Page Sun GlassFish Enterprise Server Documentation Set Table P-1Books in the Enterprise Server Documentation Set Default Paths and File Names Table P-2Default Paths and File Names Symbol Conventions Symbol ConventionsTypographic Conventions Table P-3Typographic Conventions Third-Party Web Site References Documentation, Support, and TrainingSun Welcomes Your Comments 1Performance Tuning Roadmap Process Overview Performance Tuning Sequence Performance Tuning Roadmap Understanding Operational Requirements Application Architecture Client-Side Presentation Security Requirements User Authentication and AuthorizationEncryption Hardware Resources General Tuning Concepts Administration Capacity Planning 2Factors That Affect Performance User Expectations To Determine Capacity Further Information Avoid Serialization and Deserialization Java Programming GuidelinesUse StringBuffer to Concatenate Strings String str = testing str = str + abc Assign null to Variables That Are No Longer NeededDeclare Methods as final Only If Necessary Declare Constants as static final Java Server Page and Servlet Tuning Synchronize Only When NecessaryDeclare Method Arguments final Use DataHandlers for Soap Attachments Suggested Coding Practices General GuidelinesAvoid Shared Modified Class Variables Http Session Handling Disable Security Manager Configuration and Deployment TipsOptimize SSL Goals EJB Performance TuningMonitoring EJB Components Following is a sample of the monitoring output Asadmin get -m monitorableObject Monitoring Individual EJB Components Use High Performance Beans General GuidelinesUse Caching Using Local and Remote Interfaces Cache and Pool Tuning TipsUse the Appropriate Stubs Remove Unneeded Stateful Session Beans Using Pass-By-Reference Semantics Prefer Local Interfaces Improving Performance of EJB Transactions Using Special Techniques Configure Jdbc Resources as One-Phase Commit ResourcesUse the Least Expensive Transaction Attribute Version Consistency Entity-mapping cmp-field-mapping To enable request partitioning When new.VCVERSIONNUMBER = old.VCVERSIONNUMBER DeclareRequest Partitioning Cmp-field-mapping consistency Entity Beans Tuning Tips for Specific Types of EJB ComponentsStateful Session Beans Stateless Session Beans Checkpoint only when neededRead-Only Entity Beans Pre-fetching Container Managed Relationship CMR Beans Refresh period OrderTable.OrderID = OrderLineTable.OrderLineOrderID Jdbc and Database Access Use Jdbc DirectlyEncapsulate Business Logic in Entity EJB Components Close Connections Tuning Message-Driven Beans Asadmin set server.mdb-container.max-pool-size = valueUse getConnection Tune the Message-Driven Bean’s Pool Size Cache Bean-Specific Resources Limit Use of JMS Connections Tuning the Enterprise Server Deployment Settings Logger Settings Disable Auto-deploymentDisable Dynamic Application Reloading Use Pre-compiled JavaServer Pages Web Container Settings General SettingsSession Properties Session Timeout Log Levels Disable Dynamic JSP Reloading Manager Properties Reap Interval EJB Container Settings Tuning the EJB ContainerMonitoring the EJB Container Overview of EJB Pooling and Caching Tuning the EJB Pool EJB Pool Settings Tuning the EJB Cache EJB Cache Settings Pool and Cache Settings for Individual EJB Components Commit Option Determining the best commit option Java Message Service Settings Transaction Service SettingsMonitoring the Transaction Service Viewing Monitoring Information Disable Distributed Transaction Logging Tuning the Transaction ServiceAsadmin get -m serverInstance.transaction-service Http Service Settings Monitoring the Http ServiceRecover On Restart Automatic Recovery Keypoint Interval Enabled List --user admin --portProperty name=statsProfilingEnabled value=false DNS Cache Information dns HitRatio Caching DNS EntriesLimit DNS Lookups to Asynchronous NameLookups File Cache Information file-cache Keep Alive keep-alive Tuning the Http Service Access LogConnection Queue Request Processing Thread Count Request TimeoutInitial Thread Count Buffer Length Keep AliveMax Connections DNS Lookup Enabled Http ProtocolHttp File Cache Time Out Max Files Count Hash Init SizeMax Age Small/Medium File Size and File Size Limit Network Address Tuning Http Listener SettingsAcceptor Threads ORB Settings OverviewHow a Client Connects to the ORB Monitoring the ORB Tuning the ORB 3Tunable ORB SettingsConnection Statistics Thread Pools Tunable ORB Parameters ORB Thread Pool Parameters Client ORB Properties Using multiple connectionsControlling connections between client and server ORB Examining Iiop Messages Thread Pool SizingLoad Balancing Improving ORB Performance with Java Serialization Thread Pool Settings Tuning Thread Pools Unix /Linux onlyTo Enable Java Serialization Using JSG for Application Clients Jdbc Connection Pool Settings Tuning Jdbc Connection PoolsResources Monitoring Jdbc Connection Pools Timeout Settings Pool Size Settings4Connection Pool Sizing Isolation Level Settings Connection Validation Settings Connector Connection Pool Settings Transaction Support Testpool Page Tuning the Java Runtime System Java Virtual Machine Settings Tuning the Garbage Collector Managing Memory and Garbage Collection To use the CMS collector Choosing the Garbage Collection AlgorithmAdditional Information Other Garbage Collector Settings Tracing Garbage Collection Guidelines for Java Heap Sizing Tuning the Java Heap1Maximum Address Space Per Process Heap Tuning Parameters Xmsvalue Xmxvalue Rebasing DLLs on Windows Example 4-1Heap Configuration on SolarisSurvivor Ratio Sizing Enter this command rebase -b 0x6000000 *.dll To rebase the Application Server’s DLLs For more information on tuning the JVM, see Page Server Scaling Processors Disk Space MemoryNetworking Tuning Parameters Ndd -get /dev/tcp tcpconnhash Sizing the Connection Hash TableNetstat -nP tcpwc -l Linux Configuration File Descriptor Setting Tuning for Solaris on File Descriptors on IP Stack Settings on IP Stack Settings File Descriptors Tuning for Linux platforms Soft Nofile 65535 Hard Virtual MemorySession required /lib/security/pamlimits.so Disk I/O Settings TCP/IP SettingsTo tune the TCP/IP settings Network Interface Tuning UltraSPARC T1-Based Systems Tuning Operating System and TCP Settings 2Tuning 64-bit Systems for Performance Benchmarking Network Configuration Disk ConfigurationStart Options 106 Disk Use Tuning HadbCalculating Hadb Data Device Size Tuning Data Device Size Hadbm set TotalDatadeviceSizePerNode Memory Allocation Placing Hadb files on Physical DisksBeware last flush/fputs took too long Vmstat -S DataBufferPoolSize PerformanceNodeNo TotalSize FreeSize Usage 512 504 LogBufferSize Tuning DataBufferPoolSizeHadbm set DataBufferPoolSize Tuning LogBufferSize InternalLogbufferSizeHadbm resourceinfo --logbuf Node No Avail Free Size Tuning InternalLogbufferSize NumberOfLocksHadbm resourceinfo --nilogbuf Hadbm set InternalLogbufferSize Calculating the number of locks Tuning NumberOfLocksSummary Timeouts Jdbc connection pool timeoutsLoad Balancer timeouts Node No Avail Free Waits 50000 Tuning the Enterprise Server for High-Availability Operating System ConfigurationHadb timeouts No space left on device Web-method Tuning Session Persistence FrequencyTime-based Session Persistence Scope Session SizeSession Modified-session Configuring the Jdbc Connection Pool Checkpointing Stateful Session Beans Configuring the Load Balancer Enabling the Health Checker Tuning for High-Availability 121 122 Index Index 125 Monitoring transaction service Session timeout 128