Server Scaling, Processors | Sun Microsystems 820434310 specs

C 5H A P T E R 5

Tuning the Operating System and Platform

This chapter discusses tuning the operating system (OS) for optimum performance. It discusses the following topics:

■“Server Scaling” on page 93

■“Solaris 10 Platform-Specific Tuning Information” on page 95

■“Tuning for the Solaris OS” on page 95

■“Linux Configuration” on page 97

■“Tuning for Solaris on x86” on page 98

■“Tuning for Linux platforms” on page 100

■“Tuning UltraSPARC T1–Based Systems” on page 103

Server Scaling

This section provides recommendations for optimal performance scaling server for the following server subsystems:

■“Processors” on page 93

■“Memory” on page 94

■“Disk Space” on page 94

■“Networking” on page 94

Processors

The Enterprise Server automatically takes advantage of multiple CPUs. In general, the effectiveness of multiple CPUs varies with the operating system and the workload, but more processors will generally improve dynamic content performance.

Static content involves mostly input/output (I/O) rather than CPU activity. If the server is tuned properly, increasing primary memory will increase its content caching and thus increase

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Sun Microsystems 820434310 manual Server Scaling, Processors

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 Documentation, Support, and Training Third-Party Web Site ReferencesSun Welcomes Your Comments Process Overview 1Performance Tuning Roadmap Performance Tuning Roadmap Performance Tuning Sequence Application Architecture Understanding Operational Requirements Client-Side Presentation User Authentication and Authorization Security RequirementsEncryption Hardware Resources Administration General Tuning Concepts 2Factors That Affect Performance Capacity Planning To Determine Capacity User Expectations Further Information Java Programming Guidelines Avoid Serialization and DeserializationUse StringBuffer to Concatenate Strings 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 Configuration and Deployment Tips Disable Security ManagerOptimize SSL EJB Performance Tuning GoalsMonitoring EJB Components Following is a sample of the monitoring output Monitoring Individual EJB Components Asadmin get -m monitorableObject General Guidelines Use High Performance BeansUse Caching 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 Tuning Tips for Specific Types of EJB Components Entity BeansStateful Session Beans Checkpoint only when needed Stateless Session BeansRead-Only Entity 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 Tuning the Transaction Service Disable Distributed Transaction LoggingAsadmin get -m serverInstance.transaction-service 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 Request Timeout Thread CountInitial Thread Count Keep Alive Buffer LengthMax Connections Http Protocol DNS Lookup EnabledHttp File Cache Time Out Hash Init Size Max Files CountMax Age Small/Medium File Size and File Size Limit Tuning Http Listener Settings Network AddressAcceptor Threads 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 Using multiple connections Client ORB PropertiesControlling connections between client and server ORB Thread Pool Sizing Examining Iiop MessagesLoad Balancing 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 Pool Size Settings Timeout Settings4Connection Pool Sizing 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 Choosing the Garbage Collection Algorithm To use the CMS collectorAdditional Information Tracing Garbage Collection Other Garbage Collector Settings Tuning the Java Heap Guidelines for Java Heap Sizing1Maximum Address Space Per Process Xmsvalue Xmxvalue Heap Tuning Parameters Example 4-1Heap Configuration on Solaris Rebasing DLLs on WindowsSurvivor Ratio Sizing 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 Memory Disk SpaceNetworking Tuning Parameters Sizing the Connection Hash Table Ndd -get /dev/tcp tcpconnhashNetstat -nP tcpwc -l 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 Virtual Memory Soft Nofile 65535 HardSession required /lib/security/pamlimits.so 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 Disk Configuration Network ConfigurationStart Options 106 Tuning Hadb Disk UseCalculating Hadb Data Device Size Hadbm set TotalDatadeviceSizePerNode Tuning Data Device Size Placing Hadb files on Physical Disks Memory AllocationBeware last flush/fputs took too long Vmstat -S Performance DataBufferPoolSizeNodeNo TotalSize FreeSize Usage 512 504 Tuning DataBufferPoolSize LogBufferSizeHadbm set DataBufferPoolSize InternalLogbufferSize Tuning LogBufferSizeHadbm resourceinfo --logbuf Node No Avail Free Size NumberOfLocks Tuning InternalLogbufferSizeHadbm resourceinfo --nilogbuf Hadbm set InternalLogbufferSize Tuning NumberOfLocks Calculating the number of locksSummary 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 Tuning Session Persistence Frequency Web-methodTime-based 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