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Sun Microsystems 820434310 Tuning the Operating System and Platform, Server Scaling, Processors

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Tuning the Operating System and Platform

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 Tuning the Operating System and Platform, Processors, “Server Scaling” on page

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 Performance Tuning Roadmap Tuning 64-bit Systems for Performance BenchmarkingTables Page Examples Heap Configuration on SolarisHeap 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 BrowserUser Authentication and Authorization Security RequirementsEncryption Hardware Resources General Tuning Concepts AdministrationAdministration 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 HandlingConfiguration and Deployment Tips Disable Security ManagerOptimize 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 General Guidelines Use High Performance BeansUse 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 To enable request partitioning 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 ServerCheckpoint only when needed Stateless Session BeansRead-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 ConnectionsTuning Message-Driven Beans Use getConnectionTune 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 QueueRequest Timeout Thread CountInitial Thread Count Keep Alive Buffer LengthMax Connections HTTP Protocol DNS Lookup EnabledHTTP File Cache Time OutHash Init Size Max Files CountMax Age Small/Medium File Size and File Size LimitTuning HTTP Listener Settings Network AddressAcceptor Threads Overview ORB SettingsHow a Client Connects to the ORB Monitoring the ORBTuning the ORB Connection StatisticsThread Pools ORB Thread Pool Parameters Tunable ORB ParametersUsing 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 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 BenchmarkingDisk Configuration Network 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 InternalLogbufferSizeTuning NumberOfLocks Calculating the number of locksSummary Timeouts JDBC connection pool timeoutsLoad Balancer timeouts Operating System Configuration Tuning the Enterprise Server for High-AvailabilityHADB timeouts “Tuning Session Persistence Frequency” on pageTuning Session Persistence Frequency Web-methodTime-based Session Size Session Persistence Scopesession modified-sessionCheckpointing Stateful Session Beans Configuring the JDBC Connection PoolConfiguring the Load Balancer Enabling the Health CheckerConnection Pools” on page health-checker Page caching Continued servlet results, 31 capacity planning IndexPage Page monitoring Continued transaction service Page Sun GlassFish Enterprise Server 2.1 Performance Tuning Guide January x86 XA-capable data sources, 38-39 -Xms Xmx, 88Index