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Sun Microsystems 820434310 manual Network Interface, Disk I/O Settings, TCP/IP Settings

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Tuning for Linux platforms

Network Interface

To ensure that the network interface is operating in full duplex mode, add the following entry into /etc/rc.local:

mii-tool -F 100baseTx-FD eth0

where eth0 is the name of the network interface card (NIC).

Disk I/O Settings

▼To tune disk I/O performance for non SCSI disks

1Test the disk speed.

Use this command:

/sbin/hdparm -t /dev/hdX

2Enable direct memory access (DMA).

Use this command:

/sbin/hdparm -d1 /dev/hdX

3Check the speed again using the hdparm command.

Given that DMA is not enabled by default, the transfer rate might have improved considerably. In order to do this at every reboot, add the /sbin/hdparm -d1 /dev/hdX line to /etc/conf.d/local.start, /etc/init.d/rc.local, or whatever the startup script is called.

For information on SCSI disks, see: System Tuning for Linux Servers — SCSI.

TCP/IP Settings

▼To tune the TCP/IP settings

1Add the following entry to /etc/rc.local

echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout

echo 60000 > /proc/sys/net/ipv4/tcp_keepalive_time echo 15000 > /proc/sys/net/ipv4/tcp_keepalive_intvl echo 0 > /proc/sys/net/ipv4/tcp_window_scaling

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

Image 102

Sun Microsystems 820434310 manual Network Interface, Disk I/O Settings, TCP/IP Settings, To tune the TCP/IP settings

Contents

Sun GlassFish Enterprise Server 2.1 Performance Tuning Guide Sun Microsystems, Inc 4150 Network Circle Santa Clara, CA U.S.AThis distribution may include materials developed by third parties Contents Tuning Tips for Specific Types of EJB Components Java Virtual Machine Settings ContentsThread Pool Settings Solaris 10 Platform-Specific Tuning Information6 Tuning for High-Availability Figures Java EE Application ModelPage Performance Tuning Roadmap Tuning 64-bit Systems for Performance BenchmarkingTables Page Examples Heap Configuration on SolarisHeap Configuration on Windows Page Preface Sun GlassFish Enterprise Server Documentation SetTABLE P-1 Books in the Enterprise Server Documentation Set Default Paths and File NamesTABLE P-2 Default Paths and File Names ContinuedThe following table explains symbols that might be used in this book Symbol ConventionsTypographic Conventions Symbol ConventionsSun Welcomes Your Comments Documentation, Support, and TrainingThird-Party Web Site References Indicates menu itemProcess Overview Tuning“General Tuning Concepts” on page “Further Information” on page “Process Overview” on pagePerformance Tuning Sequence Performance Tuning Roadmap“Application Architecture” on page “Security Requirements” on page Understanding Operational RequirementsApplication Architecture “Hardware Resources” on pageServer-Side Enterprise Business Logic Information System Client-Side PresentationServer-Side Presentation BrowserUser Authentication and Authorization Security RequirementsEncryption Hardware Resources General Tuning Concepts AdministrationAdministration Guide Capacity Planning 1 Determine performance on a single CPU User ExpectationsTo Determine Capacity 2 Determine vertical scalabilityFurther Information Further Information“EJB Performance Tuning” on page Tuning Your Application“Java Server Page and Servlet Tuning” on page Java Programming GuidelinesDeclare Constants as static final Assign null to Variables That Are No Longer NeededDeclare Methods as final Only If Necessary Avoid FinalizersDeclare Method Arguments final Java Server Page and Servlet TuningSynchronize Only When Necessary Use DataHandlers for SOAP AttachmentsAvoid Shared Modified Class Variables Suggested Coding PracticesGeneral Guidelines HTTP Session HandlingConfiguration and Deployment Tips Disable Security ManagerOptimize SSL “Using Special Techniques” on page EJB Performance Tuning“Using Local and Remote Interfaces” 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 Use the Appropriate Stubs Using Local and Remote InterfacesCache and Pool Tuning Tips Remove Unneeded Stateful Session BeansUsing Pass-By-Reference Semantics Prefer Local InterfacesUse Container-Managed Transactions Use XA-Capable Data Sources Only When NeededImproving Performance of EJB Transactions Don’t Encompass User Input TimeUse the Least Expensive Transaction Attribute Using Special TechniquesConfigure JDBC Resources as One-Phase Commit Resources 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 Stateful Session Beans Tuning Tips for Specific Types of EJB ComponentsEntity Beans 4 Restart the Application ServerCheckpoint only when needed Stateless Session BeansRead-Only Entity Beans Pre-fetching Container Managed Relationship CMR Beans Refresh periodThis clause indicates an outer join. These OrderLines are pre-fetched Encapsulate Business Logic in Entity EJB Components JDBC and Database AccessUse JDBC Directly Close ConnectionsTuning Message-Driven Beans Use getConnectionTune the Message-Driven Bean’s Pool Size Cache Bean-Specific Resources Limit Use of JMS Connections“Deployment Settings” on page “Logger Settings” on page Tuning the Enterprise ServerDeployment Settings “Web Container Settings” on page “EJB Container Settings” on pageDisable Dynamic Application Reloading Logger SettingsDisable Auto-deployment Use Pre-compiled JavaServer PagesSession Properties Session Timeout Web Container SettingsGeneral Settings “Session Properties Session Timeout” on pageDisable Dynamic JSP Reloading Manager Properties Reap IntervalMonitoring the EJB Container EJB Container SettingsTuning the EJB Container Overview of EJB Pooling and CachingTuning the EJB Pool EJB Pool SettingsTuning the EJB Cache EJB Cache SettingsTimeout Pool and Cache Settings for Individual EJB ComponentsRemoval Timeout Max Cache SizeCommit Option Determining the best commit optionMonitoring the Transaction Service Java Message Service SettingsTransaction Service Settings Viewing Monitoring InformationTuning the Transaction Service Disable Distributed Transaction LoggingRecover On Restart Automatic Recovery HTTP Service SettingsMonitoring the HTTP Service “Monitoring the HTTP Service” on pageCacheEntries CurrentCacheEntries / MaxCacheEntries EnabledDNS Cache Information dns “DNS Cache Information dns” on pageLimit DNS Lookups to Asynchronous HitRatioCaching DNS Entries NameLookupsFile Cache Information file-cache Keep Alive keep-alive“Access Log” on page “Request Processing” on page Tuning the HTTP ServiceAccess Log Connection QueueRequest Timeout Thread CountInitial Thread Count Keep Alive Buffer LengthMax Connections HTTP File Cache DNS Lookup EnabledHTTP Protocol Time OutMax Age Max Files CountHash Init Size Small/Medium File Size and File Size LimitTuning HTTP Listener Settings Network AddressAcceptor Threads How a Client Connects to the ORB ORB SettingsOverview Monitoring the ORBTuning the ORB Connection StatisticsThread Pools Tunable ORB Parameters ORB Thread Pool 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 To Enable Java Serialization Thread Pool SettingsTuning Thread Pools Unix /Linux only Using JSG for Application Clients“Pool Size Settings” on page JDBC Connection Pool SettingsTuning JDBC Connection Pools Resources“Timeout Settings” on page Pool Size SettingsTimeout Settings “Isolation Level Settings” on pageIsolation Level Settings Connection Validation SettingsConnector Connection Pool Settings Transaction Supportconnectiondefinition javax.sql.DataSource asadmin create-connector-connection-pool --raname jdbcraChapter 3 Tuning the Enterprise Server transactionsupport LocalTransaction TESTPOOLPage “Java Virtual Machine Settings” on page Tuning the Java Runtime SystemJava Virtual Machine Settings “Managing Memory and Garbage Collection” on page“Tuning the Java Heap” on page “Rebasing DLLs on Windows” on page Tuning the Garbage Collector“Other Garbage Collector Settings” on page Managing Memory and Garbage Collection3 Configure the CMS collector in the server instance 1 Make sure that the system is not using 100 percent of its CPU2 Configure HADB timeouts, as described in the Administration Guide Choosing the Garbage Collection AlgorithmOther Garbage Collector Settings Tracing Garbage CollectionGuidelines for Java Heap Sizing Tuning the Java Heap“Heap Tuning Parameters” on page “Guidelines for Java Heap Sizing” on pageHeap Tuning Parameters Xmsvalue XmxvalueRebasing DLLs on Windows Survivor Ratio Sizing5 Restart the Application Server 1 Make installdir\ bin the default directory. cd installdir\binTo rebase the Application Server’s DLLs Example 4-2 Heap Configuration on WindowsPerformance Documentation for the Java HotSpot VM Frequently Asked Questions About the Java HotSpot Virtual MachineJava HotSpot VM Options Java performance web pagePage “Tuning for the Solaris OS” on page “Linux Configuration” on page Tuning the Operating System and Platform“Solaris 10 Platform-Specific Tuning Information” on page “Tuning for Solaris on x86” on pageNetworking MemoryDisk Space Npeakr / tTuning Parameters Solaris 10 Platform-Specific Tuning InformationTuning for the Solaris OS “Tuning Parameters” on page “File Descriptor Setting” on pageSizing the Connection Hash Table on pageLinux Configuration File Descriptor SettingTuning for Solaris on “File Descriptors” on page “IP Stack Settings” on pageIP Stack Settings File Descriptors“TCP/IP Settings” on page Tuning for Linux platforms“Network Interface” on page “Disk I/O Settings” on page “File Descriptors” on page “Virtual Memory” on pageVirtual Memory To tune the TCP/IP settings Disk I/O SettingsTCP/IP Settings 2 Enable direct memory access DMA4 Reboot the system Tuning UltraSPARC T1-Based SystemsTuning Operating System and TCP Settings 2 Add the following to /etc/sysctl.confTABLE 5-2 Tuning 64-bit Systems for Performance Benchmarking Note that the IPGE driver version isDisk Configuration Network ConfigurationStart Options LDPRELOAD32=/usr/lib/mpss.so.1 export LDPRELOAD32 export MPSSHEAP=4M “Tuning HADB” on page Tuning for High-AvailabilityTuning HADB “Tuning the Enterprise Server for High-Availability” on pageTuning Data Device Size hadbm set TotalDatadeviceSizePerNodeMemory Allocation Placing HADB files on Physical DisksDataBufferPoolSize “Timeouts” on pagePerformance “DataBufferPoolSize” on page “LogBufferSize” on pageTuning DataBufferPoolSize LogBufferSizeTuning LogBufferSize InternalLogbufferSizeTuning InternalLogbufferSize NumberOfLocksTuning NumberOfLocks Calculating the number of locksSummary Timeouts JDBC connection pool timeoutsLoad Balancer timeouts HADB timeouts Tuning the Enterprise Server for High-AvailabilityOperating System Configuration “Tuning Session Persistence Frequency” on pageTuning Session Persistence Frequency Web-methodTime-based session Session Persistence ScopeSession Size modified-sessionConfiguring the JDBC Connection Pool Checkpointing Stateful Session BeansConfiguring the Load Balancer Enabling the Health CheckerConnection Pools” on page health-checker Page Index caching Continued servlet results, 31 capacity planningPage 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