The Solaris Tunable Parameters Reference Manual provides reference information about Solaris OS kernel and network tunable parameters. This manual does not provide tunable parameter information about the CDE, GNOME, or Java environments.This manual contains information for both SPARC based and x86 based systems.This Solaris release supports systems that use the SPARC and x86 families of processor architectures: UltraSPARC, SPARC64, AMD64, Pentium, and Xeon EM64T. The supported systems appear in the Solaris 10 Hardware Compatibility List at http://www.sun.com/bigadmin/hcl. This document cites any implementation differences between the platform types.In this document these x86 terms mean the following:“x86” refers to the larger family of 64-bit and 32-bit x86 compatible products. “x64” points out specific 64-bit information about AMD64 or EM64T systems. “32-bit x86” points out specific 32-bit information about x86 based systems. For supported systems, see Solaris 10 Hardware Compatibility List at http://www.sun.com/bigadmin/hcl. This book is intended for experienced Solaris system administrators who might need to change kernel tunable parameters in certain situations. For guidelines on changing Solaris tunable parameters, refer to Tuning a Solaris System. The following table describes the chapters and appendixes in this book.Chapter Description Chapter 1, Overview of Solaris System Tuning An overview of tuning a Solaris system. Also provides a description of the format used in the book to describe the kernel tunables. Chapter 2, Solaris Kernel Tunable Parameters A description of Solaris kernel tunables such as kernel memory, file system, process size, and paging parameters. Chapter 3, NFS Tunable Parameters A description of NFS tunables such as caching symbolic links, dynamic retransmission, and RPC security parameters. Chapter 4, Internet Protocol Suite Tunable Parameters A description of TCP/IP tunables such as IP forwarding, source routing, and buffer-sizing parameters. Chapter 5, Network Cache and Accelerator Tunable Parameters A description of tunable parameters for the Network Cache and Accelerator (NCA). Chapter 6, System Facility Parameters A description of parameters used to set default values of certain system facilities. Changes are made by modifying files in the /etc/default directory. Appendix A, Tunable Parameters Change History A history of parameters that have changed or are now obsolete. Appendix B, Revision History for This Manual A history of this manual's revisions including the current Solaris release. This table describes other resources for Solaris tuning information.Tuning Resource For More Information Performance tuning classes http://suned.sun.com Online performance tuning information http://www.solarisinternals.com/si/index.php Ordering performance tuning documentation by Sun Microsystems Press http://www.sun.com/books/blueprints.series.html &sundocs;&typeconv;