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Oracle Solaris 11.1 Tunable Parameters Reference Manual     Oracle Solaris 11.1 Information Library
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Document Information


1.  Overview of Oracle Solaris System Tuning

2.  Oracle Solaris Kernel Tunable Parameters

3.  Oracle Solaris ZFS Tunable Parameters

4.  NFS Tunable Parameters

5.  Internet Protocol Suite Tunable Parameters

6.  System Facility Parameters

A.  Tunable Parameters Change History

B.  Revision History for This Manual



The Oracle Solaris 11.1 Tunable Parameters Reference Manual provides reference information about Oracle Solaris OS kernel and network tunable parameters. This manual does not provide tunable parameter information about desktop systems or Java environments.

This manual contains information for both SPARC based and x86 based systems.

Note - This Oracle Solaris release supports systems that use the SPARC and x86 families of processor architectures. The supported systems appear in the Oracle Solaris Hardware Compatibility List at This document cites any implementation differences between the platform types.

Who Should Use This Book

This book is intended for experienced Oracle Solaris system administrators who might need to change kernel tunable parameters in certain situations. For guidelines on changing Oracle Solaris tunable parameters, refer to Tuning an Oracle Solaris System.

How This Book Is Organized

The following table describes the chapters and appendixes in this book.

An overview of tuning an Oracle Solaris system. Also provides a description of the format used in the book to describe the kernel tunables.
A description of Oracle Solaris kernel tunables such as kernel memory, file system, process size, and paging parameters.
A description of Oracle Solaris ZFS tunable parameters. This chapter also includes ZFS tuning information for database products.
A description of NFS tunables such as caching symbolic links, dynamic retransmission, and RPC security parameters.
A description of TCP/IP tunables such as IP forwarding, source routing, and buffer-sizing 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.
A history of parameters that have changed or are now obsolete.
A history of this manual's revisions including the current Oracle Solaris release.

Other Resources for Oracle Solaris Tuning Information

This table describes other resources for Oracle Solaris tuning information.

Tuning Resource
For More Information
In-depth technical white papers

Access to Oracle Support

Oracle customers have access to electronic support through My Oracle Support. For information, visit or visit if you are hearing impaired.

Typographic Conventions

The following table describes the typographic conventions that are used in this book.

Table P-1 Typographic Conventions

The names of commands, files, and directories, and onscreen computer output
Edit your .login file.

Use ls -a to list all files.

machine_name% you have mail.

What you type, contrasted with onscreen computer output
machine_name% su


Placeholder: replace with a real name or value
The command to remove a file is rm filename.
Book titles, new terms, and terms to be emphasized
Read Chapter 6 in the User's Guide.

A cache is a copy that is stored locally.

Do not save the file.

Note: Some emphasized items appear bold online.

Shell Prompts in Command Examples

The following table shows UNIX system prompts and superuser prompts for shells that are included in the Oracle Solaris OS. In command examples, the shell prompt indicates whether the command should be executed by a regular user or a user with privileges.

Table P-2 Shell Prompts

Bash shell, Korn shell, and Bourne shell
Bash shell, Korn shell, and Bourne shell for superuser
C shell
C shell for superuser