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Oracle Solaris Tunable Parameters Reference Manual     Oracle Solaris 10 1/13 Information Library
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1.  Overview of Oracle Solaris System Tuning

What's New in Oracle Solaris System Tuning?

Oracle Solaris System Tuning in the Solaris 10 Release

Default Stack Size

System V IPC Configuration

NFSv4 Parameters

New and Changed TCP/IP Parameters

IP Forwarding Changes

SPARC: Translation Storage Buffer (TSB) Parameters

SCTP Tunable Parameters

Tuning an Oracle Solaris System

Tuning Format of Tunable Parameters Descriptions

Tuning the Oracle Solaris Kernel

/etc/system File

Example-Setting a Parameter in /etc/system

Recovering From an Incorrect Value

kmdb Command

mdb Command

Example-Using mdb to Display Information

Special Oracle Solaris tune and var Structures

Viewing Oracle Solaris System Configuration Information

sysdef Command

kstat Utility

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


Special Oracle Solaris tune and var Structures

Oracle Solaris tunable parameters come in a variety of forms. The tune structure defined in the/usr/include/sys/tuneable.h file is the runtime representation of tune_t_fsflushr, tune_t_minarmem, and tune_t_flkrec. After the kernel is initialized, all references to these variables are found in the appropriate field of the tune structure.

The proper way to set parameters for this structure at boot time is to initialize the special parameter that corresponds to the desired field name. The system initialization process then loads these values into the tune structure.

A second structure into which various tunable parameters are placed is the var structure named v. You can find the definition of a var structure in the /usr/include/sys/var.h file. The runtime representation of variables such as autoup and bufhwm is stored here.

Do not change either the tune or v structure on a running system. Changing any field in these structures on a running system might cause the system to panic.