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Oracle Solaris 11.1 Tunable Parameters Reference Manual Oracle Solaris 11.1 Information Library |
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Oracle Solaris 11.1 Tunable Parameters Reference Manual Oracle Solaris 11.1 Information Library |
1. Overview of Oracle Solaris System Tuning
2. Oracle Solaris Kernel Tunable Parameters
3. Oracle Solaris ZFS Tunable Parameters
5. Internet Protocol Suite Tunable Parameters
Where to Find Tunable Parameter Information
Overview of Tuning IP Suite Parameters
Internet Request for Comments (RFCs)
_icmp_err_interval and _icmp_err_burst
_respond_to_echo_broadcast and _respond_to_echo_multicast (ipv4 or ipv6)
_send_redirects (ipv4 or ipv6)
IP Tunable Parameters With Additional Cautions
_icmp_return_data_bytes (ipv4 or ipv6)
TCP/IP Parameters Set in the /etc/system File
TCP Parameters With Additional Cautions
A. Tunable Parameters Change History
Defines the default send buffer size for a UDP socket. For more information, see max_buf.
57,344 bytes
1,024 to the current value of max_buf
Yes
Note that an application can use setsockopt(3XNET) SO_SNDBUF to change the size for an individual socket. In general, you do not need to change the default value.
Unstable
For information, see UDP Parameter Name Changes (Oracle Solaris 11).
Defines the default receive buffer size for a UDP socket. For more information, see max_buf.
57,344 bytes
128 to the current value of max_buf
Yes
Note that an application can use setsockopt(3XNET) SO_RCVBUF to change the size for an individual socket. In general, you do not need to change the default value.
Unstable
For information, see UDP Parameter Name Changes (Oracle Solaris 11).
Defines the maximum send and receive buffer size for a UDP socket. It controls how large the send and receive buffers are set to by an application that uses getsockopt(3SOCKET).
2,097,152
65,536 to 1,073,741,824
Yes
Increase the value of this parameter to match the network link speed if associations are being made in a high-speed network environment.
Unstable
For information, see UDP Parameter Name Changes (Oracle Solaris 11).
This parameter controls the smallest port number UDP can select as an ephemeral port. An application can use an ephemeral port when it creates a connection with a specified protocol and it does not specify a port number. Ephemeral ports are not associated with a specific application. When the connection is closed, the port number can be reused by a different application.
Port number
32,768
1,024 to 65,535
Yes
When a larger ephemeral port range is required.
Unstable
For information, see [tcp,sctp,udp]_smallest_anon_port and [tcp,sctp,udp]_largest_anon_port.
This parameter controls the largest port number UDP can select as an ephemeral port. An application can use an ephemeral port when it creates a connection with a specified protocol and it does not specify a port number. Ephemeral ports are not associated with a specific application. When the connection is closed, the port number can be reused by a different application.
Port number
65,535
32,768 to 65,535
Yes
When a larger ephemeral port range is required.
Unstable
For information, see [tcp,sctp,udp]_smallest_anon_port and [tcp,sctp,udp]_largest_anon_port.
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