Tunable network parameters on AIX

Article:HOWTO64305  |  Created: 2011-12-29  |  Updated: 2012-01-12  |  Article URL http://www.symantec.com/docs/HOWTO64305
Article Type
How To

Product(s)

Environment

Subject


Tunable network parameters on AIX

You can tune the following AIX network parameters to resolve some or all of your network issues:

rfc1323

Enables the TCP window scaling option.

tcp_nodelayack

Enables TCP to send an immediate acknowledgement instead of waiting the default 200 ms delay.

tcprexmtthresh

Specifies how many consecutive duplicate ACK's are allowed before a TCP connection goes to fast retransmit phase. The default value is 3.

sb_max

Specifies the upper limit on the number of socket buffers queued to an individual socket. This value controls how much buffer space is used by buffers that are queued to a sender's socket or to a receiver's socket.

tcp_sendspace

Specifies how much data the sending application can buffer in the kernel before the application is blocked on a send call.

tcp_recvspace

Specifies how many bytes of data the receiving system can buffer in the kernel on the receiving sockets queue.

udp_recvspace

Specifies the amount of space for incoming data that is queued on each UDP socket. Any packets received beyond the specified value are discarded.

You can tune these parameters by using the no command.

See the no manual page.

See Example of tuning the TCP protocol to improve replication performance on AIX

See Tuning the operating system network parameters


Legacy ID



v68390572_v69081455


Article URL http://www.symantec.com/docs/HOWTO64305


Terms of use for this information are found in Legal Notices