Linux tunables – Oracle Audio Technologies A86828-01 User Manual

Page 44

Advertising
background image

TCP Tuning

4-4

Oracle HTTP Server powered by Apache Performance Guide

Linux Tunables

Raising Network Limits on Linux Systems for 2.1.100 or greater

Linux only allows you to use 15 bits of the TCP window field. This means that you
have to multiply everything by 2, or recompile the kernel without this limitation.

Tuning a Running System

There is no

sysctl

application for changing kernel values. You can change the

kernel values with an editor like VI.

Tuning the Default and Maximum Size

Edit the files listed below to change kernel values.

Table 4–4

AIX TCP Parameters (using no command)

Parameter

Model

Default
Value

Recommended Value

rfc1323

/etc/rc.net

0

1

sb_max

/etc/rc.net

65,536

1,31,072

tcp_mssdflt

/etc/rc.net

512

1,024

ipqmaxlen

/etc/rc.net

50

100

tcp_sendspace

/etc/rc.net

16,384

65,536

tcp_recvspace

/etc/rc.net

16,384

65,536

xmt_que_size

/etc/rc.net

30

150

See Also:

Tuning at Compile Time

Table 4–5

Linux TCP Parameters

Filename

Details

/proc/sys/net/core/rmem_default

Default Receive Window

/proc/sys/net/core/rmem_max

Maximum Receive Window

/proc/sys/net/core/wmem_default

Default Send Window

/proc/sys/net/core/wmem_max

Maximum Send Window

Advertising