Linux tunables – Oracle Audio Technologies A86828-01 User Manual
Page 44
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:
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