[Freeswitch-users] config ramdisk on CentOS 5.5

[fieldpeak]

i'm trying tuning the FS to max performance on centos 5.5, and referred to
http://wiki.freeswitch.org/wiki/Performance_testing_and_configurations#FreeSWITCH.27s_core.db_I.2FO_bottleneck

#1,  i configure the DB of FS to ramdisk ,

when i run "tmpfs /opt/freeswitch/db tmpfs defaults 0 0", it output: "-bash:
tmpfs: command not found"

#2,  i run "ethtool -g eth0", the output is below, what value i should
config for RX and TX for max performance...
Ring parameters for eth0:
Pre-set maximums:
RX:             4096
RX Mini:        0
RX Jumbo:       0
TX:             4096
Current hardware settings:
RX:             256
RX Mini:        0
RX Jumbo:       0
TX:             256

Apprecited if anyone help how to configure it... thanks!

Regards,
Charles
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