Endace DAG 3.6D, Руководство пользователя

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EDM01-14 DAG 3.6D Card User Guide
©2005 20 Version 10: May 2006
4.2 High Load Performance
, continued
Increasing
buffer size
The host PC buffer can be increased to deal with bursts of high traffic load
on the network link. By default the
dagmem
driver reserves 32MB of
memory per DAG card in the system.
For OC-12/STM-4 (622Mbps) rates and above, 128MB or more may be
required per card. To change the amount of memory reserved, edit the file
/etc/modules
. If the Endace Install CD has been used it will include this
section:
# For DAG 3.x, default 32MB/card
dagmem
#
# For DAG 4.x or 6.x, use more memory per card, E.G.
# dagmem dsize=128m
The option
dsize
sets the amount of memory used per DAG card in the
system. The value of
dsize
multiplied by the number of DAG cards must
be less than the amount of physical memory installed, and must be less
than 890MB.