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I need help with somebody who has used RPN fields for
RRDDataSource. Under Devices/PerfConf/ethernetCsmacd I am trying to create
more meaningful graphs by using RPN fields within RRDDataSource. The issue I
have is how CDEF or VDEF variables are referenced within the RPN stack
_expression_. As an example to compute input error percentage on a port I
did the following 1. RRD data
source ifInErrors had the following in the RPN field CDEF:input_errors=ifInErrors 2. RRD data
source ifInUcastPkts had the following in the RPN field CDEF:input_packets=ifInUcastPkts 3. Created a
new RRD data source (INPUT_ERRORS) with no OID but with the following in the
RPN field
CDEF:input_errors,input_packets,DIV 4. Created
graph for INPUT_ERRORS In the above example I get no graph ..... do I have to use
or reference things differently within the RPN field? The admin guide makes no
mention about this feature. Any help would be much appriciated. |
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