Table of Contents

pollingRate attribute

The pollingRate attribute allows you to slow down polling for specific SNMP columns in a table by specifying a minimum interval (in milliseconds) between polling. This attribute applies only to SNMP columns.

Content Type

unsignedInt

Parent

ColumnOption

Remarks

Use pollingRate to reduce the polling frequency for columns that change infrequently or contain large amounts of data. Set the attribute to the desired interval in milliseconds.

Important
  • The instance option must be enabled for the table.
  • When the GetNext polling method is used, all columns will still be polled, but the result will not be written to the column. Setting pollingRate has no practical effect in this case, so it is better not to use pollingRate with GetNext.
Note
  • pollingRate can only slow down polling. If set lower than or equal to the protocol timer interval, it has no effect; the column will be polled at the timer interval.
  • The column is skipped until its pollingRate interval has elapsed, ensuring that it is not polled more frequently than specified.
  • When new rows are discovered during polling, all columns for that row are polled immediately, regardless of their pollingRate.

Examples

Suppose the polling timer is set to 10 seconds. Columns without a pollingRate are polled every 10 seconds. Columns with a pollingRate greater than the timer are polled at the next matching interval.

  • Columns 5–8: Default polling (every 10 seconds)
  • Column 1: pollingRate 11,000 ms (polled every 20 seconds)
  • Column 2: pollingRate 20,000 ms (polled every 20 seconds)
  • Column 3: pollingRate 21,000 ms (polled every 30 seconds)
  • Column 4: pollingRate 30,000 ms (polled every 30 seconds)
<ArrayOptions index="0">
  <ColumnOption idx="0" pid="1001" type="snmp" options=""/>
  <ColumnOption idx="1" pid="1002" type="snmp" pollingRate="11000" options=""/>
  <ColumnOption idx="2" pid="1003" type="snmp" pollingRate="20000" options=""/>
  <ColumnOption idx="3" pid="1004" type="snmp" pollingRate="21000" options=""/>
  <ColumnOption idx="4" pid="1005" type="snmp" pollingRate="30000" options=""/>
  <ColumnOption idx="5" pid="1006" type="snmp" options=""/>
  <ColumnOption idx="6" pid="1007" type="snmp" options=""/>
  <ColumnOption idx="7" pid="1008" type="snmp" options=""/>
  <ColumnOption idx="8" pid="1009" type="snmp" options=""/>
  <ColumnOption idx="9" pid="1010" type="retrieved" options=";save"/>
</ArrayOptions>
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