Polling SNMPv3 agents adds additional load to the eHealth system due to the overhead associated with encryption and authentication. This can cause missed polls for SNMPv3 elements and a corresponding loss of data granularity in reports.
If you are polling any SNMPv3 agents, verify that your setting for the NH_STAT_POLLS_PER_SECOND environment variable does not exceed 200 (+/- depending on the power of the eHealth polling server). This setting establishes a performance boundary of 40,000 elements polled every 5 minutes. An indication that NH_STAT_POLLS_PER_SECOND is set too high is receipt of "no response" errors, specifically from SNMPv3 agents.
NH_STAT_POLLS_PER_SECOND settings for SNMPv3 polling
Error:No response to SNMP requests
No response errors when polling SNMPv3 enabled devices
eHealth 6.0 and later
Please reference TS14552
for more information regarding setting the NH_STAT_POLLS_PER_SECOND environment variable.
This information supercedes recommendations provided in TS15045
(Legacy KB ID CNC TS34879 )