How does the Node Polling Interval affect data granularity and system load in NPM?

How does the Node Polling Interval affect data granularity and system load in NPM?

• A. Shorter poll intervals yield more granular data but do not affect system load.
• B. Longer intervals always increase data resolution.
• C. Shorter intervals yield more granular data but higher load; longer intervals reduce load but may miss short spikes.
• D. Polling interval has no impact on system load.

Answer: (C)

The main idea here is understanding the trade-off between how often you poll a node and what that means for data detail versus system burden. Polling more frequently gives you data points at a finer pace, so the data becomes more granular and you can spot short-lived spikes or rapid changes. But this also means more work for the polling engine: more CPU use, more memory and storage for the extra data, and more network traffic to collect and transmit those frequent measurements. In contrast, polling less often reduces the load because there are fewer polls and fewer data writes, but you sacrifice granularity and may miss brief spikes that happen between polls. So the best description is that shorter intervals yield more granular data but higher load, while longer intervals reduce load but may miss short spikes. The other statements don’t fit this behavior: increasing interval doesn’t improve resolution, polling interval does impact system load, and shorter intervals do affect load.

The main idea here is understanding the trade-off between how often you poll a node and what that means for data detail versus system burden. Polling more frequently gives you data points at a finer pace, so the data becomes more granular and you can spot short-lived spikes or rapid changes. But this also means more work for the polling engine: more CPU use, more memory and storage for the extra data, and more network traffic to collect and transmit those frequent measurements. In contrast, polling less often reduces the load because there are fewer polls and fewer data writes, but you sacrifice granularity and may miss brief spikes that happen between polls. So the best description is that shorter intervals yield more granular data but higher load, while longer intervals reduce load but may miss short spikes. The other statements don’t fit this behavior: increasing interval doesn’t improve resolution, polling interval does impact system load, and shorter intervals do affect load.