Immediately pull metrics from target

[Liu Bo]

Hi guys, can I make prometheus to pull metrics from a target immediately
after add this target to config?

For now I have to wait scrape_interval after I add target to config,
it's like if I set scrape_interval to 5m then I have to wait five
minutes so that I cat query metrics from newly added target.


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Liu Bo

[Ben Kochie]

Prometheus is optimized to scrape at least every 1m. The typical scrape interval is 15s.

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[Liu Bo]

Ben Kochie <sup...@gmail.com> writes:

> Prometheus is optimized to scrape at least every 1m. The typical
> scrape interval is 15s.

Thanks, so there's no way to actively ask prometheus to pull the
target's metrics?

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Liu Bo

[Brian Candler]

AIUI, it spreads them over the scrape interval. If it didn't, then when you add a whole load of new targets, they would all be scraped simultaneously in huge regular bursts.

[Ben Kochie]

No. As Brian says, it's intentional that this is not possible in order to avoid load spikes.

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[Stuart Clark]

On 2023-03-30 12:48, Ben Kochie wrote:
> No. As Brian says, it's intentional that this is not possible in order
> to avoid load spikes.

And as Ben mentioned earlier the normal scrape intervals are usually
15/30 seconds for normal metrics, or 1/2 minutes for slower use cases.
Therefore you'd only have to wait a short amount of time before metrics
start appearing - although often you need to wait for at least a few
scrapes to be able to do things like looking at counter increase rates,
etc.

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Stuart Clark

[Bo Liu]

Sorry, forward to mail list manually.

Liu Bo <liubol...@gmail.com>于2023年3月31日 周五上午9:53写道：

Thank you guys, I got it now, that's help me a lot.

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Liu Bo