On 02/03/2021 16:43, John Dexter wrote:
Hello all,
I was thinking that if you use the same scrape-interval for many
targets, doesn't this mean every 15/30/60s your Prometheus server
sends out a huge barrage of requests all at once, potentially to many
modules on the same server?
I wondered if this can lead to any issues with network spikes and so
on, and if Prometheus allows/encourages all the various scrapes to be
staggered slightly so there is a constant stream of polls not so
'lumpy'? Maybe it naturally works this way anyway, that polls are run
sequentially rather than in parallel?
Prometheus will ensure that a specific target is scraped every 15/30/60s
as configured, but other than the period between scrapes being fixed the
exact "second past the minute" will differ between targets. So for
example if you had two targets which had a scrape interval of 60s, you
might find that the scraping happened at 10s past the minute for target
1 and 40s past the minute for target 2.
--
Stuart Clark
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