How much memory does Prometheus need at least?

[UnicornSymbol]

When I use 4G memory to run, prometheus2.0 memory usage has been increasing until it dies.

`- "--config.file=/etc/prometheus/prometheus.yml"

• "--storage.tsdb.path=/prometheus"
• "--storage.tsdb.retention=6h"
• "--storage.tsdb.max-block-duration=1h"
• "--web.enable-lifecycle"`

[kdada]

In our case, a prometheus instance with about 200 targets and 5 seconds of scrape interval, uses 4G ~ 5G memory.

What's scale of your prometheus?

[UnicornSymbol]

No more than 100 and 30 seconds scrape interval, Why memory usage has been increasing.

[kdada]

Do you have some queries/alerts/rules which fetch too many metrics?

[UnicornSymbol]

I use Prometheus to collect data and grafana to display.I'm not sure is grafana showing too many queries.Do you use grafana?

[kdada]

We use grafana too. Our dashboards shows metrics about 30min~6h. That means grafana will query data in the past 6h at most.

[UnicornSymbol]

Thank you for your answer.I'll try to adjust.

[simonpasquier]

Thanks for your report. It looks as if this is actually a question about usage and not development. BTW You shouldn't need to tweak the storage.tsdb.max-block-duration flag, it is only required for testing and benchmarking.

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