avg() doesn't work with range selector []

[zxwing]

I use avg() as below expression:

avg(collectd:collectd_virt_memory{virt="ca9718fac1014adeb605c9d72ae81617",type="rss",hostUuid="a456ba03d5944397b76fd8f2dbf9fceb"}[1h])

but get the error:

Error executing query: parse error at char 135: expected type vector in aggregation expression, got matrix

what is the right way to use it? The document doesn't give any example. From my understanding [] is the only range selector

[brian-brazil]

You want avg_over_time

[zxwing]

@brian-brazil I see, thanks !

[redbaron]

@zxwing, just a note - AFAIK you'll have bad time if you let metrics cardinality grow uncapped. random container names as metrics value is essentially uncapped growth

[lock]

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