datomic

onetom 2025-12-09T07:36:29.840739Z

we are experiencing an undercurrent of 264 Successful Read Requests (count) / minute activity on our Datomic Cloud dashboard, even where our system is barely used. Q1. is that an expected value, caused by some keep-alive traffic? Q2. how can we gain more insights into what are those query operations?

Joe Lane 2025-12-09T15:18:14.110249Z

Can you look at the panel and tell me what the backing metric is? I suspect these are storage reads, which could be explained by indexing jobs.

Joe Lane 2025-12-09T15:18:43.021249Z

Nothing yet says to me you're receiving traffic or running queries

onetom 2025-12-09T21:39:47.337759Z

sorry, my statement was incorrect. the graph labelled as Successful Read Requests (count) is from the DynamoDB Monitor tab and 264 was the value of the Query operation. if i hover over that Query legend item on the graph, it says Metric: DynamoDB SuccessfulRequestLatency. im not sure how is that a "count", though. no metrics on the datomic primary compute group or query group dashboards seem to correlate to these ddb read requests, if they are indeed read counts. the cpu utilization on the query group is suspiciously high sometimes (~25%), for hours on end. that's something i can investigate further. thanks for the feedback, @joe.lane!