Open lmatz opened 1 year ago
This issue has been open for 60 days with no activity.
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https://grafana.test.risingwave-cloud.xyz/d/EpkBw5W4k/risingwave-dev-dashboard?from=168926058[…]&var-namespace=li0k-nexmark-q16-affinity-heartbeat-2
The metric is supposed to calculate the accumulated cost, i.e. cost in total over a period of time. But it keeps fluctuating, i.e. up and down, which seems abnormal, as accumulated cost should only go up.
Per the dashboard, the cluster keeps running the query continuously and it seems no crashes and no recovery.
The purpose is to calculate the cost in addition to the pure performance metrics such as throughput, to derive the performance-cost effectiveness for Risingwave
cc: @hzxa21 @zwang28
Edit: The compactor restarted. This is likely as we adjust down the memory for compactor to 2GB. But without adjusting
max_compactor_task_multiplier
from 2 to 1/1.5, it does OOM sometimes.Edit: Probably just keep the count of operations, and leave cost calculation to the audience as the cost of different object store is different.