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Type: Task
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Resolution: Fixed
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Priority: Major - P3
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Affects Version/s: None
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Component/s: None
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Atlas Streams
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Fully Compatible
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Sprint 45, Sprint 48, Sprint 49
There have two internal reports so far of slow $merge performance.
1. Joe did some testing in https://mongodb.slack.com/archives/C04AH2TF7E1/p1708440672869589 of a pipeline that reads data from kafka $source into a mongoDB $merge.
with an Atlas M30 unsharded target, the update rate we achieve is only 500 per second, for a 20kB doc... only 10MB per second of write throughput.
2. Devika also saw slow performance for an M30->M30 [$source, $merge] pipeline https://mongodb.slack.com/archives/C065427D6F5/p1709912805521919?thread_ts=1709759727.899969&cid=C065427D6F5
- mentioned in
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