storage: use single batch find for a fetch#446
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The fetch path had two batch finds, one for the DelayedFetch.tryCompleteDiskless and seconds at DelayedFetch.onComplete. Collect the batches at tryCompleteDiskless and reuse at onComplete. This reduces the database queries to batch coordinator.
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The fetch path had two batch finds, one for the DelayedFetch.tryCompleteDiskless and seconds at DelayedFetch.onComplete.
Collect the batches at tryCompleteDiskless and reuse at onComplete. This reduces the database queries to batch coordinator.
The current code in main can have more batches at the onComplete as a new find batch query is run after the initial call at tryCompleteDiskless.
Comparisons to current main: 5875f03
On graphs the main is the left most run and right is from this PR.
Benchmark consumer fetch latency:
Find batches query time and rate:
Fetch rate:
