record: increase SyncConcurrency #2764
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Increase record.SyncConcurrency to 4096 to allow additional concurrency within the commit pipeline. In workloads with heavy writes and high concurrency, we've observed semaphore queueing artifically increasing tail latencies.
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sumeerbhola
approved these changes
Jul 24, 2023
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Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status:complete! all files reviewed, all discussions resolved (waiting on @jbowens)
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TFTR! |
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Increase record.SyncConcurrency to 4096 to allow additional concurrency within the commit pipeline. In workloads with heavy writes and high concurrency, we've observed semaphore queueing artificially increasing tail latencies.
Here's a graph of a kv0 workload with 2KiB writes. Before ~16:00 cockroach was running with just #2762, and after was running with #2762 and this commit: