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[BEAM-9822] Simplify pipeline when batching is disabled. - #11529
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Grouping adds significant latency and memory use, and when streaming this causes both OOMs and high pipeline latencies.
When batching is disabled, there is no need for SpannerIO to read the schema, group, sort, batch and write batches, so simplify the pipeline to just write the mutation.
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Mostly LGTM, just one minor request
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LGTM. I'll merge when CI is green |
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Jenkins seems to be very sleepy today... |
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* Disable grouping by default when streaming. Grouping adds significant latency and memory use, and when streaming this causes both OOMs and high pipeline latencies. * Simplify pipeline when batching is disabled. When batching is disabled, there is no need for SpannerIO to read the schema, group, sort, batch and write batches, so simplify the pipeline to just write the mutation. * Fix noBatching test
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Batching is often disabled in streaming pipelines to improve latency. When this is the case, there is no
point in adding several transforms to group/sort/batch the elements, so if batching is disabled, a simple pipeline is used.
Note, this PR is dependent on PR #11528 and PR #11532
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