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Add integration test for erroring when memory limits are hit #4406

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merged 2 commits into from
Nov 29, 2022

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alamb
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@alamb alamb commented Nov 28, 2022

Draft as it is waiting on:

Which issue does this PR close?

Resolves #4404

Rationale for this change

I would like end to end coverage that when run with a memory limit, queries will error (rather than exceed the memory limit)

What changes are included in this PR?

  1. Add new memory_limit test
  2. Improve error messages to make it clearer what is out of memory
  3. Refactor stagger_batch into a function

Are these changes tested?

Are there any user-facing changes?

@github-actions github-actions bot added the core Core DataFusion crate label Nov 28, 2022
@alamb alamb marked this pull request as draft November 28, 2022 18:35
"Cannot spill AggregationState".to_owned(),
))
Err(DataFusionError::ResourcesExhausted(format!(
"Cannot spill {}",
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Improved error message here

if in_mem_batches.len() == 0 {
return Ok(0);
}

debug!(
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I just moved the debug message down as it was confusing that spill didn't actually happen if in_mem_batches was empty

// use a random number generator to pick a random sized output
let mut rng = StdRng::seed_from_u64(42);
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This piece of code was copied in several places so I refactored it into stagger_batch

@alamb alamb marked this pull request as ready for review November 28, 2022 21:04
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alamb commented Nov 28, 2022

cc @crepererum and @milenkovicm

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Nice 💪

.await
}

/// 100K memory limit
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100k? How does relate to 50 and 0.95?

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@alamb alamb Nov 29, 2022

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Whoops -- the 100k is left over from a previous revision -- I will update the comment

@alamb alamb merged commit 49166ea into apache:master Nov 29, 2022
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ursabot commented Nov 29, 2022

Benchmark runs are scheduled for baseline = 66c95e7 and contender = 49166ea. 49166ea is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

@alamb alamb deleted the alamb/memory_limit_tests branch August 8, 2023 20:14
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SQL level coverage for when memory limit is exceeded
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