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chore: Add safety check to CometBuffer #1050
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chore: Add safety check to CometBuffer
viirya cdc8f10
Add CometColumnarToRowExec
viirya a7e95b4
fix
viirya bbd6b3f
fix
viirya 68e02e0
more
viirya 6e35d24
Update plan stability results
viirya 0418e1d
fix
viirya a0d3606
fix
viirya 9bad173
fix
viirya d527ad1
Revert "fix"
viirya 82eaf41
Revert "Revert "fix""
viirya e56164e
fix BucketedReadWithoutHiveSupportSuite
viirya 784173d
fix SparkPlanSuite
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I don't know how much performance gain we got from reusing
CometVector
here. Note that it doesn't skip loading data into buffer in native side. It just reuses JVMCometVector
.This reuse conflicts safety check. Because in CometColumnarToRow, we close columnar vectors to remove buffer reference in JVM after accessing them.
loadVector
is called after that to load next columnar vector (i.e.,CometVector
). As it is closed, we cannot reuse it now.There was a problem hiding this comment.
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Even though the conditions for reuse are extremely well documented here, it is still confusing to keep track of memory while debugging. I seem to remember that there was some gain from the memory reuse, but if more recent benchmarks show no gain, should we remove this reuse (and simplify management of our buffer lifetimes)?
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This needs to be removed. As I explained above early, without removing it, we cannot close columnar vectors in
CometColumnarToRow
and it is required to pass safety check.