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License: Apache License 2.0
Memory consumption estimator for Scala/Java
License: Apache License 2.0
I'm just logging this for reference. Apache Drill uses this lib but it is a little out of date.
I have a Java port of the code in a PR for Apache Drill if anyone is interested in copying the code for their own use.
Looking at the spark repo, it looks like at least one relevant fix has been made since this code was extracted. It might be a good idea to merge it. I wonder if the spark utility can be directly used rather than propagating the fixes.
The fix: apache/spark@06b6a07
next code will over estimate size of array, for example, object A contains array B, C is one element of Bใ If C contains A, then, estimate C will get the over size.
private def visitArray(array: AnyRef, cls: Class[_], state: SearchState) {
...
for (i <- 0 until ARRAY_SAMPLE_SIZE) {
val elem = JArray.get(array, rand.nextInt(length))
size += SizeEstimator.estimate(elem, state.visited)
...
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