adarshsanjeev commented on code in PR #13846:
URL: https://github.com/apache/druid/pull/13846#discussion_r1118536860
##########
extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/exec/WorkerMemoryParameters.java:
##########
@@ -439,11 +494,19 @@ private static long memoryNeededForInputChannels(final
int numInputWorkers)
}
/**
- * Amount of heap memory available for our usage.
+ * Amount of heap memory available for our usage. Any computation changes
done to this method should also be done in its corresponding method {@link
WorkerMemoryParameters#estimateTotalMemoryInJvmFromUsableMemory}
+ */
+ private static long computeUsableMemoryInJvm(final long maxMemory, final
long totalLookupFootprint)
+ {
+ return (long) ((maxMemory - totalLookupFootprint) *
USABLE_MEMORY_FRACTION);
+ }
+
+ /**
+ * Estimate amount of heap memory to use in case usable memory is provided.
This method is used for bettter exception messages when {@link
NotEnoughMemoryFault} is thrown.
Review Comment:
Nit: better
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