kfaraz commented on code in PR #13219:
URL: https://github.com/apache/druid/pull/13219#discussion_r994041387
##########
extensions-core/lookups-cached-global/src/main/java/org/apache/druid/data/input/MapPopulator.java:
##########
@@ -245,7 +245,8 @@ static long getByteLengthOfObject(@Nullable Object o)
{
if (null != o) {
if (o.getClass().getName().equals(STRING_CLASS_NAME)) {
- return ((String) (o)).length();
+ // Each String object has ~40 bytes of overhead
+ return ((long) ((String) (o)).length() * Character.BYTES) + 40;
Review Comment:
You could also consider doing this instead:
https://github.com/apache/druid/blob/master/processing/src/main/java/org/apache/druid/segment/StringDimensionDictionary.java#L41-L47
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