stevenzwu commented on a change in pull request #3001:
URL: https://github.com/apache/iceberg/pull/3001#discussion_r701554902
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File path: flink/src/main/java/org/apache/iceberg/flink/sink/FlinkSink.java
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@@ -249,6 +251,21 @@ public Builder uidPrefix(String newPrefix) {
return this;
}
+ /**
+ * Set the {@link SlidingWindowReservoir} size (number of measurements
stored)
+ * for the two histogram metrics of data files and delete file size
distribution.
+ *
+ * @param newReservoirSize the new histogram reservoir size for the file
size distribution.
+ * default reservoir size is 128, which only add a small memory overhead
of 1 KB (128 x 8B) per histogram.
+ * For use cases with a lot of files, a larger reservoir size can produce
more accurate histogram distribution.
+ */
+ public Builder fileSizeHistogramReservoirSize(int newReservoirSize) {
Review comment:
hardcoded the reservoir size
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