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subcompaction: use ratio cutoff to break residue pattern #14163

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subcompaction: use ratio cutoff to break residue pattern #14163

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6 changes: 3 additions & 3 deletions db/compaction/compaction_job.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -677,13 +677,13 @@ void CompactionJob::GenSubcompactionBoundaries() {
return;
}

uint64_t next_threshold = target_range_size;
uint64_t cut_threshold = 2 * target_range_size / 5 * 4;
uint64_t cumulative_size = 0;
uint64_t num_actual_subcompactions = 1U;
for (TableReader::Anchor& anchor : all_anchors) {
cumulative_size += anchor.range_size;
if (cumulative_size > next_threshold) {
next_threshold += target_range_size;
if (cumulative_size >= cut_threshold) {
cumulative_size = 0;
num_actual_subcompactions++;
boundaries_.push_back(anchor.user_key);
}
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