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(slightly) less random reads on journal compaction

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This commit is contained in:
Martin Sumner 2020-03-06 11:29:25 +00:00
parent 4d550ef2a1
commit 60e29f2ff0
3 changed files with 40 additions and 24 deletions
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4
src/leveled_iclerk.erl
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@ -508,6 +508,10 @@ schedule_compaction(CompactionHours, RunsPerDay, CurrentTS) ->
check_single_file(CDB, FilterFun, FilterServer, MaxSQN, SampleSize, BatchSize) ->
FN = leveled_cdb:cdb_filename(CDB),
PositionList = leveled_cdb:cdb_getpositions(CDB, SampleSize),
AvgJump =
(lists:last(PositionList) - lists:nth(1, PositionList))
div length(PositionList),
leveled_log:log("IC014", [AvgJump]),
KeySizeList = fetch_inbatches(PositionList, BatchSize, CDB, []),
Score =
size_comparison_score(KeySizeList, FilterFun, FilterServer, MaxSQN),