xuanyuanking commented on a change in pull request #27557: [SPARK-30804][SS]
Measure and log elapsed time for "compact" operation in CompactibleFileStreamLog
URL: https://github.com/apache/spark/pull/27557#discussion_r382560001
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/CompactibleFileStreamLog.scala
##########
@@ -177,16 +178,35 @@ abstract class CompactibleFileStreamLog[T <: AnyRef :
ClassTag](
* corresponding `batchId` file. It will delete expired files as well if
enabled.
*/
private def compact(batchId: Long, logs: Array[T]): Boolean = {
- val validBatches = getValidBatchesBeforeCompactionBatch(batchId,
compactInterval)
- val allLogs = validBatches.flatMap { id =>
- super.get(id).getOrElse {
- throw new IllegalStateException(
- s"${batchIdToPath(id)} doesn't exist when compacting batch $batchId
" +
- s"(compactInterval: $compactInterval)")
- }
- } ++ logs
+ val (allLogs, loadElapsedMs) = Utils.timeTakenMs {
+ val validBatches = getValidBatchesBeforeCompactionBatch(batchId,
compactInterval)
+ validBatches.flatMap { id =>
+ super.get(id).getOrElse {
+ throw new IllegalStateException(
+ s"${batchIdToPath(id)} doesn't exist when compacting batch
$batchId " +
+ s"(compactInterval: $compactInterval)")
+ }
+ } ++ logs
+ }
+ val compactedLogs = compactLogs(allLogs)
+
// Return false as there is another writer.
- super.add(batchId, compactLogs(allLogs).toArray)
+ val (writeSucceed, writeElapsedMs) = Utils.timeTakenMs {
+ super.add(batchId, compactedLogs.toArray)
+ }
+
+ val elapsedMs = loadElapsedMs + writeElapsedMs
+ if (elapsedMs >= COMPACT_LATENCY_WARN_THRESHOLD_MS) {
+ logWarning(s"Compacting took $elapsedMs ms (load: $loadElapsedMs ms," +
Review comment:
nit: seems these two logs could combine into one?
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