findingrish commented on code in PR #16676:
URL: https://github.com/apache/druid/pull/16676#discussion_r1666671138
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server/src/main/java/org/apache/druid/segment/metadata/CoordinatorSegmentMetadataCache.java:
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@@ -181,6 +220,12 @@ public void onLeaderStart()
try {
segmentSchemaBackfillQueue.onLeaderStart();
cacheExecFuture = cacheExec.submit(this::cacheExecLoop);
+ coldSchemaExecFuture = coldScehmaExec.schedule(
+ this::coldDatasourceSchemaExec,
+ coldSchemaExecPeriodMillis,
Review Comment:
> Do we have any metrics which tell us the performance of these executor
service in terms of number of cold segments back filed
We are not backfilling segment here. It is just looping over the segments,
identifying cold segment and building their schema.
If the datasource schema is updated it is logged.
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