924060929 commented on code in PR #42007:
URL: https://github.com/apache/doris/pull/42007#discussion_r1804067063
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/NereidsPlanner.java:
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@@ -536,6 +543,15 @@ private PhysicalPlan chooseBestPlan(Group rootGroup,
PhysicalProperties physical
}
}
+ private long getGarbageCollectionTime() {
+ List<GarbageCollectorMXBean> gcMxBeans =
ManagementFactory.getGarbageCollectorMXBeans();
+ long initialGCTime = 0;
+ for (GarbageCollectorMXBean gcBean : gcMxBeans) {
+ initialGCTime += gcBean.getCollectionTime();
+ }
+ return initialGCTime;
+ }
Review Comment:
How long does this function usually take?
If > 10ms, we should only compute this time when
SessionVariable.enable_profile == true
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