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fix calculateTeamStorageQueueThreshold (#11196)

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Zhe Wang 2024-02-12 16:19:33 -08:00 committed by GitHub
parent b699a7e4f7
commit 9c795c5f52
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1 changed files with 4 additions and 1 deletions
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5
fdbserver/DDTeamCollection.actor.cpp
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@ -199,6 +199,9 @@ public:
// portion of teams that have longer storage queues
// A team storage queue size is defined as the longest storage queue size among all SSes of the team
static int64_t calculateTeamStorageQueueThreshold(const std::vector<Reference<TCTeamInfo>>& teams) {
if (teams.size() == 0) {
return std::numeric_limits<int64_t>::max(); // disable this funcationality
}
std::vector<int64_t> queueLengthList;
for (const auto& team : teams) {
Optional<int64_t> storageQueueSize = team->getLongestStorageQueueSize();
@ -210,7 +213,7 @@ public:
}
}
double percentile = std::max(0.0, std::min(SERVER_KNOBS->DD_LONG_STORAGE_QUEUE_TEAM_MAJORITY_PERCENTILE, 1.0));
int position = queueLengthList.size() * (1 - percentile);
int position = (queueLengthList.size() - 1) * (1 - percentile);
std::nth_element(queueLengthList.begin(), queueLengthList.begin() + position, queueLengthList.end());
int64_t threshold = queueLengthList[position];
TraceEvent(SevInfo, "StorageQueueAwareGotThreshold").suppressFor(5.0).detail("Threshold", threshold);