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fix: update QueryNode NumEntities metrics when collection has no segments (#45147)

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Related to #44509

Fix a bug where QueryNodeNumEntities metrics were not updated for
collections with zero segments, causing stale metrics when all segments
are flushed or compacted.

The previous implementation used separate loops: one to update size
metrics for all collections, and another to update num entities metrics
only for collections present in the grouped segments map. Collections
with no segments were skipped in the second loop, leaving their
NumEntities metrics stale.

Changes:
- Consolidate size and num entities metric updates into single loop
- Iterate over all collections instead of grouped segments
- Get collection metadata from manager instead of segment instances
- Correctly set NumEntities to 0 for collections with no segments
- Apply the same fix to both growing and sealed segment processing
- Add nil check for collection metadata before processing

This ensures all collection metrics are updated consistently, even when
segment count drops to zero.

Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
This commit is contained in:
congqixia 2025-10-30 10:12:08 +08:00 committed by GitHub
parent 6e5189fe19
commit 8c98adfeb3
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GPG Key ID: B5690EEEBB952194
1 changed files with 18 additions and 15 deletions
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33
internal/querynodev2/metrics_info.go
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@ -82,7 +82,11 @@ func getQuotaMetrics(node *QueryNode) (*metricsinfo.QueryNodeQuotaMetrics, error
growingGroupByCollection := lo.GroupBy(growingSegments, func(seg segments.Segment) int64 {
return seg.Collection()
})
for collection := range collections {
for collection, name := range collections {
coll := node.manager.Collection.Get(collection)
if coll == nil {
continue
}
segs := growingGroupByCollection[collection]
size := lo.SumBy(segs, func(seg segments.Segment) int64 {
return seg.MemSize()
@ -90,18 +94,16 @@ func getQuotaMetrics(node *QueryNode) (*metricsinfo.QueryNodeQuotaMetrics, error
totalGrowingSize += size
metrics.QueryNodeEntitiesSize.WithLabelValues(nodeID, fmt.Sprint(collection),
segments.SegmentTypeGrowing.String()).Set(float64(size))
}
for _, segs := range growingGroupByCollection {
numEntities := lo.SumBy(segs, func(seg segments.Segment) int64 {
return seg.RowNum()
})
segment := segs[0]
metrics.QueryNodeNumEntities.WithLabelValues(
segment.DatabaseName(),
collections[segment.Collection()],
coll.GetDBName(),
name,
nodeID,
fmt.Sprint(segment.Collection()),
fmt.Sprint(collection),
segments.SegmentTypeGrowing.String(),
).Set(float64(numEntities))
}
@ -110,25 +112,26 @@ func getQuotaMetrics(node *QueryNode) (*metricsinfo.QueryNodeQuotaMetrics, error
sealedGroupByCollection := lo.GroupBy(sealedSegments, func(seg segments.Segment) int64 {
return seg.Collection()
})
for collection := range collections {
for collection, name := range collections {
coll := node.manager.Collection.Get(collection)
if coll == nil {
continue
}
segs := sealedGroupByCollection[collection]
size := lo.SumBy(segs, func(seg segments.Segment) int64 {
return seg.MemSize()
})
metrics.QueryNodeEntitiesSize.WithLabelValues(fmt.Sprint(node.GetNodeID()),
fmt.Sprint(collection), segments.SegmentTypeSealed.String()).Set(float64(size))
}
for _, segs := range sealedGroupByCollection {
numEntities := lo.SumBy(segs, func(seg segments.Segment) int64 {
return seg.RowNum()
})
segment := segs[0]
metrics.QueryNodeNumEntities.WithLabelValues(
segment.DatabaseName(),
collections[segment.Collection()],
coll.GetDBName(),
name,
nodeID,
fmt.Sprint(segment.Collection()),
fmt.Sprint(collection),
segments.SegmentTypeSealed.String(),
).Set(float64(numEntities))
}