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tsdb: Save allocations on labels by re-using label array

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Signed-off-by: Frederic Branczyk <fbranczyk@gmail.com>
This commit is contained in:
Frederic Branczyk 2020-08-03 17:01:57 +02:00
parent ed6ce7ac98
commit e0cf219f0d
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GPG key ID: 7741A52782A90069
1 changed files with 8 additions and 4 deletions
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12
tsdb/querier.go
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@ -375,14 +375,13 @@ type blockBaseSeriesSet struct {
currLabels labels.Labels currLabels labels.Labels
bufChks []chunks.Meta bufChks []chunks.Meta
bufLbls labels.Labels
err error err error
} }
func (b *blockBaseSeriesSet) Next() bool { func (b *blockBaseSeriesSet) Next() bool {
var lbls labels.Labels
for b.p.Next() { for b.p.Next() {
if err := b.index.Series(b.p.At(), &lbls, &b.bufChks); err != nil { if err := b.index.Series(b.p.At(), &b.bufLbls, &b.bufChks); err != nil {
// Postings may be stale. Skip if no underlying series exists. // Postings may be stale. Skip if no underlying series exists.
if errors.Cause(err) == storage.ErrNotFound { if errors.Cause(err) == storage.ErrNotFound {
continue continue
@ -443,7 +442,10 @@ func (b *blockBaseSeriesSet) Next() bool {
if trimBack { if trimBack {
intervals = intervals.Add(tombstones.Interval{Mint: b.maxt + 1, Maxt: math.MaxInt64}) intervals = intervals.Add(tombstones.Interval{Mint: b.maxt + 1, Maxt: math.MaxInt64})
} }
b.currLabels = lbls
b.currLabels = make(labels.Labels, len(b.bufLbls))
copy(b.currLabels, b.bufLbls)
b.currIterFn = func() *populateWithDelGenericSeriesIterator { b.currIterFn = func() *populateWithDelGenericSeriesIterator {
return newPopulateWithDelGenericSeriesIterator(b.chunks, chks, intervals) return newPopulateWithDelGenericSeriesIterator(b.chunks, chks, intervals)
} }
@ -665,6 +667,7 @@ func newBlockSeriesSet(i IndexReader, c ChunkReader, t tombstones.Reader, p inde
p: p, p: p,
mint: mint, mint: mint,
maxt: maxt, maxt: maxt,
bufLbls: make(labels.Labels, 0, 10),
}, },
} }
} }
@ -696,6 +699,7 @@ func newBlockChunkSeriesSet(i IndexReader, c ChunkReader, t tombstones.Reader, p
p: p, p: p,
mint: mint, mint: mint,
maxt: maxt, maxt: maxt,
bufLbls: make(labels.Labels, 0, 10),
}, },
} }
} }