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lib/storage: avoid allocations of tsidPrev on every blockStreamReader.NextBlock() call

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This is a follow-up for 00b7c97d2a

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2082
This commit is contained in:
Aliaksandr Valialkin 2022-01-31 22:45:56 +02:00
parent 784cdcb080
commit 0fbfa8c245
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1 changed files with 8 additions and 3 deletions
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11
lib/storage/block_stream_reader.go
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@ -18,6 +18,11 @@ type blockStreamReader struct {
// Currently active block.
Block Block
// Contains TSID for the previous block.
// This field is needed for checking that TSIDs
// increase over time when reading blocks.
tsidPrev TSID
// Filesystem path to the stream reader.
//
// Is empty for inmemory stream readers.
@ -213,12 +218,12 @@ func (bsr *blockStreamReader) NextBlock() bool {
if bsr.err != nil {
return false
}
tsidPrev := bsr.Block.bh.TSID
bsr.tsidPrev = bsr.Block.bh.TSID
bsr.Block.Reset()
err := bsr.readBlock()
if err == nil {
if bsr.Block.bh.TSID.Less(&tsidPrev) {
bsr.err = fmt.Errorf("possible data corruption: the next TSID=%v is smaller than the previous TSID=%v", &bsr.Block.bh.TSID, &tsidPrev)
if bsr.Block.bh.TSID.Less(&bsr.tsidPrev) {
bsr.err = fmt.Errorf("possible data corruption: the next TSID=%v is smaller than the previous TSID=%v", &bsr.Block.bh.TSID, &bsr.tsidPrev)
return false
}
if bsr.Block.bh.RowsCount == 0 {