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tsdb: reduce sleep time when reading WAL (#10859)

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The code sleeps for a short time to allow goroutines to finish, however
it seems the duration can be reduced a lot, speeding up the reading
process.

I checked using some WAL data from production, and the queue is almost
always empty at the time we enter `waitForIdle()` so there is no danger
of spinning in the tight loop.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
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Bryan Boreham 2022-06-12 07:24:11 +01:00 committed by GitHub
parent a84c472745
commit 542b9ecdbd
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tsdb/head_wal.go
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@ -438,7 +438,7 @@ func (wp *walSubsetProcessor) waitUntilIdle() {
}
wp.input <- []record.RefSample{}
for len(wp.input) != 0 {
time.Sleep(1 * time.Millisecond)
time.Sleep(10 * time.Microsecond)
select {
case <-wp.output: // Allow output side to drain to avoid deadlock.
default: