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app/vmselect/promql: increment key prefix for faster reset for rollup result cache

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This commit is contained in:
Aliaksandr Valialkin 2021-03-22 11:57:57 +02:00
parent 648d11b8e0
commit cef010d5f7
1 changed files with 3 additions and 2 deletions
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5
app/vmselect/promql/rollup_result_cache.go
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@ -165,7 +165,7 @@ var rollupResultCacheResets = metrics.NewCounter(`vm_cache_resets_total{type="pr
// ResetRollupResultCache resets rollup result cache.
func ResetRollupResultCache() {
rollupResultCacheResets.Inc()
rollupResultCacheV.c.Reset()
atomic.AddUint64(&rollupResultCacheKeyPrefix, 1)
logger.Infof("rollupResult cache has been cleared")
}
@ -329,10 +329,11 @@ var (
var tooBigRollupResults = metrics.NewCounter("vm_too_big_rollup_results_total")
// Increment this value every time the format of the cache changes.
const rollupResultCacheVersion = 7
const rollupResultCacheVersion = 8
func marshalRollupResultCacheKey(dst []byte, expr metricsql.Expr, window, step int64, filters []storage.TagFilter) []byte {
dst = append(dst, rollupResultCacheVersion)
dst = encoding.MarshalUint64(dst, rollupResultCacheKeyPrefix)
dst = encoding.MarshalInt64(dst, window)
dst = encoding.MarshalInt64(dst, step)
dst = expr.AppendString(dst)