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ristretto: adjust NumCounters

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Martin Holst Swende 2019-09-27 14:12:40 +02:00
parent 3002f867fa
commit 941fa38123
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1 changed files with 5 additions and 2 deletions
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7
trie/ristretto.go
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@ -32,9 +32,12 @@ type RistrettoCache struct {
// NewRistrettoCache create a new ristretto cache with the given // NewRistrettoCache create a new ristretto cache with the given
// capacity in MB // capacity in MB
func NewRistrettoCache(capacity int) (*RistrettoCache, error) { func NewRistrettoCache(capacity int) (*RistrettoCache, error) {
maxBytes := int64(1000 * 1000 * capacity)
// Let's assume an item is around 500 bytes large
approxItems := maxBytes / 500
cache, err := ristretto.NewCache(&ristretto.Config{ cache, err := ristretto.NewCache(&ristretto.Config{
NumCounters: int64(capacity * 10), NumCounters: int64(approxItems * 10),
MaxCost: int64(1000 * 1000 * capacity), MaxCost: maxBytes,
BufferItems: 64, BufferItems: 64,
Metrics: false, Metrics: false,
KeyToHash: func(key interface{}) uint64 { KeyToHash: func(key interface{}) uint64 {