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Increase regen historical state cache size (#5613)

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* Increase cache size and garbage collect

* Update beacon-chain/db/kv/regen_historical_states.go

* Use const
This commit is contained in:
terence tsao 2020-04-25 07:59:29 -07:00 committed by GitHub
parent 07f6894db1
commit 5fbf38c98f
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 1 deletions
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12
beacon-chain/db/kv/regen_historical_states.go
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@ -3,6 +3,7 @@ package kv
import (
"context"
"fmt"
"runtime"
lru "github.com/hashicorp/golang-lru"
"github.com/pkg/errors"
@ -18,6 +19,11 @@ import (
"go.opencensus.io/trace"
)
// Using max possible size to avoid using DB to save and retrieve pre state (slow)
// The size is 80 because block at slot 43772 built on top of block at slot 43693.
// That is the worst case.
const historicalStatesSize = 80
func (kv *Store) regenHistoricalStates(ctx context.Context) error {
ctx, span := trace.StartSpan(ctx, "db.regenHistoricalStates")
defer span.End()
@ -56,7 +62,8 @@ func (kv *Store) regenHistoricalStates(ctx context.Context) error {
if err != nil {
return err
}
cacheState, err := lru.New(int(params.BeaconConfig().SlotsPerEpoch) * 2)
cacheState, err := lru.New(historicalStatesSize)
if err != nil {
return err
}
@ -125,6 +132,9 @@ func (kv *Store) regenHistoricalStates(ctx context.Context) error {
// Flush the cache, the cached states never be used again.
cacheState.Purge()
// Manually garbage collect as previous cache will never be used again.
runtime.GC()
return nil
}