Is there a way to find out how many items are in the cache?

Millione · April 17, 2023, 12:37pm

I want to know roughly about how many items are in the cache, but I just can’t find the related api.

awsl-dbq · April 26, 2023, 3:31am

no public api to compute length of store.

dgraph-io/ristretto/blob/main/cache.go#L48

    
      
          
          
type itemCallback func(*Item)
          
          
const itemSize = int64(unsafe.Sizeof(storeItem{}))
          
          
// Cache is a thread-safe implementation of a hashmap with a TinyLFU admission
          // policy and a Sampled LFU eviction policy. You can use the same Cache instance
          // from as many goroutines as you want.
          type Cache struct {
          	// store is the central concurrent hashmap where key-value items are stored.
          	store store
          	// policy determines what gets let in to the cache and what gets kicked out.
          	policy policy
          	// getBuf is a custom ring buffer implementation that gets pushed to when
          	// keys are read.
          	getBuf *ringBuffer
          	// setBuf is a buffer allowing us to batch/drop Sets during times of high
          	// contention.
          	setBuf chan *Item
          	// onEvict is called for item evictions.
          	onEvict itemCallback

github.com

dgraph-io/ristretto/blob/main/store.go

/*
 * Copyright 2019 Dgraph Labs, Inc. and Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ristretto

import (
	"sync"

This file has been truncated. show original

maybe you fork the code and add it by yourself.

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Is there a way to find out how many items are in the cache?

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