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          合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。
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                            1.過期key處理：
惰性清理：鍵過期了就過期了，不管。當讀/寫一個已經過期的key時，會觸發惰性刪除策略，直接刪除掉這個過期key
![](https://img.kancloud.cn/32/ae/32ae0fd1e044bf87a75c4ffca1affb5f_754x131.png)
定期清理：每隔一段時間，對expires字典進行抽樣檢查，刪除里面的過期鍵。
![](https://img.kancloud.cn/cd/b2/cdb2dc422a2c7ceee9ff4b7a05a7f8f9_773x365.png)
2. 內存淘汰機制：
![](https://img.kancloud.cn/62/2e/622e117f8f4f2a6e4b6045394b6c3961_825x399.png)
![](https://img.kancloud.cn/d2/58/d2587caeec452f6b444c19ffcac33276_783x403.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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