为什么我存储在缓存中的数据已在asp.net中删除

Question

I decided to store my data for example List of country, state, city, book and other data in cache for speed of my web site but I found that when the cache item count is 10 and Cache.EffectivePercentagePhysicalMemoryLimit is 98 I add my data to cache but other data will remove.

I set cache expiration to 20 min.how should I set size of cache? how should I do with this problem? why data I stored in cache has been removed in asp.net

in below code I have set a breakpoint the method return an empty list and when I check other data like country and state they have been removed from cache

var cahpters= CacheData.Data.Chapter.list(bookid.ToString());

Answer 1

why data i stored in cache has been removed in asp.net

Objects can be explicitly taken out of the cache when:

• Explicitly by calling Remove
• Data expiration
• Memory consumption
  • Low priority cache data will be removed first

Most probably in your case you have huge memory consumption so ASP.NET decided to save memory by removing you item from the cache.

Also you can register for removal notification (including the reason). See more about that here: https://msdn.microsoft.com/en-us/library/7kxdx246%28v=vs.140%29.aspx