Techopedia Explains Cache Hit A cache hit occurs when an application or software requests data. First, the central processing unit (CPU) looks for the data in its closest memory location, which is usually the primary cache. If the requested data is found in the cache, it is considered a ca...
Cache Hit Ratio (CHR) is a key performance metric used to evaluate the effectiveness of a caching system. In simple terms, it represents the proportion of requests successfully served from the cache rather than being fetched from the original source or backend server. A high cache hit ratio in...
The formula for calculating a cache hit ratio is as follows: For example, if a CDN has 39 cache hits and 2 cache misses over a given timeframe, then the cache hit ratio is equal to 39 divided by 41, or 0.951. The cache hit ratio can also be expressed as a percentage by multiplying...
Underlying cache process A query for a resource is sent to the system or software that has a cache. If the resource is already contained in the cache, it is provided from the cache. This is referred to as a “cache hit.” If the resource is not found in the cache, it’s first ...
If a cache hit occurs, the CPU can get the information almost immediately. However, if the information is not contained in cache, it is called a cache miss. When a cache miss occurs, the CPU must wait for the information to be retrieved from the slower memory....
The CPU checks the memory cache first when it needs to access data for actively running processes. A 'cache hit' occurs when the required data is cached, optimizing performance. A 'cache miss' occurs when data is not cached. Cache misses cause latency as the CPU must access the data furth...
Static CDN cache,CDN:When Alibaba Cloud CDN accelerates the delivery of static resources to a user, Alibaba Cloud CDN retrieves the resources from the origin server and caches the resources on the point of presence (POP) ...
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How does a cache work? When a cache client attempts to access data, it first checks the cache. If the data is found there, that is referred to as acache hit. The percent of attempts that result in a cache hit is called thecache hit rateor ratio. ...
How does a browser cache work? When you’re browsing the internet and try to load a website, you’re essentially sending a request to the cache to check if the data for the page you want is already stored there. If so, this is a called a ‘cache hit,’ and the data will be ret...