For example, when a video file starts downloading to fulfill the initial request for a part of the file, subsequent requests have to wait for the entire file to be downloaded and put into the cache. The initial cache fill operation sometimes takes quite a long time, especially for large files. Proxy_cache_path /data/nginx/cache levels=1:2 keys_zone=mycache:10m purger=on In the following example, iterations last 300 milliseconds or until 200 items have been loaded:
loader_sleeps – Delay between iterations, in milliseconds (by default, 50). loader_files – Maximum number of items loaded during one iteration (by default, 100). loader_threshold – Duration of an iteration, in milliseconds (by default, 200). To avoid this, configure iterative loading of the cache by including the following parameters to the proxy_cache_path directive: Loading the whole cache at once could consume sufficient resources to slow NGINX performance during the first few minutes after startup. It loads metadata about previously cached data into the shared memory zone. The cache loader runs only once, right after NGINX starts. As previously mentioned, the amount of cached data can temporarily exceed the limit during the time between cache manager activations. If the cache size exceeds the limit set by the max_size parameter to the proxy_cache_path directive, the cache manager removes the data that was accessed least recently. The cache manager is activated periodically to check the state of the cache. There are two additional NGINX processes involved in caching: (But note that the amount of cached data can temporarily exceed this limit, as described in the following section.) To limit the amount of cached response data, include the max_size parameter to the proxy_cache_path directive. Cached responses themselves are stored with a copy of the metadata in specific files on the filesystem. Note that the size defined by the keys_zone parameter does not limit the total amount of cached response data. 
Proxy_cache_path /data/nginx/cache keys_zone=one:10m The mandatory first parameter is the local filesystem path for cached content, and the mandatory keys_zone parameter defines the name and size of the shared memory zone that is used to store metadata about cached items: To enable caching, include the proxy_cache_path directive in the top‑level http context. To learn more about NGINX Plus’s caching capabilities, watch the Content Caching with NGINX webinar on demand and get an in‑depth review of features such as dynamic content caching, cache purging, and delayed caching.
#Open source gt manager plus#
When caching is enabled, NGINX Plus saves responses in a disk cache and uses them to respond to clients without having to proxy requests for the same content every time. Cache both static and dynamic content from your proxied web and application servers, to speed delivery to clients and reduce the load on the servers.
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