open_file_cache_min_uses
Sets the minimum number of uses before a file is cached in memory.
Description
The open_file_cache_min_uses directive configures the minimum number of times a file must be accessed before it is considered for caching in the open file cache. This feature optimizes performance by ensuring that only files that have been frequently accessed are stored in memory, reducing the overhead of file system calls for less-used files. When a file is opened, NGINX checks its access count against this directive's value. If the file's access count is above or equal to the specified threshold, it is added to the cache; otherwise, it remains uncached. This approach can lead to substantial efficiency gains, especially in scenarios where certain files are accessed frequently while others are rarely used.
The directive takes an integer as an argument, which represents the minimum number of accesses required. It is highly useful in environments with a large number of static files, preventing the cache from being bloated with files that are seldom needed. The caching behavior can significantly improve response times and reduce disk I/O by maintaining an optimal set of files in memory. It's important to balance the open_file_cache_min_uses with other caching directives to suit your application’s access patterns.
Config Example
http {
open_file_cache max=1000 inactive=20s;
open_file_cache_min_uses 5;
}
Setting this value too high may prevent useful files from being cached.
If the file access patterns change significantly, the directive's value may need adjustment.
Ensure that the total number of files cached does not exceed the defined limits in other open_file_cache settings.