ssl_object_cache_inheritable

The ssl_object_cache_inheritable directive is a flag that controls the inheritance of the SSL object cache settings in NGINX. When this directive is set to 'on', it allows the SSL object cache settings to be inherited by child contexts, such as server or location blocks, enabling a more flexible and centralized management of SSL caching behaviors. This can be especially useful for complex configurations where multiple server blocks should share the same SSL object cache settings.

By default, SSL caching mechanisms enhance performance by storing SSL session parameters and objects, thus reducing the overhead associated with establishing new SSL connections. The ability to inherit these settings ensures that developers don’t have to duplicate cache settings across various blocks, streamlining the configuration process and minimizing potential errors that could arise from inconsistent settings.

If ssl_object_cache_inheritable is omitted, the behavior defaults to not allowing inheritance, retaining the old behavior where cache settings need to be explicitly defined in each relevant block. This directive is particularly significant in environments where SSL performance is critical, allowing for a consistent caching strategy across different server configurations.