Description
Maximum number of seconds to keep a record in the search cache.
The search cache can dramatically increase the performance and the responsiveness of your search engine,
especially for large queries. It is in average 10 to 100 times faster to fetch an existing record in the cache
rather than performing an exhaustive search in the index. The cache is adjusting its size depending on the server
load and the amount of requests per second performed.
This option was added in version 1.7.1113.0.
