What is the default time period after which Looker invalidates cached results?

What is the default time period after which Looker invalidates cached results?

• A. 30 minutes
• B. 1 hour
• C. 2 hours
• D. 24 hours

Answer: (B)

Looker uses a caching mechanism to optimize performance by storing results of previously run queries. The default time period after which cached results are invalidated is 1 hour. This means that any query that appears in cache can be reused for up to 60 minutes before Looker checks the underlying data again to ensure that it retrieves fresh results. This cache invalidation period strikes a balance between performance and data freshness, allowing queries to be processed quickly while still providing relatively up-to-date information. Although users can customize the cache expiration settings in their Looker instance according to their specific needs, the default setting of 1 hour is designed to meet typical use cases encountered in data analytics. Other options suggest longer or shorter cache durations that do not align with Looker’s standard settings for cache invalidation, which emphasizes the necessity to understand the default configurations when optimizing data retrieval and system performance.

Looker uses a caching mechanism to optimize performance by storing results of previously run queries. The default time period after which cached results are invalidated is 1 hour. This means that any query that appears in cache can be reused for up to 60 minutes before Looker checks the underlying data again to ensure that it retrieves fresh results.

This cache invalidation period strikes a balance between performance and data freshness, allowing queries to be processed quickly while still providing relatively up-to-date information. Although users can customize the cache expiration settings in their Looker instance according to their specific needs, the default setting of 1 hour is designed to meet typical use cases encountered in data analytics.

Other options suggest longer or shorter cache durations that do not align with Looker’s standard settings for cache invalidation, which emphasizes the necessity to understand the default configurations when optimizing data retrieval and system performance.