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## Problem The cache was introduced as a hackathon project and the only supported limit was the number of entries. The basebackup entry size may vary. We need to have more control over disk space usage to ship it to production. - Part of https://github.com/neondatabase/cloud/issues/29353 ## Summary of changes - Store the size of entries in the cache and use it to limit `max_total_size_bytes` - Add the size of the cache in bytes to metrics.