Tile server: caching
Tile server should use longer TTL in caching headers, especially for zoom levels 0-6, as tiles on these levels scan a lot of accession records. On higher zoom levels, fewer records are required and the TTL can be lower.
Set max-age header as follows:
- 0-4: max-age 1day
- 4-6: max-age 1hr
- 7+: max-age 5min