ARC2 Proxy
Caching Per-domain rule boolean

ignore_query_string

Treat URLs that differ only by query string as the same cache entry.

Config key
ignore_query_string
Scope
Per-domain rule
Type
boolean
Default
true

Controls whether the query string is part of the cache key. When true, /p?utm=a and /p?utm=b share one cached copy; when false, each distinct query string is cached separately.

Cache hit ratio
Ignoring the query string dramatically raises hit ratio for pages decorated with tracking parameters (utm_*, fbclid). Only set it to false when the query genuinely changes the response (search results, paginated APIs).
ignore_query_string = true