Hi:

We are experiencing low cache hit ratio in Nginx server. It turned out
that one reason is client may be sending the same requests with
parameters in different orders.

e.g.

foo?p1=a&p2=b&p3=c
foo?p2=b&p1=a&p3=c

And our cache key is set as
proxy_cache_key $uri$is_args$args;

It is not feasible to change all clients to resort their urls. Is
there any way in Nginx to address that?

Thanks,
-Wei

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