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Haproxy hash table limit for consistent hashing

Hello all,

I have configuration as shown below. It works very well but i want to know, is there a limitation for hash table? For example, what happens if I use this configuration for 10 million urls? What is the resource consumption of the hash table?

http-request set-header x-lb %[req.hdr(x-cons),lower]%[capture.req.uri,lower]
balance hdr(x-lb)
hash-type consistent

Thanks in advance