Frosen while operation keys("*")

Hello
I use this code to get all data from db
Count of all is 200k
One record contain 10 symbols

local master, err = rc:connect_via_sentinel(params)
local res, err = master:keys("*")
            
            if not res then
                ngx.say("Failed to get fingerprints of certificates: ", err)
                return
            end
            
            if res == ngx.null or table.getn(res) == 0 then
                ngx.say("Fingerprints not found.")
                return
            else
                ngx.say("All fingerprints")
                
                for i, r in pairs(res) do
                    ngx.say(i, ") ", r)
                end
            end

I get master from sentinel and work with it . So I don't include code of getting master
It works fine with not more records

Start by reproducing the supplied master:keys("*") loop with a large Redis dataset and inspect the client entry point behind master:keys. Compare its behavior with Redis command semantics and Sentinel-backed connections. Done means the freeze is explained and the issue has a scoped fix or a documented limitation.