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Sphinx - Increment max results

I have a problem with Sphinx 2.2.11, I have a large indexes, when I set a limit greather than 13 elements, I don't receive any results. I think that the problem is due to a limit on packet size. I have just inserted in my sphinx.conf file the properties max_packet_size and mem_limit, but it still doesn't work even if I set limit to 14 elements. So how can I resolve it?

UPDATE

Here my configuration: sphinx.conf

Solution

  • The problem was that after get the results from sphinx, I converted them from array to object with the trick: json_decode(json_encode($results)) and this caused an out of memory of the server.