[OSM-dev] Memory Error on 16GB RAM

[Leon Boehmer]

Hi All,

We are trying a query which returns all highways in Europe on our on-premise Overpass. Unfortunately this query currently fails with "runtime error: open64: 0 No error information /osm3s_v0.7.55_osm_base Dispatcher_Client::request_read_and_idx::timeout. The server is probably too busy to handle your request.". By setting maxsize to 5GB and timeout to 900 we have managed to avoid other errors, but we see this error far sooner than the 15 minutes we have given the query. We have managed to trace this message to dispatcher_client.cc<http://client.cc/> line 224 and see some sort of hardcoded timeout of 100 (counter) x 300ms. Unfortunately my understanding of C++ doesn't suffice to actually determine what the code is precisely waiting for and how we can mitigate this particular condition.
The VM Overpass is running on is equipped with 16GB of RAM as well as SSDs and serves no other query at the same time, so we are pretty confident it should be able to execute it in a timely fashion.

Kind Regards,

Leon Boehmer.
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