I'm asking exactly about ets:insert(web_sessions, #{session_id => <<"1234">>,bytes => 0}). ets:update_counter(web_sessions, <<"1234">>, {bytes, 150}) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://erlang.org/pipermail/erlang-questions/attachments/20140411/25e41e17/attachment.htm>