[Freeswitch-users] module json_cdr not creating all .json cdr when high number of calls

Hello, My freeswitch version is 1.6.10 i have started freeswitch with nice with 19 priority, 'nice -n 19 freeswitch' i am using module json_cdr, here is my config file http://pastebin.com/Mt1AFRVv please note i am writing the logs to json file as well as sending them to nginx web server as well and both legs log are enable i am testing the calls with sipp and sending 10000 calls with 200 cps-call per second and 2000 cc-concurrent calls now after the test i am getting 5192 entires only instead of 20,000(2 legs entry for all 10,000 calls) -> in the other scenario when i send 100 calls with 10 cps and 50 cc, i am getting all 200(100*2) json entries. So what and where is the issue?