pgaudit_analyze process filling up audit log file

Hi
I have installed and configured pgAudit extension and the pgAudit Analyzer
https://github.com/pgaudit/pgaudit/tree/REL9_5_STABLE
https://github.com/pgaudit/pgaudit_analyze

I have several databases in the PostgreSQL instance and created the extension and setup the pgaudit analyzer for these database, including the postgres database.

After starting the pgAudit Analyze as a daemon process, ./pgaudit_analyze --daemon /pg_logs/data/pg_log
the log file and the csv file are filling up very fast (1mb per sec) continuously.
The files are filling up with the following continuously:
2016-12-22 15:47:36 ACDT [12735]: [146339-1] db=postgres,user=postgres app=[unknown],host=[local] LOG: duration: 0.106 ms
2016-12-22 15:47:36 ACDT [12735]: [146340-1] db=postgres,user=postgres app=[unknown],host=[local] LOG: duration: 0.021 ms
2016-12-22 15:47:36 ACDT [12735]: [146341-1] db=postgres,user=postgres app=[unknown],host=[local] LOG: duration: 0.086 ms
2016-12-22 15:47:36 ACDT [12735]: [146342-1] db=postgres,user=postgres app=[unknown],host=[local] LOG: duration: 0.022 ms
2016-12-22 15:47:36 ACDT [12735]: [146343-1] db=postgres,user=postgres app=[unknown],host=[local] LOG: duration: 0.167 ms
2016-12-22 15:47:36 ACDT [12735]: [146344-1] db=postgres,user=postgres app=[unknown],host=[local] LOG: duration: 0.030 ms

It only stops when I kill -9 the pgaudit_analyze process.
What is causing this?

Regards
Dylan