log_line        log_time         log_level   c_ip     cs_bytes  cs_method cs_uri_query   cs_uri_stem   cs_username  cs_vars   cs_version s_app s_core s_pid s_req s_runtime  s_switches s_worker_reqs  sc_bytes  sc_header_bytes sc_headers sc_status log_part log_idle_msecs log_mark log_comment log_tags log_annotations log_filters 
       0 2016-03-13 22:49:12.000 info      127.0.0.1        696 POST            <NULL> /update_metrics                     38 HTTP/1.1   0     3      88185     1      0.129          1             1         47             378          9       200   <NULL>              0        0      <NULL>   <NULL>          <NULL>      <NULL>