log_line log_part        log_time         log_idle_msecs log_level log_mark log_comment log_tags log_filters   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 
       0   <NULL> 2016-03-13 22:49:12.000              0 info             0      <NULL>   <NULL>      <NULL> 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