log_line log_part  log_time log_idle_msecs log_level log_mark log_comment log_tags log_annotations 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   2016-03-13 22:49:12.000  0 info   0         127.0.0.1  696 POST    /update_metrics        38 HTTP/1.1  0  3  88185  1  0.129  1  1  47  378  9    200