用 shell script 检测rails app中最耗时的action

之前 robbin 等人在这里贴出了他们检测rails app log 文件里最耗费时间action的方法。因为rails环境一直在改变，我的log file文件格式跟他们的不大一样，所以就自己动手写了一个。

这个shell script能从所有的 status 200 请求里面找到最费时间的200个。

#!/bin/sh
# @(#) rails_request_timing.sh 1.0.0.20090610  initial release  Peter.Zhang

# Read Me
# This shell script will pick up the first 200 time costly requests from rails development or probduction log.

# Usage:
# rails_request_timing.sh path/to/*/log

if [ -z $1 ] ;then
  echo "Usage: rails_request_timing.sh <log filename>"  
else
  echo "Writing result to [ `pwd`/request_timing.log ] file..."
  grep "200 OK" $1 | awk '{print "All: " $3/60000 "m [" $3/1000 "s] View: [" $5/1000 "s] DB: [" $7/1000 "s] URL: " $11 }'| sort -r | head -n 200 > request_timing.log
  echo "Done."
fi