How to calculate http connections peak per second

[adrian.gibanel.btactic]

According to Performance Tuning Guidelines for Large Deployments (HTTP) you should be able to calculate the number of http connections peak per second by taking a look at:

access_log files (The ones found at /opt/zimbra/log/ I suppose).

I suppose that it is a matter of a bash script with some of awk so that after taking out the day+hour I just leave the lines that have repeated hour+second string and just leave the ones that have more lines so that I get the peak by tunneling it to wc -l command.

Is the algorithm idea right?

Has anyone written this such a parser script? It would be nice if you could share it. Thank you.

[adrian.gibanel.btactic]

I have managed to code the script.

I am having troubles creating wiki account (not Zimbra fault but mine). When I'm able to create it I will update the page's discussion so that someone hopefully includes the script in the official page.

Here there is how you run the script:

cat access_log.2012-02-06 | awk -F ' ' '{print $4}' | awk -f access_log.awk

.

And here there is the access_log.awk file contents:

BEGIN {
    FS=":"
    Peak = 1
    CurrentPeak = 0
    oldVar=""

}

{
  #printf ("Linea: %s\n", $0)
  hour = $2
  minute = $3
  second = $4 
  #printf("hour: %s, minute: %s, second: %s\n",hour,minute,second)
  currentVar = hour minute second
  #printf ("currentVar definido: %s\n", currentVar)
  #printf ("oldVar definido: %s\n", oldVar)
  if ( currentVar == oldVar ) 
    {
      #printf ("1Current var vale: %s\n",currentVar)
      #print "CurrentVar es igual que oldVar"
      CurrentPeak ++
      if ( CurrentPeak > Peak) 
	{
	  Peak = CurrentPeak
	  PeakLine = $0
	}
    } else 

    {
      #printf ("2Current var vale: %s\n",currentVar)
      #print "CurrentVar es DIFERENTE de oldVar"
      CurrentPeak = 1
    }
  oldVar=currentVar
}

END {

print "Peak per second is: " Peak
print "Latest Peak line is: " PeakLine

}