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    <p>Your script has several issues and I think you'll find something like the one below to be better suited to your needs. First, you don't need to be spawning all those processes to do the work - its fairly straightforward to do it all inside awk. Furthermore, the code you posted assumes that a particular UNIQID will occur only on the same date. This assumption will cause much grief if your records wrap around midnight to the next day.</p> <p>The following code does what you want inside an <code>awk</code> script. It assumes you are using <code>gawk</code> (Gnu awk). If you aren't, you can find <code>awk</code> implementations of mktime on the web <a href="http://www.math.utah.edu/docs/info/gawk_16.html#SEC147" rel="nofollow">including here</a></p> <pre><code>BEGIN { while (getline &lt; UIDFILE) { x[$0] = 1; # Awk will maintain these as an associative array, lookups are hashed } } { r = $NF; # Extract the unique ID from the record into r if (r in x) { # If the UID is something we are interested in, then ... ts = $1 " " $2; # concatenate these fields gsub ("[:-]", " ", ts); # Replace the : and - with spaces gsub (",.*", "", ts); # Remove everything after the comma # print ts, mktime(ts) # If you want to see what mktime does if (x[r] == "") # First time seeing this unique ID? x[r] = mktime(ts); # Store the timestamp else { # We're seeing it the second time now = mktime(ts) # Keep track of the current log time rt = now - x[r]; # Compute the delta delete (x[r]) # We don't need it any more # printf "Record &lt;%s&gt; has response time %f\n", r, rt; # Print it out if you'd like hourrt += rt; # Add it to this hour's total response time num++; # And also keep track of how many records we have ending in this hour if (now % 3600 == 0) { # Have we switched to a new hour? printf "Average response time = %f\n", hourrt / num; # Dump the average num = hourrt = 0; } } } } </code></pre> <p>You will need to invoke this script as follows:</p> <pre><code>gawk -v UIDFILE=name_of_uid_file -f scriptname.awk </code></pre>
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    1. POCompute Average response time on hourly basis
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    1. USRam Rajamony
    1. USRam Rajamony
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    1. COThanks Ram for your suggestions. Yes, I agree as I am new to scripting so you might see novice style in code. I am using on GNU AWK. I will try this and let you know the outcome
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    2. COHi Ram, I am facing issue while running this code. I have made up this test.awk and command m using is : awk -f test.awk test.log > output.log
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    3. COactually I am using another awk to get uid in the log file and putting them in array. So while using ur awk I am not able to pass these uid to your awk. here is code to get uid uids=`cat $i|grep "Service" |awk 'BEGIN {FS="lt;";RS ="gt;"} {print $2;}'| sort -u`
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