awk command optimization Post: 302917034

Sponsored Content

Top Forums Shell Programming and Scripting awk command optimization Post 302917034 by jim mcnamara on Saturday 13th of September 2014 10:48:53 AM

09-13-2014

Registered User

FWIW -

Code:

egrep -c '(error|fail|panic|accepted)' logfile

Does a lot of what your awk code does, not all of it.

Code:

for (w in a)
 {
         if ($0 ~ a[w])
                 d[a[w]]++
 }

This code above means you loop 5 times on every line. I do not think regex in awk supports alternation, someone who knows more please comment. But that would be the first place to attack your problem. And if you search for more terms your program will iterate more times over each line of input.

This is the same problem we have when we use grep -f list_of_items filename with a large number of entries in list_of_items.

Edit: the red comment is flat wrong. Alternation is possible. You can rewrite the main loop to use it.

Code:

{ /error|wanting|panic|failure/ } { [define array here]++..... }

Last edited by jim mcnamara; 09-13-2014 at 11:55 AM..

This User Gave Thanks to jim mcnamara For This Post:

jim mcnamara

View Public Profile for jim mcnamara

Find all posts by jim mcnamara

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

script optimization

:o Hi, I am writing a script in which at some time, I need to get the process id of a special process and kill it... I am getting the PID as follows... ps -ef | grep $PKMS/scripts | grep -v grep | awk '{print $2 }'can we optimize it more further since my script already doing lot of other...

2. Shell Programming and Scripting

AWK optimization

Hello, Do you have any tips on how to optimize the AWK that gets the lines in the log between these XML tags? se2|6|<ns1:accountInfoRequest xmlns:ns1="http://www.123.com/123/ se2|6|etc2"> .... <some other tags> se2|6|</ns1:acc se2|6|ountInfoRequest> The AWK I'm using to get this...

3. Shell Programming and Scripting

sed optimization

I have a process using the following series of sed commands that works pretty well. sed -e 1,1d $file |sed 1i\\"EHLO Broadridge.com" |sed 2i\\"MAIL FROM:${eaddr}"|sed 3i\\"RCPT TO:${eaddr}"|sed 4i\\"DATA"|sed 5s/.FROM/FROM:/|sed 6s/.TO/TO:/|sed 7,7d|sed s/.ENDDATA/./|sed s/.ENDARRAY// >temp/$file...

4. Shell Programming and Scripting

Awk script gsub optimization

I have created Shell script with below awk code for replacing special characters from input file. Source file has 6 mn records. This script was able to handle 2 mn records in 1 hr. This is very slow speed and we need to optimise our processing. Can any Guru help me for optimization...

5. Shell Programming and Scripting

awk command in script gives error while same awk command at prompt runs fine: Why?

Hello all, Here is what my bash script does: sums number columns, saves the tot in new column, outputs if tot >= threshold val: > cat getnon0file.sh #!/bin/bash this="getnon0file.sh" USAGE=$this" InFile="xyz.38" Min="0.05" # awk '{sum=0; for(n=2; n<=NF; n++){sum+=$n};...

6. Shell Programming and Scripting

CPU optimization

hi guys , I have 10 scripts suppose 1.sh , 2.sh ,3.sh ,4.sh ......10.sh each takes some time ( for instance 2 minutes to 40 minutes ) my server can run around 3-4 files at a time suppose, 1.sh , 2.sh , 3.sh are running currently now as soon as ANY ONE of the gets finished i...

7. Shell Programming and Scripting