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Grep logs and find max memory usage

Posted on 2011-02-22
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Last Modified: 2013-12-26
Hi,

I have the below log. The last number in each line is my memory usage. I need to grep out this for each line and find the maximum. How do I do this?

2011-02-22T06:45:15.197+0000: 13.952: 19127
2011-02-22T06:51:18.475+0000: 377.230: 771439
2011-02-22T07:47:53.903+0000: 3772.658: 1188357
2011-02-22T08:18:21.294+0000: 5600.049: 1162929
2011-02-22T09:17:24.116+0000: 9142.871: 1152012
2011-02-22T09:41:42.308+0000: 10601.063: 1158554
2011-02-22T10:07:37.928+0000: 12156.683: 1158997
2011-02-22T10:32:53.781+0000: 13672.535: 1165669
2011-02-22T10:57:32.298+0000: 15151.053: 1172145
2011-02-22T11:23:24.918+0000: 16703.673: 1178016
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Question by:bowemc
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by:woolmilkporc
ID: 34950699
awk -F: '{print $NF}' /path/to/logfile | sort -n | tail -1

wmp
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Author Comment

by:bowemc
ID: 34950788
almost perfect. seems to have a whitespace in the front. Can I somehow trim this?
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Accepted Solution

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woolmilkporc earned 2000 total points
ID: 34950954
If there is always a whitespace in front of the number in the inputfile you can omit "-F:"

awk '{print $NF}' /path/to/logfile | sort -n | tail -1

If youre not sure you could do

echo $(awk -F: '{print $NF}' /path/to/logfile | sort -n | tail -1)
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