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Realtime lines per second in a log file

Terminal - Realtime lines per second in a log file
tail -f logfile | logtop
2012-06-24 19:18:30
User: Sizeof
Functions: tail
-1
Up
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Realtime lines per second in a log file

logtop show number of lines per second, also classify them so you can show a "top" of every aspect of your logfile :

tail -f access.log | awk '{print $1; fflush();}' | logtop

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Alternatives

There are 3 alternatives - vote for the best!

Terminal - Alternatives
tail -f access.log | pv -l -i10 -r >/dev/null
2010-04-29 21:02:01
User: dooblem
Functions: tail
Tags: tail pv
2
Up
Down
Realtime lines per second in a log file

Displays the realtime line output rate of a logfile.

-l tels pv to count lines

-i to refresh every 10 seconds

-l option is not in old versions of pv. If the remote system has an old pv version:

ssh tail -f /var/log/apache2/access.log | pv -l -i10 -r >/dev/null

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tail -f /var/log/logfile|perl -e 'while (<>) {$l++;if (time > $e) {$e=time;print "$l\n";$l=0}}'
2011-06-21 10:28:26
User: madsen
Functions: perl tail time
Tags: perl tail
2
Up
Down
Realtime lines per second in a log file

Using tail to follow and standard perl to count and print the lps when lines are written to the logfile.

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grep <something> logfile | cut -c2-18 | uniq -c
2010-04-29 11:26:09
User: buzzy
Functions: cut grep uniq
Tags: uniq grep cut
1
Up
Down
Count occurrences per minute in a log file

The cut should match the relevant timestamp part of the logfile, the uniq will count the number of occurrences during this time interval.

Show sample output | Comments (0) | Add to favourites | Report as malicious
tail -n0 -f access.log>/tmp/tmp.log & sleep 10; kill $! ; wc -l /tmp/tmp.log
2010-04-29 21:23:46
User: dooblem
Functions: kill sleep tail wc
Tags: tail kill wc sleep
1
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Lines per second in a log file

Another way of counting the line output of tail over 10s not requiring pv.

Cut to have the average per second rate :

tail -n0 -f access.log>/tmp/tmp.log & sleep 10; kill $! ; wc -l /tmp/tmp.log | cut -c-2

You can also enclose it in a loop and send stderr to /dev/null :

while true; do tail -n0 -f access.log>/tmp/tmp.log & sleep 2; kill $! ; wc -l /tmp/tmp.log | cut -c-2; done 2>/dev/null

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tail -F /var/log/nginx/access.log | python -c 'exec("import sys,time\nl=0\ne=int(time.time())\nfor line in sys.stdin:\n\tt = int(time.time())\n\tl += 1\n\tif t > e:\n\t\te = t\n\t\tprint l\n\t\tl = 0")'
2012-05-15 21:56:46
User: pykler
Functions: python tail
Tags: tail python accesslog
0
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Realtime lines per second in a log file

Realtime lines per second in a log file using python ... identical to perl version, except python is much better :)

Show sample output | Comments (0) | Add to favourites | Report as malicious

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