Technology Musings
June 26, 2009
Snippets / What's Taking So Long?
JB
There are a lot of performance analysis tools for Rails logs. However, sometimes you just need something quick and dirty. This one helped me out. 1-line perl script to show all Rails log lines which took more that 100milliseconds to produce:
perl -n -e 'print if(m/\((\d+\.\d+)ms\)/ && $1 > 100);' log/development.log
UPDATE - Here's another handy one:
tail -20000 log/production.log|grep 'Completed in'|cut -d" " -f3,11|sort -n
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