Oneliners: Difference between revisions
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du --max-depth=1 -k /path/to/folder | sort -nr | cut -f2 | xargs -d '\n' du -sh | du --max-depth=1 -k /path/to/folder | sort -nr | cut -f2 | xargs -d '\n' du -sh | ||
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=== Postfix === | |||
Mass-Delete from mailqueue by sender address | |||
<pre> | |||
mailq | awk ' /^[0-9A-F][0-9A-F]*.*user@example.com$/ {print $1}' | xargs -rn1 postsuper -d | |||
</pre> | </pre> | ||
Revision as of 11:53, 18 November 2013
MySQL
Get the "hit rate" percentage of Connections vs. Threads_created, helps you with finding the sweet spot for thread_cache_size (the closer to 100%, the better):
echo "scale=4; 100-`mysql -NB -e "SHOW STATUS LIKE 'Threads_created'; SHOW STATUS LIKE 'Connections';" | awk '{print $2}' | tr '\n' '/'`100" | bc
Filesystem
Get the size of the a folder and it's subdirectories, sorted by size:
du --max-depth=1 -k /path/to/folder | sort -nr | cut -f2 | xargs -d '\n' du -sh
Postfix
Mass-Delete from mailqueue by sender address
mailq | awk ' /^[0-9A-F][0-9A-F]*.*user@example.com$/ {print $1}' | xargs -rn1 postsuper -d