Month: September 2008
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What happens when you do "rm -rf /*"
Just for the fun of it. Here is what happens: [root@s10 ~]# cd / [root@s10 /]# dir bin dev initrd lost+found misc opt sbin srv tmp var boot etc lib media mnt proc selinux sys usr [root@s10 /]# rm -rf * rm: cannot remove directory `boot’: Device or resource busy rm: cannot remove directory `dev/shm’:…
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Firefox Performance Tips
Check memory cache usage about:cache?device=memory Reference Disable disk cache config:about => browser.cache.memory and browser.cache.disk
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SHOW COLUMNS FROM MyDatabase.MyTable
That operation will always require a disk read, which is rather expensive, especially for larger tables. For example, for a 500MB table in my test, it takes 0.23 seconds just for this query. I thought the table schema should not depend on its size. Guess there is something more technical than my basic understanding.
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Related keywords & spelling suggestion API
Google Toolbar Auto Complete Replace your own “q=keywords”: http://google.com/complete/search?output=toolbar&q=Ad+Server Google SOAP Search API http://scholar.google.com/apis/reference.html#1_3 Yahoo Related Keywords API http://developer.yahoo.com/search/web/V1/relatedSuggestion.html Yahoo Spelling Suggestion API http://developer.yahoo.com/search/web/V1/spellingSuggestion.html