Re: MyISAM table size vs actual data, and performance

2013-02-22 Thread Johan De Meersman
- Original Message - > From: "Rick James" Hey Rick, Thanks for your thoughts. > * Smells like some huge LONGTEXTs were INSERTed, then DELETEd. > Perhaps just a single one of nearly 500M. I considered that, too; but I can see the on-disk size grow over a period of a few months - it's

RE: MyISAM table size vs actual data, and performance

2013-02-21 Thread Rick James
* Smells like some huge LONGTEXTs were INSERTed, then DELETEd. Perhaps just a single one of nearly 500M. * Yes, there is an impact on full table scans -- it has to step over the empty spots. Or maybe not -- one big cow chip of 500MB would be easy to leap over. * OPTIMIZE TABLE is the primary