Drupal Association members fund grants that make connections all over the world.
After discovering a performance decrease in mysql I checked all databases and tables, found that cache_swftools had grown to 4.1 gb. The swftools cache has been cleared several times allthough not recently. Site is drushed at least once a week, all caches are cleared upon finish.
Drupal version is 6.19 and is in line to be upgraded to 6.20