Thread:Project:Support desk/Gigabytes of data taken up by MySQL database for mediawiki installation/reply

Ok. first of all, try deleting everything in the objectcache table. (The following is assuming the objectcache table is taking up most the space

if $wgMainCacheType is set to CACHE_DB or CACHE_ANYTHING, try setting it to CACHE_NONE (Warning, will make your sight slow. Install memcache or APC, and then set that setting appropriately to make your site both speedy and not eat all db space). Similarly do the same thing for $wgParserCacheType (This one defaults to CACHE_ANYTHING, so you may need to specifically add it to LocalSettings.php).

You can also try $wgCompressRevisions which will make text be stored as compressed (although some of the scripts in maintinance/storage might offer better compression ratios then that option).