Thread:Project:Support desk/Articles size is limited to 64 kb

I can't write articles bigger than 64 kb on my wiki. Whenever it’s bigger than 64 kb, I get an empty article. Any ideas? My host said he changed suhosin.post.max_value_length from 65000 to 256000 but that didn’t change anything. Things like hphp.post.max_value_length mentioned here don’t even exist.