tag system mysql problem
 

when I look at the mysql working process, I see a lot of query like;

Status : sorting result.

query : select tagtext as iid from tag where tagtext regexp "^(&[\\\\#\\\\da-z]*;|[^a-z\\\\d])*(&[\\\\#\\\\da-z]*;|[^

lots of them.

what is this? I have server load problem.