strange files in database directory

Hello, I was wondering why the partition is almost full, since the databases aren't very big. Then I noticed these files in the database directory: -rw-rw 1 mysql mysql4310560 Dec 24 10:13 #sql_10d4_0.MYD -rw-rw 1 mysql mysql 1024 Dec 24 10:13 #sql_10d4_0.MYI -rw-rw

Connections on Database

Hi, How can i limit connections to my database? Regards, Velen