Thank u for the answer.
We resolved it by resizing the space of the server.
Still i have a question with the warning.
My space is really enough for the db files.
The space is about 25G left.
The ldif file is 5G.
The db file is about 20G.
I don't know how can dsee know i had low space?Where can i config the threshold value?
Thank u very much.