Database is in emergency mode

Hi all,

My database is in suspect mode in production.so by using query bring the database is in emergency mode.

after that i ran dbcc checkdb command it gives error msg

Msg 8921, Level 16, State 1, Line 1 Check terminated. A failure was detected while collecting facts. Possibly tempdb out of space or a system table is inconsistent. Check previous errors..

after that i tried put the database is in single user mode but it takes so much time.

please tell me the solution to bring database in online mode.

very urgent.

thank you