You can specify that all compiled objects of a particular class should be upgraded in one execution of dbcc upgrade_object; for example, you can upgrade all triggers by using the trigger keyword. However, even though you use only one dbcc command, the upgrade of each object is recorded in a separate transaction; the old row is deleted from sysprocedures and a new row is written. Therefore, if you run dbcc upgrade_object on a large number of compiled objects, your system may run out of log space. Increase the size of the log segment in the databases in which you plan to run this command, to allow sufficient room to log all the upgrades.
