If you are performing database consistency checking at a time when other activity on the server is low, configuring high asynchronous prefetch limits on the pools used by dbcc can speed consistency checking.
dbcc checkalloc can use special internal 16K buffers if there is no 16K pool in the cache for the appropriate database. If you have a 2K pool for a database, and no 16K pool, set the local prefetch limit to 0 for the pool while executing dbcc checkalloc. Use of the 2K pool instead of the 16K internal buffers may actually hurt performance.
