shared memory size

Will increasing kernel shared memory size (in linux by doing "echo
134217728 >/proc/sys/kernel/shmall; echo 134217728
>/proc/sys/kernel/shmmax) help with the speed of a complicated query
with a large return set? (average 20000 or more entries in return)

Thanks

-- 
Wei Weng
Network Software Engineer
KenCast Inc.