diff --git a/ceph.spec b/ceph.spec
index 6b96c5c..a9ed9b5 100644
--- a/ceph.spec
+++ b/ceph.spec
@@ -944,7 +944,7 @@ free -h
 echo "System limits:"
 ulimit -a
 if test -n "$CEPH_SMP_NCPUS" -a "$CEPH_SMP_NCPUS" -gt 1 ; then
-    mem_per_process=1800
+    mem_per_process=2700
     max_mem=$(LANG=C free -m | sed -n "s|^Mem: *\([0-9]*\).*$|\1|p")
     max_jobs="$(($max_mem / $mem_per_process))"
     test "$CEPH_SMP_NCPUS" -gt "$max_jobs" && CEPH_SMP_NCPUS="$max_jobs" && echo "Warning: Reducing build parallelism to -j$max_jobs because of memory limits"