Reserve 1G before computing heap size when it is given in percentage.

1 files changed, 3 insertions, 0 deletions

diff --git a/container-disc/src/main/sh/vespa-start-container-daemon.sh b/container-disc/src/main/sh/vespa-start-container-daemon.sh
index 66309a83f93..50c45317105 100755
--- a/container-disc/src/main/sh/vespa-start-container-daemon.sh
+++ b/container-disc/src/main/sh/vespa-start-container-daemon.sh
@@ -75,6 +75,9 @@ configure_memory() {
             available_cgroup=$((available_cgroup_bytes >> 20))
             available=$((available > available_cgroup ? available_cgroup : available))
         fi
+        #Subtract 1G as fixed overhead for an application container.
+        reserved_mem = 1024
+        available=$((available > reserved_mem ? available - reserved_mem : available))
 
         jvm_heapsize=$((available * jvm_heapSizeAsPercentageOfPhysicalMemory / 100))
         jvm_minHeapsize=${jvm_heapsize}