Issue #2404: chore(ci): reduce swap size in gha_lvm_overlay.sh

Author: jiridanek

ci/cached-builds/gha_lvm_overlay.sh

@@ -11,7 +11,9 @@ set -Eeuo pipefail
 root_reserve_mb=4096
 temp_reserve_mb=100
 # compilation from sources needs memory, for now that's codeserver
-swap_size_mb=16384
+# 16GB is wasteful, 0.5GB is not enough
+# https://github.com/opendatahub-io/notebooks/issues/2404
+swap_size_mb=2048
 
 build_mount_path="${HOME}/.local/share/containers"
 build_mount_path_ownership="runner:runner"