When running smoketests in the `vyos-build` container, an error message similar to the following appears:
```
DEBUG - test_fastnetmon (__main__.TestServiceIDS.test_fastnetmon) ... [ 4213.579433] Out of memory: Killed process 543005 (fastnetmon) total-vm:2301048kB, anon-rss:7432kB, file-rss:1812608kB, shmem-rss:0kB, UID:0 pgtables:3804kB oom_score_adj:0
```
Further investigation reveals that the KVM created for the smoketests is [[ https://github.com/vyos/vyos-build/blob/current/scripts/check-qemu-install#L153 | limited ]] to 3GB of memory. Increasing this to 4GB allows the test to complete successfully. Recommend that this value in the script be increased to 4GB.