Zero-Disk Streaming Database Backup: 8 GB Dump Processed with Only ~119 MB RAM!

Indhi Farhandika — Mon, 03 Aug 2026 11:56:09 +0000

When managing database backups, key pain points on entry-level servers are memory spikes (Out of Memory crashes) and running out of disk space due to temporary dump files.

To validate the efficiency of LunarDump (a zero-disk streaming backup solution), I conducted a benchmark & memory profiling using Memray across a multi-cloud setup based in Jakarta.

🖥️ Test Environment Setup:

Server A (Database): Tencent Cloud (Jakarta) — Ubuntu 24.04, 2 vCPU, 2 GB RAM, 40 GB SSD
Server B (LunarDump Engine): Cloudeka (Jakarta) — Ubuntu 24.04, 1 vCPU, 1 GB RAM, 20 GB SSD
Destina tion Storage: Google Cloud Storage (GCS) Bucket

📊 Benchmark Highlights:

Total Data Processed: ~8 GB (MySQL Database Stream)
Execution Duration: 1 Hour 1 Minute (Continuous Cross-Cloud Streaming)
Peak Memory Usage (Heap): 119.1 MB (~1.4% of total dataset size)
Resident Set Size (RSS): Stable at ~180 MB
Local Disk Footprint: 0 Bytes (Data streamed from Server A, encrypted with AES-256-GCM in Server B's RAM, and uploaded directly to GCS on-the-fly)
Server B CPU Load: Averaged 4% – 8%

💡 Key Takeaways:
Through Flamegraph visualizations and Resident Set Size Over Time analysis, LunarDump demonstrated Zero Memory Leak. The flat memory footprint confirms that garbage collection and chunk-based buffer recycling function flawlessly—keeping resource consumption predictable even on a low-spec 1 vCPU/ 1 GB RAM node.

Github : lunardump

DEV Community: Indhi Farhandika

Zero-Disk Streaming Database Backup: 8 GB Dump Processed with Only ~119 MB RAM!