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Update disk-requirements-and-retention.md

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Costa Tsaousis 2024-02-20 19:11:01 +02:00 • committed by GitHub
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docs/netdata-agent/sizing-netdata-agents/disk-requirements-and-retention.md
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Netdata comes with 3 database modes:
1. `dbengine`: the default high-performance multi-tier database of Netdata. Metric samples is cached in memory and saved to disk in multiple tiers, with compression.
1. `dbengine`: the default high-performance multi-tier database of Netdata. Metric samples are cached in memory and are saved to disk in multiple tiers, with compression.
2. `ram`: metric samples are stored in ring buffers in memory, with increments of 1024 samples. Metric samples are not committed to disk. Kernel-Same-Page (KSM) can be used to deduplicate Netdata's memory.
3. `alloc`: metric samples are stored in ring buffers in memory, with flexible increments. Metric samples are not committed to disk.