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Hush Full Node software. We were censored from Github, this is where all development happens now. https://hush.is
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hush3/doc/reducing-memory-usage.md

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In-memory caches

The size of some in-memory caches can be reduced. As caches trade off memory usage for performance, usually reducing these have a negative effect on performance.

  • -dbcache=<n> - the UTXO database cache size, this defaults to 450 (100 before 1.0.15). The unit is MiB (where 1 GiB = 1024 MiB).
    • The minimum value for -dbcache is 4.
    • A lower dbcache make initial sync time much longer. After the initial sync, the effect is less pronounced for most use-cases, unless fast validation of blocks is important such as for mining.