From 334d591377896421e356dfbfb57c8f9022970cf3 Mon Sep 17 00:00:00 2001
From: Simon <simon@bitcartel.com>
Date: Wed, 17 Jan 2018 16:55:26 -0800
Subject: [PATCH] Add documentation about dbcache.

Adapted from documentation 'Reducing bitcoind memory usage' by @laanwj
https://gist.github.com/laanwj/efe29c7661ce9b6620a7
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 doc/reducing-memory-usage.md | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 doc/reducing-memory-usage.md

diff --git a/doc/reducing-memory-usage.md b/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.