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-rw-r--r--doc/build-unix.md11
1 files changed, 7 insertions, 4 deletions
diff --git a/doc/build-unix.md b/doc/build-unix.md
index 1121a3507f..60c9d57b0a 100644
--- a/doc/build-unix.md
+++ b/doc/build-unix.md
@@ -50,12 +50,15 @@ Optional dependencies:
For the versions used in the release, see [release-process.md](release-process.md) under *Fetch and build inputs*.
-System requirements
+Memory Requirements
--------------------
-C++ compilers are memory-hungry. It is recommended to have at least 1 GB of
-memory available when compiling Bitcoin Core. With 512MB of memory or less
-compilation will take much longer due to swap thrashing.
+C++ compilers are memory-hungry. It is recommended to have at least 1.5 GB of
+memory available when compiling Bitcoin Core. On systems with less, gcc can be
+tuned to conserve memory with additional CXXFLAGS:
+
+
+ ./configure CXXFLAGS="--param ggc-min-expand=1 --param ggc-min-heapsize=32768"
Dependency Build Instructions: Ubuntu & Debian
----------------------------------------------