add opt-save-memory

README.md

@@ -155,6 +155,7 @@ Available `BTCPAYGEN_ADDITIONAL_FRAGMENTS` currently are:
 * [opt-save-storage-xs](docker-compose-generator/docker-fragments/opt-save-storage-xs.yml) will keep around 3 months of blocks (prune BTC for 25 GB)
 * [opt-save-storage-xxs](docker-compose-generator/docker-fragments/opt-save-storage-xxs.yml) will keep around 2 weeks of blocks (prune BTC for 5 GB) (lightning not supported)
 * [opt-lnd-autopilot](docker-compose-generator/docker-fragments/opt-lnd-autopilot.yml) will activate auto pilot on LND. (5 channels, 60% of allocation)
+* [opt-save-memory](docker-compose-generator/docker-fragments/opt-save-memory.yml) will decrease the default dbcache at the expense of longer synchronization time (Useful if your machine is less than 2GB)
 
 You can also create your own [custom fragments](#how-can-i-customize-the-generated-docker-compose-file).
 

docker-compose-generator/docker-fragments/opt-save-memory.yml

@@ -0,0 +1,23 @@
+version: "3"
+# If you don't use Lightning Network, you want this
+# This save about 2 weeks worth of block
+
+services:
+  bitcoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: dbcache=300
+  bgoldd:
+    environment:
+      BITCOIN_EXTRA_ARGS: dbcache=300
+  feathercoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: dbcache=300
+  groestlcoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: dbcache=300
+  litecoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: dbcache=300
+  viacoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: dbcache=300