From 2d569da8499a24a5eb6573c3fbdbb184b04a50b0 Mon Sep 17 00:00:00 2001
From: Christian Rotzoll <christian@geektank.de>
Date: Thu, 8 Aug 2019 02:15:44 +0200
Subject: [PATCH] Give more dbcache RAM during IBD #709

---
 home.admin/50syncHDD.sh            | 18 ++++++++++++++
 home.admin/_background.sh          | 38 ++++++++++++++++++++++++++++++
 home.admin/_bootstrap.provision.sh |  2 +-
 home.admin/assets/bitcoin.conf     |  4 ++--
 4 files changed, 59 insertions(+), 3 deletions(-)

diff --git a/home.admin/50syncHDD.sh b/home.admin/50syncHDD.sh
index a4e113759..229a4dd6c 100755
--- a/home.admin/50syncHDD.sh
+++ b/home.admin/50syncHDD.sh
@@ -56,6 +56,24 @@ if [ "$network" = "bitcoin" ]; then
 
 fi  
 
+echo "*** Optimizing RAM for Sync ***"
+
+kbSizeRAM=$(cat /proc/meminfo | grep "MemTotal" | sed 's/[^0-9]*//g')
+echo "dont forget to reduce dbcache once IBD is done" > "/home/admin/selfsync.flag"
+# RP4 4GB
+if [ ${kbSizeRAM} -gt 3500000 ]; then
+  echo "Detected RAM >=4GB --> optimizing ${network}.conf"
+  sudo sed -i "s/^dbcache=.*/dbcache=3072/g" /mnt/hdd/${network}/${network}.conf
+# RP4 2GB
+elif [ ${kbSizeRAM} -gt 1500000 ]; then
+  echo "Detected RAM >=2GB --> optimizing ${network}.conf"
+  sudo sed -i "s/^dbcache=.*/dbcache=1536/g" /mnt/hdd/${network}/${network}.conf
+# RP3/4 1GB
+else
+  echo "Detected RAM <=1GB --> optimizing ${network}.conf"
+  sudo sed -i "s/^dbcache=.*/dbcache=768/g" /mnt/hdd/${network}/${network}.conf
+fi
+
 echo "*** Activating Blockain Sync ***"
 
 sudo mkdir /mnt/hdd/${network} 2>/dev/null
diff --git a/home.admin/_background.sh b/home.admin/_background.sh
index cb565b045..c1b580127 100644
--- a/home.admin/_background.sh
+++ b/home.admin/_background.sh
@@ -261,6 +261,44 @@ do
     fi
   fi
 
+  ####################################################
+  # CHECK FOR END OF IBD (self validation)
+  ####################################################
+
+  # check every 60secs
+  recheckIBD=$((($counter % 60)+1))
+  if [ ${recheckIBD} -eq 1 ]; then
+    # check if flag exists (got created on 50syncHDD.sh)
+    flagExists=$(ls /home/admin/selfsync.flag 2>/dev/null | grep -c "selfsync.flag")
+    if [ ${flagExists} -eq 1 ]; then
+      finishedIBD=$(bitcoin-cli getblockchaininfo | grep "initialblockdownload" | grep -c "false")
+      if [ ${finishedIBD} -eq 1 ]; then
+
+        echo "CHECK FOR END OF IBD --> reduce RAM and restart bitcoind"
+        
+        # remove flag
+        rm /home/admin/selfsync.flag
+
+        # stop bitcoind
+        sudo systemctl stop bitcoind
+
+        # set dbcache back to normal (to give room for other apps)
+        kbSizeRAM=$(cat /proc/meminfo | grep "MemTotal" | sed 's/[^0-9]*//g')
+        if [ ${kbSizeRAM} -gt 1500000 ]; then
+          echo "Detected RAM >1GB --> optimizing ${network}.conf"
+          sudo sed -i "s/^dbcache=.*/dbcache=1024/g" /mnt/hdd/${network}/${network}.conf
+        else
+          echo "Detected RAM 1GB --> optimizing ${network}.conf"
+          sudo sed -i "s/^dbcache=.*/dbcache=128/g" /mnt/hdd/${network}/${network}.conf
+        fi
+
+        # restart bitcoind
+        sudo systemctl start bitcoind
+
+      fi
+    fi
+  fi
+
   ###############################
   # Prepare next loop
   ###############################
diff --git a/home.admin/_bootstrap.provision.sh b/home.admin/_bootstrap.provision.sh
index 7ba6da1c0..8846b4355 100644
--- a/home.admin/_bootstrap.provision.sh
+++ b/home.admin/_bootstrap.provision.sh
@@ -62,7 +62,7 @@ kbSizeRAM=$(cat /proc/meminfo | grep "MemTotal" | sed 's/[^0-9]*//g')
 if [ ${kbSizeRAM} -gt 1500000 ]; then
   echo "Detected RAM >1GB --> optimizing ${network}.conf"
   sudo sed -i "s/^dbcache=.*/dbcache=1024/g" /mnt/hdd/${network}/${network}.conf
-  sudo sed -i "s/^maxmempool=.*/maxmempool=300/g" /mnt/hdd/${network}/${network}.conf
+  sudo sed -i "s/^maxmempool=.*/maxmempool=256/g" /mnt/hdd/${network}/${network}.conf
 fi
 
 # link and copy HDD content into new OS
diff --git a/home.admin/assets/bitcoin.conf b/home.admin/assets/bitcoin.conf
index 170c57b7c..b98bd22b2 100755
--- a/home.admin/assets/bitcoin.conf
+++ b/home.admin/assets/bitcoin.conf
@@ -19,9 +19,9 @@ zmqpubrawblock=tcp://127.0.0.1:28332
 zmqpubrawtx=tcp://127.0.0.1:28333
 
 # Raspberry Pi optimizations
-dbcache=100
+dbcache=128
 maxorphantx=10
-maxmempool=50
+maxmempool=64
 maxconnections=40
 maxuploadtarget=5000