diff --git a/.env-sample b/.env-sample
index 3acd3de..c1cd452 100644
--- a/.env-sample
+++ b/.env-sample
@@ -26,6 +26,12 @@
 #BTCEXP_INFLUXDB_USER=dbuser
 #BTCEXP_INFLUXDB_PASS=dbpassword
 
+# Disable app's in-memory RPC caching to reduce memory usage
+#BTCEXP_NO_INMEMORY_RPC_CACHE=true
+
+# Optional redis server for RPC caching
+#BTCEXP_REDIS_URL=redis://localhost:6379
+
 #BTCEXP_COOKIE_SECRET=0000aaaafffffgggggg
 
 # Whether public-demo aspects of the site are active
diff --git a/app/api/coreApi.js b/app/api/coreApi.js
index 30f9b3e..2b3348f 100644
--- a/app/api/coreApi.js
+++ b/app/api/coreApi.js
@@ -1,4 +1,6 @@
 var debug = require("debug")("coreApi");
+var redis = require("redis");
+var bluebird = require("bluebird");
 
 var LRU = require("lru-cache");
 var fs = require('fs');
@@ -11,9 +13,95 @@ var coins = require("../coins.js");
 var rpcApi = require("./rpcApi.js");
 //var rpcApi = require("./mockApi.js");
 
-var miscCache = LRU(50);
-var blockCache = LRU(50);
-var txCache = LRU(200);
+var redisClient = null;
+if (config.redisUrl) {
+	bluebird.promisifyAll(redis.RedisClient.prototype);
+
+	redisClient = redis.createClient({url:config.redisUrl});
+}
+
+function onCacheEvent(cacheType, hitOrMiss, cacheKey) {
+	//console.log(`cache.${cacheType}.${hitOrMiss}: ${cacheKey}`);
+}
+
+function createMemoryLruCache(cacheObj) {
+	return {
+		get:function(key) {
+			return new Promise(function(resolve, reject) {
+				var val = cacheObj.get(key);
+
+				if (val != null) {
+					onCacheEvent("memory", "hit", key);
+
+				} else {
+					onCacheEvent("memory", "miss", key);
+				}
+
+				resolve(cacheObj.get(key));
+			});
+		},
+		set:function(key, obj, maxAge) { cacheObj.set(key, obj, maxAge); }
+	}
+}
+
+var noopCache = {
+	get:function(key) {
+		return new Promise(function(resolve, reject) {
+			resolve(null);
+		});
+	},
+	set:function(key, obj, maxAge) {}
+};
+
+var miscCache = null;
+var blockCache = null;
+var txCache = null;
+
+if (config.noInmemoryRpcCache) {
+	miscCache = noopCache;
+	blockCache = noopCache;
+	txCache = noopCache;
+
+} else {
+	miscCache = createMemoryLruCache(LRU(50));
+	blockCache = createMemoryLruCache(LRU(50));
+	txCache = createMemoryLruCache(LRU(200));
+}
+
+if (redisClient) {
+	var redisCache = {
+		get:function(key) {
+			return new Promise(function(resolve, reject) {
+				redisClient.getAsync(key).then(function(result) {
+					if (result == null) {
+						onCacheEvent("redis", "miss", key);
+
+						resolve(result);
+
+						return;
+					}
+
+					onCacheEvent("redis", "hit", key);
+
+					resolve(JSON.parse(result));
+
+				}).catch(function(err) {
+					console.log(`Error 328rhwefghsdgsdss: ${err}`);
+
+					reject(err);
+				});
+			});
+		},
+		set:function(key, obj, maxAge) {
+			redisClient.set(key, JSON.stringify(obj), "PX", maxAge);
+		}
+	};
+
+	miscCache = redisCache;
+	blockCache = redisCache;
+	txCache = redisCache;
+}
+
 
 
 
@@ -36,27 +124,44 @@ function tryCacheThenRpcApi(cache, cacheKey, cacheMaxAge, rpcApiFunction, cacheC
 	}
 
 	return new Promise(function(resolve, reject) {
-		var result = cache.get(cacheKey);
-		if (result) {
-			resolve(result);
+		var cacheResult = null;
 
-		} else {
-			rpcApiFunction().then(function(result) {
-				if (result != null && cacheConditionFunction(result)) {
-					cache.set(cacheKey, result, cacheMaxAge);
-				}
+		cache.get(cacheKey).then(function(result) {
+			cacheResult = result;
+			
+		}).catch(function(err) {
+			console.log(`Error nds9fc2eg621tf3: key=${cacheKey}, err=${err}`);
 
-				resolve(result);
+		}).finally(function() {
+			if (cacheResult != null) {
+				resolve(cacheResult);
 
-			}).catch(function(err) {
-				reject(err);
-			});
-		}
+			} else {
+				rpcApiFunction().then(function(rpcResult) {
+					if (rpcResult != null && cacheConditionFunction(rpcResult)) {
+						cache.set(cacheKey, rpcResult, cacheMaxAge);
+					}
+
+					resolve(rpcResult);
+
+				}).catch(function(err) {
+					reject(err);
+				});
+			}
+		});
 	});
 }
 
 function shouldCacheTransaction(tx) {
-	return (tx.confirmations > 0);
+	if (tx.confirmations < 1) {
+		return false;
+	}
+
+	if (tx.vin.length > 9) {
+		return false;
+	}
+
+	return true;
 }
 
 
@@ -78,7 +183,7 @@ function getMempoolInfo() {
 }
 
 function getMiningInfo() {
-	return tryCacheThenRpcApi(miscCache, "getMiningInfo", 1000, rpcApi.getMiningInfo);
+	return tryCacheThenRpcApi(miscCache, "getMiningInfo", 30000, rpcApi.getMiningInfo);
 }
 
 function getUptimeSeconds() {
@@ -468,7 +573,7 @@ function getMempoolStats() {
 			debug(JSON.stringify(sizeBucketLabels));*/
 
 			resolve(summary);
-			
+
 		}).catch(function(err) {
 			reject(err);
 		});
@@ -482,51 +587,18 @@ function getBlockByHeight(blockHeight) {
 }
 
 function getBlocksByHeight(blockHeights) {
-	var blockHeightsNotInCache = [];
-	var blocksByIndex = {};
-
-	for (var i = 0; i < blockHeights.length; i++) {
-		var blockI = blockCache.get("getBlockByHeight-" + blockHeights[i]);
-		if (blockI == null) {
-			blockHeightsNotInCache.push(blockHeights[i]);
-
-		} else {
-			blocksByIndex[i] = blockI;
-		}
-	}
-
 	return new Promise(function(resolve, reject) {
-		var combinedBlocks = [];
-		if (blockHeightsNotInCache.length > 0) {
-			rpcApi.getBlocksByHeight(blockHeightsNotInCache).then(function(queriedBlocks) {
-				var queriedBlocksCurrentIndex = 0;
-				for (var i = 0; i < blockHeights.length; i++) {
-					if (blocksByIndex.hasOwnProperty(i)) {
-						combinedBlocks.push(blocksByIndex[i]);
-
-					} else {
-						var queriedBlock = queriedBlocks[queriedBlocksCurrentIndex];
-						
-						combinedBlocks.push(queriedBlock);
-
-						blockCache.set("getBlockByHeight-" + queriedBlock.height, queriedBlock, 3600000);
-
-						queriedBlocksCurrentIndex++;
-					}
-				}
-
-				resolve(combinedBlocks);
+		var promises = [];
+		for (var i = 0; i < blockHeights.length; i++) {
+			promises.push(getBlockByHeight(blockHeights[i]));
+		}
 
-			}).catch(function(err) {
-				console.log("Error 39g2rfyewgf: " + err);
-			});
-		} else {
-			for (var i = 0; i < blockHeights.length; i++) {
-				combinedBlocks.push(blocksByIndex[i]);
-			}
+		Promise.all(promises).then(function(results) {
+			resolve(results);
 
-			resolve(combinedBlocks);
-		}
+		}).catch(function(err) {
+			reject(err);
+		});
 	});
 }
 
@@ -537,48 +609,18 @@ function getBlockByHash(blockHash) {
 }
 
 function getBlocksByHash(blockHashes) {
-	var blockHashesNotInCache = [];
-	var blocksByIndex = {};
-
-	for (var i = 0; i < blockHashes.length; i++) {
-		var blockI = blockCache.get("getBlockByHash-" + blockHashes[i]);
-		if (blockI == null) {
-			blockHashesNotInCache.push(blockHashes[i]);
-
-		} else {
-			blocksByIndex[i] = blockI;
-		}
-	}
-
 	return new Promise(function(resolve, reject) {
-		var combinedBlocks = [];
-		if (blockHashesNotInCache.length > 0) {
-			rpcApi.getBlocksByHash(blockHashesNotInCache).then(function(queriedBlocks) {
-				var queriedBlocksCurrentIndex = 0;
-				for (var i = 0; i < blockHashes.length; i++) {
-					if (blocksByIndex.hasOwnProperty(i)) {
-						combinedBlocks.push(blocksByIndex[i]);
-
-					} else {
-						var queriedBlock = queriedBlocks[queriedBlocksCurrentIndex];
-
-						combinedBlocks.push(queriedBlock);
-
-						blockCache.set("getBlockByHash-" + queriedBlock.hash, queriedBlock, 3600000);
-
-						queriedBlocksCurrentIndex++;
-					}
-				}
+		var promises = [];
+		for (var i = 0; i < blockHashes.length; i++) {
+			promises.push(getBlockByHash(blockHashes[i]));
+		}
 
-				resolve(combinedBlocks);
-			});
-		} else {
-			for (var i = 0; i < blockHeights.length; i++) {
-				combinedBlocks.push(blocksByIndex[i]);
-			}
+		Promise.all(promises).then(function(results) {
+			resolve(results);
 
-			resolve(combinedBlocks);
-		}
+		}).catch(function(err) {
+			reject(err);
+		});
 	});
 }
 
@@ -597,51 +639,18 @@ function getAddress(address) {
 }
 
 function getRawTransactions(txids) {
-	var txidsNotInCache = [];
-	var txsByIndex = {};
-
-	for (var i = 0; i < txids.length; i++) {
-		var txI = txCache.get("getRawTransaction-" + txids[i]);
-		if (txI == null) {
-			txidsNotInCache.push(txids[i]);
-
-		} else {
-			txsByIndex[i] = txI;
-		}
-	}
-
 	return new Promise(function(resolve, reject) {
-		var combinedTxs = [];
-		if (txidsNotInCache.length > 0) {
-			rpcApi.getRawTransactions(txidsNotInCache).then(function(queriedTxs) {
-				var queriedTxsCurrentIndex = 0;
-				for (var i = 0; i < txids.length; i++) {
-					if (txsByIndex.hasOwnProperty(i)) {
-						combinedTxs.push(txsByIndex[i]);
-
-					} else {
-						var queriedTx = queriedTxs[queriedTxsCurrentIndex];
-						if (queriedTx != null) {
-							combinedTxs.push(queriedTx);
-
-							if (shouldCacheTransaction(queriedTx)) {
-								txCache.set("getRawTransaction-" + queriedTx.txid, queriedTx, 3600000);
-							}
-						}
+		var promises = [];
+		for (var i = 0; i < txids.length; i++) {
+			promises.push(getRawTransaction(txids[i]));
+		}
 
-						queriedTxsCurrentIndex++;
-					}
-				}
+		Promise.all(promises).then(function(results) {
+			resolve(results);
 
-				resolve(combinedTxs);
-			});
-		} else {
-			for (var i = 0; i < txids.length; i++) {
-				combinedTxs.push(txsByIndex[i]);
-			}
-
-			resolve(combinedTxs);
-		}
+		}).catch(function(err) {
+			reject(err);
+		});
 	});
 }
 
diff --git a/app/config.js b/app/config.js
index 4e51ee3..80c68a0 100644
--- a/app/config.js
+++ b/app/config.js
@@ -33,7 +33,7 @@ for (var i = 0; i < electrumXServerUriStrings.length; i++) {
 	electrumXServers.push({protocol:uri.protocol.substring(0, uri.protocol.length - 1), host:uri.hostname, port:parseInt(uri.port)});
 }
 
-["BTCEXP_DEMO", "BTCEXP_PRIVACY_MODE"].forEach(function(item) {
+["BTCEXP_DEMO", "BTCEXP_PRIVACY_MODE", "BTCEXP_NO_INMEMORY_RPC_CACHE"].forEach(function(item) {
 	if (process.env[item] === undefined) {
 		process.env[item] = "false";
 	}
@@ -50,6 +50,7 @@ module.exports = {
 	privacyMode: (process.env.BTCEXP_PRIVACY_MODE == "true"),
 	demoSite: (process.env.BTCEXP_DEMO == "true"),
 	queryExchangeRates: (process.env.BTCEXP_NO_RATES != "true"),
+	noInmemoryRpcCache: (process.env.BTCEXP_NO_INMEMORY_RPC_CACHE.toLowerCase() == "true"),
 	coin: currentCoin,
 
 	rpcBlacklist:
@@ -121,6 +122,8 @@ module.exports = {
 
 	electrumXServers:electrumXServers,
 
+	redisUrl:process.env.BTCEXP_REDIS_URL,
+
 	site: {
 		blockTxPageSize:20,
 		addressTxPageSize:20,
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index ed6fc41..5a83a58 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -716,6 +716,11 @@
       "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-6.2.0.tgz",
       "integrity": "sha512-HygQCKUBSFl8wKQZBSemMywRWcEDNidvNbjGVyZu3nbZ8qq9ubiPoGLMdRDpfSrpkkm9BXYFkpKxxFX38o/76w=="
     },
+    "double-ended-queue": {
+      "version": "2.1.0-0",
+      "resolved": "https://registry.npmjs.org/double-ended-queue/-/double-ended-queue-2.1.0-0.tgz",
+      "integrity": "sha1-ED01J/0xUo9AGIEwyEHv3XgmTlw="
+    },
     "dtrace-provider": {
       "version": "0.8.7",
       "resolved": "https://registry.npmjs.org/dtrace-provider/-/dtrace-provider-0.8.7.tgz",
@@ -2204,6 +2209,26 @@
         "strip-indent": "^2.0.0"
       }
     },
+    "redis": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/redis/-/redis-2.8.0.tgz",
+      "integrity": "sha512-M1OkonEQwtRmZv4tEWF2VgpG0JWJ8Fv1PhlgT5+B+uNq2cA3Rt1Yt/ryoR+vQNOQcIEgdCdfH0jr3bDpihAw1A==",
+      "requires": {
+        "double-ended-queue": "^2.1.0-0",
+        "redis-commands": "^1.2.0",
+        "redis-parser": "^2.6.0"
+      }
+    },
+    "redis-commands": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/redis-commands/-/redis-commands-1.4.0.tgz",
+      "integrity": "sha512-cu8EF+MtkwI4DLIT0x9P8qNTLFhQD4jLfxLR0cCNkeGzs87FN6879JOJwNQR/1zD7aSYNbU0hgsV9zGY71Itvw=="
+    },
+    "redis-parser": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/redis-parser/-/redis-parser-2.6.0.tgz",
+      "integrity": "sha1-Uu0J2srBCPGmMcB+m2mUHnoZUEs="
+    },
     "regenerator-runtime": {
       "version": "0.11.1",
       "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
diff --git a/package.json b/package.json
index 2f9906d..71909ce 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,7 @@
     "morgan": "^1.9.1",
     "pug": "2.0.1",
     "qrcode": "1.2.0",
+    "redis": "2.8.0",
     "request": "2.88.0",
     "serve-favicon": "^2.5.0",
     "simple-git": "1.92.0"