diff --git a/backend/package.json b/backend/package.json
index da72386fe..9c1b3a12a 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -27,7 +27,7 @@
     "package": "npm run build && rm -rf package && mv dist package && mv node_modules package && npm run package-rm-build-deps",
     "package-rm-build-deps": "(cd package/node_modules; rm -r typescript @typescript-eslint)",
     "start": "node --max-old-space-size=2048 dist/index.js",
-    "start-production": "node --max-old-space-size=4096 dist/index.js",
+    "start-production": "node --max-old-space-size=16384 dist/index.js",
     "test": "./node_modules/.bin/jest --coverage",
     "lint": "./node_modules/.bin/eslint . --ext .ts",
     "lint:fix": "./node_modules/.bin/eslint . --ext .ts --fix",
diff --git a/backend/src/api/database-migration.ts b/backend/src/api/database-migration.ts
index 66216c64a..a0200c98c 100644
--- a/backend/src/api/database-migration.ts
+++ b/backend/src/api/database-migration.ts
@@ -7,7 +7,7 @@ import cpfpRepository from '../repositories/CpfpRepository';
 import { RowDataPacket } from 'mysql2';
 
 class DatabaseMigration {
-  private static currentVersion = 52;
+  private static currentVersion = 53;
   private queryTimeout = 3600_000;
   private statisticsAddedIndexed = false;
   private uniqueLogs: string[] = [];
@@ -468,6 +468,11 @@ class DatabaseMigration {
         logger.warn('' + (e instanceof Error ? e.message : e));
       }
     }
+
+    if (databaseSchemaVersion < 53) {
+      await this.$executeQuery('ALTER TABLE statistics MODIFY mempool_byte_weight bigint(20) UNSIGNED NOT NULL');
+      await this.updateToSchemaVersion(53);
+    }
   }
 
   /**
diff --git a/backend/src/api/explorer/nodes.api.ts b/backend/src/api/explorer/nodes.api.ts
index d292aa2e3..b3f83faa6 100644
--- a/backend/src/api/explorer/nodes.api.ts
+++ b/backend/src/api/explorer/nodes.api.ts
@@ -362,7 +362,13 @@ class NodesApi {
   public async $searchNodeByPublicKeyOrAlias(search: string) {
     try {
       const publicKeySearch = search.replace('%', '') + '%';
-      const aliasSearch = search.replace(/[-_.]/g, ' ').replace(/[^a-zA-Z0-9 ]/g, '').split(' ').map((search) => '+' + search + '*').join(' ');
+      const aliasSearch = search
+        .replace(/[-_.]/g, ' ') // Replace all -_. characters with empty space. Eg: "ln.nicehash" becomes "ln nicehash".  
+        .replace(/[^a-zA-Z0-9 ]/g, '') // Remove all special characters and keep just A to Z, 0 to 9.
+        .split(' ')
+        .filter(key => key.length)
+        .map((search) => '+' + search + '*').join(' ');
+      // %keyword% is wildcard search and can't be indexed so it's slower as the node database grow. keyword% can be indexed but then you can't search for "Nicehash" and get result for ln.nicehash.com. So we use fulltext index for words "ln, nicehash, com" and nicehash* will find it instantly.
       const query = `SELECT public_key, alias, capacity, channels, status FROM nodes WHERE public_key LIKE ? OR MATCH alias_search AGAINST (? IN BOOLEAN MODE) ORDER BY capacity DESC LIMIT 10`;
       const [rows]: any = await DB.query(query, [publicKeySearch, aliasSearch]);
       return rows;
diff --git a/production/bitcoin.conf b/production/bitcoin.conf
index 99fbaeed1..46ab41b20 100644
--- a/production/bitcoin.conf
+++ b/production/bitcoin.conf
@@ -5,7 +5,7 @@ listen=1
 discover=1
 par=16
 dbcache=8192
-maxmempool=1337
+maxmempool=4096
 mempoolexpiry=999999
 maxconnections=42
 onion=127.0.0.1:9050