update default cache size

MediaBrowser.Model/Configuration/ServerConfiguration.cs

@@ -192,7 +192,7 @@ namespace MediaBrowser.Model.Configuration
 
         public int MigrationVersion { get; set; }
         public int SchemaVersion { get; set; }
-        public int SqliteCacheSizeKb { get; set; }
+        public int SqliteCacheSize { get; set; }
 
         public bool DownloadImagesInAdvance { get; set; }
 
@@ -212,7 +212,7 @@ namespace MediaBrowser.Model.Configuration
         {
             LocalNetworkAddresses = new string[] { };
             Migrations = new string[] { };
-            SqliteCacheSizeKb = 50000;
+            SqliteCacheSize = 0;
 
             EnableCustomPathSubFolders = true;
             EnableLocalizedGuids = true;

MediaBrowser.Server.Implementations/Persistence/SqliteItemRepository.cs

@@ -123,7 +123,7 @@ namespace MediaBrowser.Server.Implementations.Persistence
 
         protected override async Task<IDbConnection> CreateConnection(bool isReadOnly = false)
         {
-            var cacheSize = _config.Configuration.SqliteCacheSizeKb;
+            var cacheSize = _config.Configuration.SqliteCacheSize;
             if (cacheSize <= 0)
             {
                 cacheSize = Math.Min(Environment.ProcessorCount * 50000, 200000);