Add Env Var to disable second level cache

This is an attempt to track down possible causes of remaining database lockups. Add an environment variable to disable the second-level cache entirely to see if it works better on systems that still experience lockups.

Signed-off-by: gnattu <gnattuoc@me.com>

Emby.Server.Implementations/ConfigurationOptions.cs

@@ -19,7 +19,8 @@ namespace Emby.Server.Implementations
             { FfmpegAnalyzeDurationKey, "200M" },
             { PlaylistsAllowDuplicatesKey, bool.FalseString },
             { BindToUnixSocketKey, bool.FalseString },
-            { SqliteCacheSizeKey, "20000" }
+            { SqliteCacheSizeKey, "20000" },
+            { SqliteDisableSecondLevelCacheKey, bool.FalseString }
         };
     }
 }

Jellyfin.Server.Implementations/Extensions/ServiceCollectionExtensions.cs

@@ -16,21 +16,28 @@ public static class ServiceCollectionExtensions
     /// Adds the <see cref="IDbContextFactory{TContext}"/> interface to the service collection with second level caching enabled.
     /// </summary>
     /// <param name="serviceCollection">An instance of the <see cref="IServiceCollection"/> interface.</param>
+    /// <param name="disableSecondLevelCache">Whether second level cache disabled..</param>
     /// <returns>The updated service collection.</returns>
-    public static IServiceCollection AddJellyfinDbContext(this IServiceCollection serviceCollection)
+    public static IServiceCollection AddJellyfinDbContext(this IServiceCollection serviceCollection, bool disableSecondLevelCache)
     {
-        serviceCollection.AddEFSecondLevelCache(options =>
-            options.UseMemoryCacheProvider()
-                .CacheAllQueries(CacheExpirationMode.Sliding, TimeSpan.FromMinutes(10))
-                .UseCacheKeyPrefix("EF_")
-                // Don't cache null values. Remove this optional setting if it's not necessary.
-                .SkipCachingResults(result => result.Value is null or EFTableRows { RowsCount: 0 }));
+        if (!disableSecondLevelCache)
+        {
+            serviceCollection.AddEFSecondLevelCache(options =>
+                options.UseMemoryCacheProvider()
+                    .CacheAllQueries(CacheExpirationMode.Sliding, TimeSpan.FromMinutes(10))
+                    .UseCacheKeyPrefix("EF_")
+                    // Don't cache null values. Remove this optional setting if it's not necessary.
+                    .SkipCachingResults(result => result.Value is null or EFTableRows { RowsCount: 0 }));
+        }
 
         serviceCollection.AddPooledDbContextFactory<JellyfinDbContext>((serviceProvider, opt) =>
         {
             var applicationPaths = serviceProvider.GetRequiredService<IApplicationPaths>();
-            opt.UseSqlite($"Filename={Path.Combine(applicationPaths.DataPath, "jellyfin.db")}")
-                .AddInterceptors(serviceProvider.GetRequiredService<SecondLevelCacheInterceptor>());
+            var dbOpt = opt.UseSqlite($"Filename={Path.Combine(applicationPaths.DataPath, "jellyfin.db")}");
+            if (!disableSecondLevelCache)
+            {
+                dbOpt.AddInterceptors(serviceProvider.GetRequiredService<SecondLevelCacheInterceptor>());
+            }
         });
 
         return serviceCollection;

Jellyfin.Server/Extensions/WebHostBuilderExtensions.cs

@@ -85,6 +85,6 @@ public static class WebHostBuilderExtensions
                     logger.LogInformation("Kestrel listening to unix socket {SocketPath}", socketPath);
                 }
             })
-            .UseStartup(_ => new Startup(appHost));
+            .UseStartup(_ => new Startup(appHost, startupConfig));
     }
 }

Jellyfin.Server/Startup.cs

@@ -40,15 +40,18 @@ namespace Jellyfin.Server
     {
         private readonly CoreAppHost _serverApplicationHost;
         private readonly IServerConfigurationManager _serverConfigurationManager;
+        private readonly IConfiguration _startupConfig;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Startup" /> class.
         /// </summary>
         /// <param name="appHost">The server application host.</param>
-        public Startup(CoreAppHost appHost)
+        /// <param name="startupConfig">The server startupConfig.</param>
+        public Startup(CoreAppHost appHost, IConfiguration startupConfig)
         {
             _serverApplicationHost = appHost;
             _serverConfigurationManager = appHost.ConfigurationManager;
+            _startupConfig = startupConfig;
         }
 
         /// <summary>
@@ -67,7 +70,7 @@ namespace Jellyfin.Server
             // TODO remove once this is fixed upstream https://github.com/dotnet/aspnetcore/issues/34371
             services.AddSingleton<IActionResultExecutor<PhysicalFileResult>, SymlinkFollowingPhysicalFileResultExecutor>();
             services.AddJellyfinApi(_serverApplicationHost.GetApiPluginAssemblies(), _serverConfigurationManager.GetNetworkConfiguration());
-            services.AddJellyfinDbContext();
+            services.AddJellyfinDbContext(_startupConfig.GetSqliteSecondLevelCacheDisabled());
             services.AddJellyfinApiSwagger();
 
             // configure custom legacy authentication

MediaBrowser.Controller/Extensions/ConfigurationExtensions.cs

@@ -64,6 +64,11 @@ namespace MediaBrowser.Controller.Extensions
         /// </summary>
         public const string SqliteCacheSizeKey = "sqlite:cacheSize";
 
+        /// <summary>
+        /// Disable second level cache of sqlite.
+        /// </summary>
+        public const string SqliteDisableSecondLevelCacheKey = "sqlite:disableSecondLevelCache";
+
         /// <summary>
         /// Gets a value indicating whether the application should host static web content from the <see cref="IConfiguration"/>.
         /// </summary>
@@ -128,5 +133,26 @@ namespace MediaBrowser.Controller.Extensions
         /// <returns>The sqlite cache size.</returns>
         public static int? GetSqliteCacheSize(this IConfiguration configuration)
             => configuration.GetValue<int?>(SqliteCacheSizeKey);
+
+        /// <summary>
+        /// Gets whether second level cache disabled from the <see cref="IConfiguration" />.
+        /// </summary>
+        /// <param name="configuration">The configuration to read the setting from.</param>
+        /// <returns>Whether second level cache disabled.</returns>
+        public static bool GetSqliteSecondLevelCacheDisabled(this IConfiguration configuration)
+        {
+            var disableSecondLevelCacheConfig = configuration.GetValue<string?>(SqliteDisableSecondLevelCacheKey);
+            var disableSecondLevelCache = false;
+            if (disableSecondLevelCacheConfig is not null)
+            {
+                disableSecondLevelCache = disableSecondLevelCacheConfig.ToUpperInvariant() switch
+                {
+                    "FALSE" or "NO" or "0" => false,
+                    _ => true
+                };
+            }
+
+            return disableSecondLevelCache;
+        }
     }
 }